MTS TestSuite Multipurpose Simulated Testing User Guide 100-232-130 E be certain.
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Contents 1.0 Technical Support 9 1.1.0 How to Get Technical Support........................................................................................................9 1.2.0 Before You Contact MTS................................................................................................................9 1.3.0 If You Contact MTS by Phone......................................................................................................11 1.4.0 Problem Submittal Form in MTS Manuals..............
5.2.2.5.0 Data Storage Parameters.................................................................................34 5.2.2.6.0 Test Termination Parameters...........................................................................34 5.2.2.7.0 Assign Precrack Values...................................................................................35 5.2.2.8.0 Calculator........................................................................................................35 5.2.3.0 Run the Test...............
.3.4.0 View Test Results...........................................................................................................52 5.3.4.1.0 View Test Results............................................................................................52 5.3.4.2.0 Fracture Test Results.......................................................................................52 5.3.5.0 Perform Data Analysis...................................................................................................53 5.
5.5.2.2.0 JIC Parameter Values for Simulation..............................................................70 5.5.2.3.0 Precrack Parameters........................................................................................73 5.5.2.4.0 JIC Parameters.................................................................................................74 5.5.2.5.0 COD Mode Parameters...................................................................................75 5.5.2.6.0 Displacement Mode Parameters.....
5.6.3.5.0 Enter Measured Crack Sizes............................................................................93 5.6.3.6.0 End Simulation Test........................................................................................93 5.6.4.0 View Test Results...........................................................................................................93 5.6.4.1.0 View Test Results............................................................................................93 5.6.4.2.
1.0 Technical Support 1.1.0 How to Get Technical Support Start with your manuals The manuals supplied by MTS provide most of the information you need to use and maintain your equipment. If your equipment includes software, look for online help and README files that contain additional product information. Technical support methods MTS provides a full range of support services after your system is installed.
Know your site number and system number The site number contains your company number and identifies your equipment type (such as material testing or simulation). The number is typically written on a label on your equipment before the system leaves MTS. If you do not know your MTS site number, contact your sales engineer. Example site number: 571167 When you have more than one MTS system, the system job number identifies your system. You can find your job number in your order paperwork.
• Keyboard enhancers • Print spoolers • Messaging applications 1.3.0 If You Contact MTS by Phone A Call Center agent registers your call before connecting you with a technical support specialist. The agent asks you for your: • Site number • Name • Company name • Company address • Phone number where you can be reached If your issue has a notification number, please provide that number. A new issue will be assigned a unique notification number.
• Write down any specific instructions. After you call MTS logs and tracks all calls to ensure that you receive assistance for your problem or request. If you have questions about the status of your problem or have additional information to report, please contact Technical Support again and provide your original notification number. 1.4.
2.0 Preface 2.1.0 Before You Begin Safety first! Before you use your MTS product or system, read and understand the safety information provided with your system. Improper installation, operation, or maintenance can result in hazardous conditions that can cause severe personal injury or death, or damage to your equipment and specimen. Again, read and understand the safety information provided with your system before you continue.
CAUTION: Caution notices indicate the presence of a hazard with a low level of risk which, if ignored, could cause moderate or minor personal injury or equipment damage, or could endanger test integrity. Other special text conventions Important: Important notices provide information about your system that is essential to its proper function. While not safety-related, if the important information is ignored, test results may not be reliable, or your system may not operate properly.
Hypertext links The electronic document has many hypertext links displayed in a blue font. All blue words in the body text, along with all contents entries and index page numbers, are hypertext links. When you click a hypertext link, the application jumps to the corresponding topic.
3.0 Controller Simulation Overview Topics: • • • • Controller Simulation..............................................................................................................................18 Simulation Controller Configuration Files and Test Names...................................................................18 Fatigue Templates.................................................................................................................................19 Fracture Templates.................
3.0 Controller Simulation Overview 3.1.0 Controller Simulation Simulated controller The MTS TestSuite Controller Simulation Software CD includes the necessary software, controller files, and test files to run fully-functional fatigue and fracture tests in a simulated controller environment. The special controller configuration and hardware interface files allow you to set up and simulate the execution of tests. You can use one of the supplied sample tests, or you can create your own test.
3.0 Controller Simulation Overview If you run a simulated test and then want to run a different template, you must use the MPE application to disconnect from the controller (Controller > Disconnect), use the Station Manager application to open the configuration file required for the new template (see the table below), and then use the MPE application to connect to the controller (Controller > Connect).
