2010
Table Of Contents
- Contents
- Part 1 Overview
- 1 About AutoCAD Mechanical
- AutoCAD Mechanical Software Package
- Leveraging Legacy Data
- Starting AutoCAD Mechanical
- AutoCAD Mechanical Help
- Product Support and Training Resources
- Design Features in AutoCAD Mechanical
- Mechanical Structure
- Associative Design and Detailing
- External References for Mechanical Structure
- Associative 2D Hide
- Autodesk Inventor link
- 2D Design Productivity
- Engineering Calculations
- Machinery Systems Generators
- Intelligent Production Drawing and Detailing
- Detailing Productivity
- Annotations
- Standard Mechanical Content
- Standard Parts Tools
- Collaboration
- 2 Commands in AutoCAD Mechanical
- 1 About AutoCAD Mechanical
- Part 2 Design and Annotation Tools
- 3 Working with Templates
- 4 Using Mechanical Structure
- 5 Designing Levers
- 6 Working with Model Space and Layouts
- 7 Dimensioning
- 8 Working with 2D Hide and 2D Steel Shapes
- 9 Working with Standard Parts
- Key Terms
- Working with Standard Parts
- Inserting Screw Connections
- Copying Screw Connections with Power Copy
- Creating Screw Templates
- Editing Screw Connections with Power Edit
- Working with Power View
- Deleting with Power Erase
- Inserting Holes
- Inserting Pins
- Turning Off Centerlines in Configurations
- Hiding Construction Lines
- Simplifying Representations of Standard Parts
- 10 Working with BOMs and Parts Lists
- 11 Creating Shafts with Standard Parts
- Key Terms
- Creating Shafts
- Configuring Snap Options
- Configuring Shaft Generators
- Creating Cylindrical Shaft Sections and Gears
- Inserting Spline Profiles
- Inserting Chamfers and Fillets
- Inserting Shaft Breaks
- Creating Side Views of Shafts
- Inserting Threads on Shafts
- Editing Shafts and Inserting Sections
- Replacing Shaft Sections
- Inserting Bearings
- Part 3 Engineering Calculations
- Part 4 Autodesk Inventor Link
- Index
DefinitionTerm
ments of inertia, therefore, depend on the location of reference
axes.
A support that prevents rotation in all axes, but allows translation
along one axis.
movable support
A force that is concentrated on a point.point force
Performing Calculations
The measurement unit for the moment of inertia is mm4 or inches4. These
are geometric values, which appear in deflection, torsion, and buckling
calculation. AutoCAD Mechanical uses the result of the moment of inertia
calculation for the deflection line calculation.
Moment of inertia calculations are performed on cross sections of beams or
on other objects that can be represented as closed contours. Calculations can
be performed on a cross section of any shape, as long as the geometry of the
cross section forms a closed contour.
AutoCAD Mechanical determines the center of gravity for a cross section,
draws the main axes, and calculates the moment of inertia about each of those
axes. You can also select a load direction for a cross section; AutoCAD
Mechanical calculates the moment of inertia and angle of deflection for that
load.
NOTE Before you perform this exercise, verify that the ISO standard part standard
is installed.
Load the initial drawing.
■ Open the file tut_calc in the Tutorial folder.
➤ Open ➤ Drawing
Ribbon
File ➤ Open
Menu
OPENCommand
286 | Chapter 13 Calculating Moments of Inertia and Deflection Lines