ENME 220 Final Flashcards
True or False:
The stress state (compression or tension) of a material point can be fully represented by one force vector per unit area.
False
True or False:
Poisson’s effect will result in a normal strain in the lateral direction if the material is subjected to an axial force.
True
True or False:
Poisson’s effect will result in a normal stress in the lateral direction if the material is subjected to an axial force.
False
Results in normal strain, not stress
True or False:
Strain has the same units as length.
False
strain is unitless
True or False:
Stress is always represented on a stress element.
True
True or False:
Plastic deformation is reversible
False
Inelastic deformation is reversible
True or False:
The shear stress state in the figure is impossible
True
True or False:
Shear strain is used to quantify the changes of length in materials.
False
Strain measures angular change
True or False:
Thermal expansion will cause a non-zero stress if the material can freely expand.
False
Keyword “freely”
True or False:
If materials deform, there must be a non-zero stress.
False
Free expansion happens without stress
True or False:
Prismatic bar formula can be applied to inelastic materials.
False
Only linear elastic materials
True or False:
For uniaxially loaded members, the stress is constant in the cross section.
True
True or False:
In torsion, twisting angle is constant along the axis of a prismatic bar.
False
Depending on location of force, twisting angle will differ along the bar
True or False:
In torsion, the stress is constant in the cross section.
False
True or False:
In torsion, the internal torque is created by shear stresses.
True