3.0 Controller Simulation Overview Low-Cycle Fatigue Templates Template Description ASTM LCF Strain This template complies with ASTM standard E606-04 and ASTM standard D3479/D 3479M-96 (Reapproved 2007). The template is designed to run LCF tests, analyze the resulting data, and provide reports of the results. ASTM LCF Strain This template complies with ASTM standard Elevated Temperature E606-04 and ASTM standard D3479/D 3479M-96 (Reapproved 2007).
3.0 Controller Simulation Overview Template Description to run Transition Tests, analyze the resulting data, and provide reports of the results. Transition Test This template complies with ASTM Standard E Elevated Temperature 606-04 and ASTM standard D3479/D 3479M-96 (Reapproved 2007). The template is designed to run Transition Tests with elevated temperature, analyze the resulting data, and provide reports of the results.
3.0 Controller Simulation Overview Template Description ASTM E 647 Fatigue Crack Growth DCPD This template complies with ASTM standard E647-08 and is designed to run FCG DC Potential Drop (DCPD) tension tests, analyze the resulting data, and provide reports of the results. Legacy FCG This template is designed to analyze data acquired from tests run with the MTS 793.40 FTG Test application and provide reports of the results.
3.0 Controller Simulation Overview Toughness The following template is available for Toughness tests and analysis: Toughness Templates Template Description ASTM E1290 CTOD This template complies with ASTM E 1290 - 07 and is designed to determine the fracture toughness value of materials.
4.0 Install Simulation Software Topics: • • • • • Install Install Install Install Install MTS TestSuite Multipurpose Software........................................................................................26 the Simulated FlexTest Controller...............................................................................................26 MTS Series 793 Software...........................................................................................................
4.0 Install Simulation Software 4.1.0 Install MTS TestSuite Multipurpose Software To install the MTS TestSuite Multipurpose software: 1. Launch the MTS TestSuite self-extracting executable. 2. On the MTS TestSuite Multipurpose Software Install window, click FlexTest. 3. Select option 1) TestSuite Software Installation. Follow the instructions in the InstallShield Wizard and restart your computer if prompted.
4.0 Install Simulation Software 4.4.0 Install Controller Configuration Files To install controller configuration files: 1. Start the MTS_TestSuite_Simulation self-extracting executable to restart the installation process. The MTS 793 Simulation Software Setup window appears. 2. Click the Install Controller Configuration Files link. An installation command script installs the necessary controller configuration and hardware interface files on your system. 4.5.
5.0 Running Simulation Tests Topics: • • • • • • Simulated Controller Startup..................................................................................................................30 Run Simulated Toughness Test.............................................................................................................30 Run Simulated FCG Compliance Test...................................................................................................42 Run the Simulated FCG DCPD Test...........
5.0 Running Simulation Tests 5.1.0 Simulated Controller Startup 5.1.1.0 Start the MTS TestSuite Simulation Software To start the MTS TestSuite simulation software: 1. Click Start > Programs > MTS Series 793 Software > Station Manager. 2. When prompted to choose a controller, choose the controller that has “TestSuite Simulation” in its title. 3. When prompted to select a configuration file, select the appropriate controller configuration file with “Virt_” in its title.
5.0 Running Simulation Tests 3. If any report template (.xltx) files from the import file already exist, you are prompted to Overwrite the files or Cancel the import. If you already have a test open, you may be prompted to save changes before closing the open test. 4. Click OK to close the message window and open the selected test.
5.0 Running Simulation Tests Precrack Parameter Values Parameter Value to Use for Simulation Precrack Final Crack Limit 25 mm Precrack Frequency 10 Hz Precrack Load Ratio 0.100 unitless Precrack Lower Least Squares Fit 10% Percentage Precrack Upper Least Squares Fit 90% Percentage Precrack Cycle Limit 1000000 count Precrack Final Maximum K 0.348 kN/mm^1.5 The following table lists the COD (Crack Opening Displacement) parameter values.
5.0 Running Simulation Tests Test Termination Parameter Values Parameter Description End on COD Limit Yes COD Limit 1.2 mm End on Load Limit No Load Limit No End on Displacement Limit No Displacement Limit 50.000 mm 5.2.2.3.0 Precrack Parameters The following table lists the precrack parameters and their required values. Precrack Parameters Parameter Description Precrack Final Crack Limit Specify the desired crack size to achieve in the precrack activity.
