2008

Table Of Contents
Key Terms
DefinitionTerm
A curve representing the vertical displacement of different points along the
member subjected to a load.
deflection line
The moment of all forces that act on the member to the left of a section (a point
along the member where bending moment needs to be calculated) taken about
the horizontal axis of the section.
bending moment
Safety to endurance or fracture under repetitive cycles of loads.fatigue factor
A support that prevents translation as well as rotation about all axes.fixed support
Any of several arrangements in a machine, especially toothed wheels, that allow
power to be passed from one part to another to control the power, speed, or
the direction of movement.
gear
The forces and moments that act on a part.load
A support that prevents translation as well as rotation about all axes.movable support
A change of cross section, such as an undercut, groove, hole or shoulder. A
notch leads to higher stress in the part. The flux of the stress is interrupted or
redirected.
notch
A force that is concentrated on a point.point force
A summary term for all forces and moments, thus loads and stress, which act
on a part.
strength
Force or pressure on a part. Stress is the force per unit area.stress
Safety to the stress beyond which the material exhibits permanent deformation.yield point
300 | Chapter 14 Calculating Shafts