1.
Elastic modulus can only be found for materials with linear relationships.
2.
Can the elastic modulus be approximated for some materials using the 0.2% yield strength method?
3.
The elastic modulus relates stress to strain by Hooke's Law.
4.
Yielding is a type of failure.
5.
Yielding is found using the secant modulus.
6.
When there is both an upper and lower yield point for a material, the lower point should be used.
7.
No permanent deformation happens in the elastic region in tension.
8.
The elastic region always obeys Hooke's Law in tension.
9.
Materials that fail catastrophically in the elastic region (of a tensile test) are known as brittle.
10.
The elastic region has a uniform stress state in tension.
11.
There is permanent damage in the plastic region for tension
12.
For tension, Young's Modulus relates stress to strain in the plastic region.
13.
In tension there is a uniform stress state in the plastic region.
14.
In tension, brittle failures are characterized by a large change in cross sectional area.
15.
In tension, brittle failures are associated with cup-cone failures.
16.
In tension, brittle fractures fail 90 degrees in relation to the principle direction of stress.
17.
In tension, ductile fractures fail at 45 degrees to the principle direction of stress.
18.
Ductile fractures are associated with non-uniform deformation of the specimen.
19.
Ductile fractures in tension begin with triaxial states of stress.
20.
True stress is valid for the entire curve of a ductile material in tension.
21.
Aluminum has an upper and lower yield.
22.
Aluminum is a material with ductile behavior.
23.
Aluminum experiences an "orange peel" effect on deformed surfaces.
24.
Steel can have mill scale on the specimen.
25.
Steel behaves ductile in tension.