5.0 Running Simulation Tests Parameter Description Precrack Cycle Limit Specify the number of cycles at which precrack activity stops. Precrack Final Maximum Specify the maximum stress intensity desired K at the end of precrack activity. The initial precrack Maximum K is 1.4 times the Final Maximum K value. 5.2.2.4.
5.0 Running Simulation Tests 5.2.2.7.0 Assign Precrack Values Specify these parameters if the specimen was precracked on another load frame. When the precrack parameters are specified here, you can then skip Precrack Specimen in the Main Menu window. Precrack Parameters Parameter Description Precrack Cycles Completed Specify the number of precrack cycles completed. Precrack Final Crack Size Specify the final crack size calculated from compliance.
5.0 Running Simulation Tests Stress Intensity K Parameters Parameter Description Crack Size Specify the crack size value to use in the stress intensity (K) calculation. Load Specify the load value to use in the stress intensity (K) calculation. 5.2.3.0 Run the Test 5.2.3.1.0 Turn On Hydraulic Power Use the control panel to apply hydraulic power. 1. If the Interlock indicator is on, click Reset to release system interlocks.
5.0 Running Simulation Tests Parameter Description Elastic Modulus Specify the modulus used for crack size calculations. Ramp to Percent Specify the percent of load applied on the specimen in order to check the crack size. The load is ramped from zero to the specified percentage of load.The percentage is based on the last load command. Ramp Time Specify the time to ramp to the target load. 5.2.3.3.0 Precrack Specimen 1. Click Precrack in the Main Menu window. 2.
5.0 Running Simulation Tests 5. Typically, the activity will stop when a desired test termination parameter is achieved. In this case, review the activity end result, and then click Close. 5.2.3.5.0 Perform Fatigue Crack Mark 1. Click Crack Size Check in the Main Menu window. 2. In the Main Menu window, click Fatigue Crack Mark. 3. Specify the Crack Growth Parameters. This test activity uses fatigue crack growth with a constant load control mode. 4. Review the parameters.
5.0 Running Simulation Tests Parameter Description acceptable because of the higher frequencies of some tests. FCG Measure Load Level Specify the voltage that is measured at this load level. This parameter is used only for FCG DCPD tests. 5.2.3.7.0 Enter Measured Crack Sizes The software automatically enters the crack sizes from the end of the precrack activity and the crack sizes from the end of the test.
5.0 Running Simulation Tests • Crack Size Check Cycle - Data Acquisition shows data that was acquired during the crack size check activity. • Precrack Command - Data Acquisition shows data that was acquired during the precrack activity. • Data Acquisition shows data that was acquired during the test activity. The test does not generate any reports. You can generate reports with the results generated during post-test analysis. 5.2.5.0 Perform Data Analysis 5.2.5.1.
5.0 Running Simulation Tests The variable definitions and mapping are transferred to your new test and can be modified to meet your requirements. Your original test is protected from any new values, variables, and calculations you make in your analysis. The test data does not change. Analysis data and calculation changes do not modify the test run data in any way With the variables defined, mapped, or calculated, you can begin reviewing and analyzing the data through the various charts and tables. 5.2.5.2.
5.0 Running Simulation Tests Channels by Time Table The Channels by Time table lists all data points collected in arrays: • Time Array • Load Array • CTOD Array • Displacement Array Charts Charts provide visual indicators of the data reported in the tables. • The Load vs. Time chart indicates changes in the load during the test. • The COD vs. Time chart indicates changes in the crack opening displacement during the test. • The Displacement vs.
5.0 Running Simulation Tests Note: The test you open and use must correspond to the controller files that were copied to the workstation and the configuration that was selected when the controller software was started. 5.3.1.3.0 Create a New Test Run To create a new test run: 1. Click New Test Run. 2. Select a specimen from the Select a Specimen window, and then click OK. To create a new specimen: a) Click Add New. b) Optionally specify a Specimen Name. c) Select a Geometry.
5.0 Running Simulation Tests Parameter Value to Use for Simulation Precrack Lower Least Squares Fit 10% Percentage Precrack Upper Least Squares Fit 90% Percentage Precrack Cycle Limit 1000000 count Precrack Final Maximum K 347.851 N/mm^1.5 The following list shows delta K parameter values. Delta K Parameter Values Parameter Value to Use for Simulation FCG Load Ratio 0.10 unitless FCG Delta-K Initial 379.413 N/mm^1.5 Normalized K Gradient (C) -0.
5.0 Running Simulation Tests Parameter Value to Use for Simulation Store Every Nth Precrack Cycle 100 count FCG Lower Least Squares Fit Percentage 10% FCG Upper Least Squares Fit Percentage 90% Store Every Nth FCG Cycle 2000 count The following list shows test termination parameter values. Test Termination Parameter Values Parameter Description FCG Final Crack Limit 40 mm FCG Crack Growth Rate Limit 1.
5.0 Running Simulation Tests Parameter Description squares fit compliance determination. This parameter is not used for FCG DCPD tests. Precrack Upper Least Squares Fit Percentage Specify the percentage of the measured load range used as the upper limit for linear least squares fit compliance determination. This parameter is not used for FCG DCPD tests. Precrack Measure Load Level Specify the load level at which the voltage is measured. The load is applied at this level to ensure the crack is open.
5.0 Running Simulation Tests Parameter Description FCG Wave Shape Specify the wave shape of the command signal. The choices are True Sine or True Ramp. Typically, you use a True Ramp wave shape where uniform strain-rate sensitivity is important, and a True Sine wave shape where a continually varying strain rate is acceptable because of the higher frequencies of some tests. FCG Measure Load Level Specify the load level at which the voltage is measured. This parameter is used only for FCG DCPD tests. 5.
5.0 Running Simulation Tests 5.3.2.7.0 Data Storage Parameters Properties Data Storage Parameters Parameter Description Precrack Save Percent Limit Specify the percentage of precrack activity that must complete before data is saved to disk. Store Every Nth Pre-crack Specify the cycle intervals written to disk Cycle during the precrack activity. FCG Lower Least Squares Specify the lower load limit for linear least Fit Percentage squares fit compliance used to determine when to start saving data to disk.
5.0 Running Simulation Tests Precrack Parameters Parameter Description Precrack Cycles Completed Specify the number of precrack cycles completed. Precrack Final Crack Size Specify the final crack size calculated from compliance. Precrack Final P Specify the final load during precrack. Precrack P Maximum Specify the maximum load measured during precrack. Precrack Final K Specify the final K during precrack. Precrack K Maximum Specify the maximum K value during precrack.
5.0 Running Simulation Tests Stress Intensity K Parameters Parameter Description Crack Size Specify the crack size value to use in the stress intensity (K) calculation. Load Specify the load value to use in the stress intensity (K) calculation. 5.3.3.0 Run the Test 5.3.3.1.0 Turn On Hydraulic Power Use the control panel to apply hydraulic power. 1. If the Interlock indicator is on, click Reset to release system interlocks.
5.0 Running Simulation Tests Parameter Description Elastic Modulus Specify the modulus used for crack size calculations. Ramp to Percent Specify the percent of load applied on the specimen in order to check the crack size. The load is ramped from zero to the specified percentage of load.The percentage is based on the last load command. Ramp Time Specify the time to ramp to the target load. 5.3.3.3.0 Precrack Specimen 1. Click Precrack in the Main Menu window. 2.
5.0 Running Simulation Tests 5.3.3.5.0 Enter Measured Crack Sizes The software automatically enters the crack sizes from the end of the precrack activity and the crack sizes from the end of the test. By default, the Precrack values are the last series of crack sizes measured during the precrack activity and the Crack values are the last series of crack sizes measured during the test. These crack sizes are used during data analysis. Optionally, you can change these values for the test run.
5.0 Running Simulation Tests 5.3.5.0 Perform Data Analysis 5.3.5.1.0 Start the Analyzer Application To start the analyzer application: 1. 2. 3. 4. 5. 6. On the Tools menu, click Fracture Analyzer Application. Right-click the test run that you want to analyze and select New Analysis Run. Type a New Definition Name or accept the default. Click Add Analysis. Click Variable Editor. Examine the variables and their definitions to verify that they are what you expect. Click Data Acquisition Editor.
5.0 Running Simulation Tests 5.3.5.2.0 Fatigue Crack Growth Analysis View The template is preconfigured with a data view that conforms to the analysis portion of the ASTM standard. The data view contains the following tables and charts. Analysis Inputs Table The Analysis Inputs table contains the parameters used for the analysis. In the Display Name column, the FCG da/dN Curve Fit row indicates the Secant or Polynomial fit calculation method.
5.0 Running Simulation Tests Validity Results Table The Validity Results table includes the Display Name, Value, Modified Indicator, Original Value, and Calculation. The Display Name includes the validity criteria. The Value and Original Value columns contain indicators that are Yes or No values. The validity of the test results can change because of changes in test values.
5.0 Running Simulation Tests 5.4.0 Run the Simulated FCG DCPD Test 5.4.1.0 Open The Test 5.4.1.1.0 Open the Configuration File for the Test Determine the controller configuration file that you must open to run the simulated template test. 5.4.1.2.0 Start the Multipurpose Elite Application and Import a Test To start the MPE application and import a test: 1. On the Multipurpose Elite File menu, click Import > Test. 2. In the Import Test window: a.
5.0 Running Simulation Tests 5. Reset the interlocks if needed and select the Low, then High, power buttons. 6. Click Run to run the test. 5.4.2.0 Set the FGC DCPD Test Parameters 5.4.2.1.0 Test Parameters Overview After a new test run is added to the test, the Main Menu window appears. This window provides access to all necessary test parameters. Click the parameter buttons in the Main Menu window to specify parameter values for the test. 5.4.2.2.
5.0 Running Simulation Tests Parameter Value to Use for Simulation Normalized K Gradient (C) 0 1/mm FCG Measure Load Level 0 kN Constant Load Parameter Values Parameter Value to Use for Simulation FCG Wave Shape True Sine FCG Frequency 10 Hz FCG End Level 1 5 kN FCG Load Ratio 0.
5.0 Running Simulation Tests 5.4.2.3.0 Precrack Parameters The following table lists the precrack parameters and their required values. Precrack Parameters Parameter Description Precrack Final Crack Limit Specify the desired crack size to achieve in the precrack activity. When the specified crack size is achieved, the activity stops. Precrack Frequency Specify the cycle frequency of the command signal for the precrack activity.
5.0 Running Simulation Tests 5.4.2.5.0 Delta K Control Mode Parameters Delta K Control Mode Parameters Parameter Description FCG Load Ratio Specify the ratio of the minimum to maximum K applied to the specimen. The minimum K is determined by this value and the maximum K is specified by you. FCG Delta-K Max Specify the maximum stress intensity (K) value used in Delta-K control. Normalized K Gradient (C) Specify the maximum and minimum stress intensity change as the crack size changes.
5.0 Running Simulation Tests Parameter Description FCG Frequency Specify the cycle frequency of the command signal. FCG Wave Shape Specify the wave shape of the command signal. The choices are True Sine or True Ramp. Typically, you use a True Ramp wave shape where uniform strain-rate sensitivity is important, and a True Sine wave shape where a continually varying strain rate is acceptable because of the higher frequencies of some tests.
5.0 Running Simulation Tests Parameter Description Load Limit Specify Yes to end the test when the load limit is reached. Displacement Limit Specify Yes to end the test when the displacement limit is reached. 5.4.2.9.0 Assign Precrack Values Specify these parameters if the specimen was precracked on another load frame. When the precrack parameters are specified here, you can then skip Precrack Specimen in the Main Menu window.
5.0 Running Simulation Tests Load P Parameters Parameter Description Crack Size Specify the crack size value to use in the load calculation. Stress Intensity K Specify the stress intensity (K) value to use in the load calculation. The following table lists the stress intensity K parameters. Stress Intensity K Parameters Parameter Description Crack Size Specify the crack size value to use in the stress intensity (K) calculation.
5.0 Running Simulation Tests Note: The Simulation CD includes a sample test that is based on the FCG DCPD template. To run the sample test, you must enter specific initial crack value parameters. For DCPD Voltage Option, select On/Off; for Initial Crack Size, enter 17 mm; for Initial Crack Load, enter 3 kN. DCPD Initial Crack Value Parameters Parameter Description DCPD Voltage Option On/Off—Turn the current that is applied to the specimen on and off.
5.0 Running Simulation Tests 2. Review the parameters. a) Click Yes to start with the parameters that are shown. b) Click No to return to the Main Menu and to change parameters. 3. Click Run on the control panel to start the activity. Optionally, if you want to review or change parameters, click Return to Main Menu. To suspend the activity after the activity starts, click Hold. When you suspend the activity, data collection stops and the application attempts to hold at the mean level.
5.0 Running Simulation Tests 5.4.4.2.0 Fracture Test Results The Test Results show the following information about the test run: • Variable Summary shows all the parameters and their last values for the test run. • Crack Size Check Cycle - Data Acquisition shows data that was acquired during the crack size check activity. • Precrack Command - Data Acquisition shows data that was acquired during the precrack activity. • Data Acquisition shows data that was acquired during the test activity.
5.0 Running Simulation Tests The recalculated values are updated in the currently open analysis run. A recommended procedure is to create a copy of your test and analysis definition. 11. Click File > Save As to save your test. 12. Type a new test name and click Save. The variable definitions and mapping are transferred to your new test and can be modified to meet your requirements. Your original test is protected from any new values, variables, and calculations you make in your analysis.
5.0 Running Simulation Tests Crack Length, Min/Max K, Load by Cycles Table The Crack Length, Min/Max K, Load by Cycles table provides values for the cycles in the FCG Cycle Array column.
5.0 Running Simulation Tests Charts The charts provide visual indicators of the crack growth rate and the forces that affect the rate. • The da/dN vs. Delta K chart characterizes the specimen material’s resistance to stable crack extension under cyclic loading. • The Load vs. Cycle chart indicates the load range between the minimum and maximum values during the last or other specified cycle. • The Crack Opening Displacement vs.
5.0 Running Simulation Tests Note: The test you open and use must correspond to the controller files that were copied to the workstation and the configuration that was selected when the controller software was started. 5.5.1.3.0 Create a New Test Run To create a new test run: 1. Click New Test Run. 2. Select a specimen from the Select a Specimen window, and then click OK. To create a new specimen: a) Click Add New. b) Optionally specify a Specimen Name. c) Select a Geometry.
5.0 Running Simulation Tests Parameter Value to Use for Simulation Precrack Load Ratio 0.1 unitless Precrack Lower Least Squares Fit Percentage 20% Precrack Upper Least Squares Fit Percentage 80% Precrack Cycle Limit 1000000 count Precrack Final Maximum K 0.348 kN/mm^1.
5.0 Running Simulation Tests Parameter Description JIC Percent Unload 25% JIC Reload Rate 4 kN/s JIC Unload Rate 5 kN/s JIC Data Frequency 30 Hz Displacement Control Mode Step Parameters Displacement Control Mode Step Parameter Values Parameter Description Use COD Step Limit No JIC Ramp COD Limit Increment 0 mm Use Load Step Limit No JIC Ramp Load Limit Increment 0 kN Displacement Control Mode Parameter Values Parameter Description JIC Displacement Increment 0.
5.
5.0 Running Simulation Tests Precrack Parameters Parameter Description Precrack Final Crack Limit Specify the desired crack size to achieve in the precrack activity. When the specified crack size is achieved, the activity stops. Precrack Frequency Specify the cycle frequency of the command signal for the precrack activity. Precrack Load Ratio Specify the ratio of the minimum to maximum load applied to the specimen. The minimum load is determined by this value and the maximum load is specified by you.
5.0 Running Simulation Tests 5.5.2.5.0 COD Mode Parameters COD Mode Parameters Parameter Description JIC Absolute Unload Specify the amount of force, in force units, to unload in both the unload and reload segments. JIC COD Increment Specify the COD increment that will be added to the current COD level at the beginning of each ramp segment to determine a maximum COD for this step.
5.0 Running Simulation Tests Parameter Description displacement exceeds the specified limit value during the ramp segment of a step. When the limit trips, the JIC step immediately switches to the hold segment of the JIC step. JIC Ramp Load Limit Increment Specify a value other than zero to apply a load limit during the ramp segment of a JIC step. The limit trips if the measured load exceeds the specified limit value during the ramp segment of a step.
5.0 Running Simulation Tests 5.5.2.6.0 Displacement Mode Parameters Displacement Mode Parameters Parameter Description JIC Absolute Unload See description in COD mode parameters. JIC Displacement Increment Specify the displacement increment added to the current displacement level at the beginning of each ramp segment to determine a maximum displacement for this step. If the maximum displacement is reached before the maximum COD or load level is reached, it triggers the next segment of the step.
5.0 Running Simulation Tests 5.5.2.7.0 Data Storage Parameters Data Storage Parameters Parameter Description Precrack Save Percent Limit Specify the percentage of precrack activity that must complete before data is saved to disk. Store Every Nth Pre-crack Specify the cycle intervals written to disk Cycle during the precrack activity. Lower Least Squares Fit Percentage Specify the lower load limit for linear least squares fit compliance used to determine when to start saving data to disk.
5.0 Running Simulation Tests Precrack Parameters Parameter Description Precrack Cycles Completed Specify the number of precrack cycles completed. Precrack Final Crack Size Specify the final crack size calculated from compliance. Precrack Final P Specify the final load during precrack. Precrack P Maximum Specify the maximum load measured during precrack. Precrack Final K Specify the final K during precrack. Precrack K Maximum Specify the maximum K value during precrack.
5.0 Running Simulation Tests Stress Intensity K Parameters Parameter Description Crack Size Specify the crack size value to use in the stress intensity (K) calculation. Load Specify the load value to use in the stress intensity (K) calculation. 5.5.3.0 Run the Test 5.5.3.1.0 Turn On Hydraulic Power Use the control panel to apply hydraulic power. 1. If the Interlock indicator is on, click Reset to release system interlocks.
5.0 Running Simulation Tests Parameter Description Elastic Modulus Specify the modulus used for crack size calculations. Ramp to Percent Specify the percent of load applied on the specimen in order to check the crack size. The load is ramped from zero to the specified percentage of load.The percentage is based on the last load command. Ramp Time Specify the time to ramp to the target load. 5.5.3.3.0 Precrack Specimen 1. Click Precrack in the Main Menu window. 2.
5.0 Running Simulation Tests 5. Typically, the activity stops when a desired test termination parameter is achieved. In this case, review the activity end result, and then click Close. 5.5.3.5.0 Enter Measured Crack Sizes The software automatically enters the crack sizes from the end of the precrack activity and the crack sizes from the end of the test.
5.0 Running Simulation Tests 2. Click Results. 3. Click on the different tabs to view different types of results. 5.5.4.2.0 Fracture Test Results The Test Results show the following information about the test run: • Variable Summary shows all the parameters and their last values for the test run. • Crack Size Check Cycle - Data Acquisition shows data that was acquired during the crack size check activity. • Precrack Command - Data Acquisition shows data that was acquired during the precrack activity.
5.0 Running Simulation Tests 9. To calculate a variable for every cycle, select the variable name from the Additional Cycle Variable Calculations list and click the right arrow button. 10. When you have finished the mapping, click Refresh. The recalculated values are updated in the currently open analysis run. A recommended procedure is to create a copy of your test and analysis definition. 11. Click File > Save As to save your test. 12. Type a new test name and click Save.
5.0 Running Simulation Tests Channels by Step Table The Channels by Step table lists all data points collected in arrays: • Segment Type Array • Complete Load Data • Complete COD Data • Complete Displacement Data • Complete JIC Step Array Charts The charts provide visual indicators of the data reported in the tables. • The Crack Sizes vs. Steps chart indicates as a curve how the crack grows during the load steps. • The Load vs. Time chart indicates changes in the load during the test.
5.0 Running Simulation Tests a. Click Browse and navigate to the location of the simulated test files. By default, the simulated test files are saved to the C:\MTS TestSuite\TestArchives folder. b. Select the test you want to open, and then click Open. 3. If any report template (.xltx) files from the import file already exist, you are prompted to Overwrite the files or Cancel the import. If you already have a test open, you may be prompted to save changes before closing the open test. 4.
5.0 Running Simulation Tests Precrack Parameters Precrack Parameter Values Parameter Value to Use for Simulation Precrack Final Crack Limit 25.4 mm Precrack Frequency 10 Hz Precrack Load Ratio 0.1 unitless Precrack Lower Least Squares Fit 10% Percentage Precrack Upper Least Squares Fit 90% Percentage Precrack Cycle Limit 1000000 count Precrack Final Maximum K 347.851 N/mm^1.
5.0 Running Simulation Tests Parameter Value to Use for Simulation KIC COD Upper Limit 1.35 mm KIC Use Load Limit No KIC Load Upper Limit 200000 N KIC Use Displacement Limit No KIC Displacement Upper Limit 50 mm 5.6.2.3.0 Precrack Parameters The following table lists the precrack parameters and their required values. Precrack Parameters Parameter Description Precrack Final Crack Limit Specify the desired crack size to achieve in the precrack activity.
5.0 Running Simulation Tests Parameter Description Precrack Final Maximum Specify the maximum stress intensity desired K at the end of precrack activity. The initial precrack Maximum K is 1.4 times the Final Maximum K value. 5.6.2.4.0 KIC Parameters In the KIC Parameters section of the main menu, you specify the KIC Force Ramp Rate, which is the rate for the ramp segment of the KIC step. 5.6.2.5.
5.0 Running Simulation Tests Parameter Description JIC Maximum Crack Size Specify the crack size that, if reached, stops the test. JIC Maximum Crack Extension Specify the crack extension that, if reached, stops the test. 5.6.2.7.0 Assign Precrack Values Specify these parameters if the specimen was precracked on another load frame. When the precrack parameters are specified here, you can then skip Precrack Specimen in the Main Menu window.
5.0 Running Simulation Tests Load P Parameters Parameter Description Crack Size Specify the crack size value to use in the load calculation. Stress Intensity K Specify the stress intensity (K) value to use in the load calculation. The following table lists the stress intensity K parameters. Stress Intensity K Parameters Parameter Description Crack Size Specify the crack size value to use in the stress intensity (K) calculation.
5.0 Running Simulation Tests 4. Click Run on the control panel to start the crack size check. Optionally, if you want to review or change parameters, click Return to Main Menu. 5. When finished with this activity, click Close. Crack Size Check Parameters Parameter Description Entered Crack Size Specify the crack size used to calculate the elastic modulus. The default value is equal to the specimen notch size. Elastic Modulus Specify the modulus used for crack size calculations.
5.0 Running Simulation Tests To suspend the activity after it starts, click Hold. When you suspend the activity, data collection stops and the application attempts to hold at the mean level. To stop the activity, click Stop. When you stop the activity, the application immediately ramps to zero load and saves the test data. 4. Review the process of the test activity by monitoring the runtime displays. • On the KIC Runtime Display tab, monitor Force versus COD plot.
5.0 Running Simulation Tests 5.6.4.2.0 Fracture Test Results The Test Results show the following information about the test run: • Variable Summary shows all the parameters and their last values for the test run. • Crack Size Check Cycle - Data Acquisition shows data that was acquired during the crack size check activity. • Precrack Command - Data Acquisition shows data that was acquired during the precrack activity. • Data Acquisition shows data that was acquired during the test activity.
5.0 Running Simulation Tests The recalculated values are updated in the currently open analysis run. A recommended procedure is to create a copy of your test and analysis definition. 11. Click File > Save As to save your test. 12. Type a new test name and click Save. The variable definitions and mapping are transferred to your new test and can be modified to meet your requirements. Your original test is protected from any new values, variables, and calculations you make in your analysis.
5.0 Running Simulation Tests • Physical Stress Intensity • Net Section Stress • Validity Channels by Time The Channels by Time table lists all data points collected in arrays: • KIC Time Array • KIC Load Array • KIC Crack Opening Displacement Inverted Array • Displacement Inverted Array Charts The charts provide visual indicators of the data reported in the tables. • The Load vs. Time chart indicates changes in the load during the test. • The COD vs.
Index A Additional Cycle Variable Calculations 40, 53, 66, 83, 94 Analysis Inputs table 41 assign precrack values 35, 48, 62, 78, 90 ASTM D3479/D 3479M-96 (2007) 20 E 1290 - 07 23 E-1820-08 22 E-466-07 20 E-606-04 20, 21 C calculator 35, 49, 62, 79, 90 Channels by Time table 42 charts 42, 55, 69, 85, 96 COD 32 configuration files 18, 19 constant load control mode parameters 38, 47, 60 controller resources 18 controller simulation start 30 crack growth parameters 57 Crack Opening Displacement 32 crack size
precrack parameters 31, 33, 45, 59, 73, 88 precrack specimen 37, 51, 64, 81, 92 simulation software setup 30 start 30 specimen add new 31, 43, 56, 70, 86 select 31, 43, 56, 70, 86 specimen precrack 37, 51, 64, 81, 92 Station Manager simulation start 30 stress intensity (K) 35, 49, 63, 79, 91 template (continued) Low-Cycle Fatigue 19 Toughness 23 Transition Test 20 Transition Test Elevated Temperature 20 Trapezoidal Strain 21 test execution 51, 64 new run 31, 43, 56, 70, 86 test files 18 test parameters 31
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