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Chooose best ans. (A) The %u201Cfailure%u201D in ductile materials is generally

ID: 1828309 • Letter: C

Question

Chooose best ans.

(A)  The %u201Cfailure%u201D in ductile materials is generally ____________, whereas for brittle materials, it is

______________.

Ultimate stress; yield stress

Yield stress; ultimate stress

Yield stress; fracture stress

Ultimate stress; fracture stress

(B)  Which of the failure theories for ductile materials results in the largest failure envelope?

Maximum shear stress theory

Maximum distortion energy theory

Maximum normal stress theory

Mohr%u2019s failure criterion

None of the above

(C)  Brittle materials tend to fail ___________________ compared to ductile materials.

more unexpectedly (i.e., with more variability)

at higher stresses

at lower stresses

a higher strains

None of the above

(D)  Each of the failure theories that we have covered generally involve the comparison of

_________________ to _________________.

energy; stress

primary stresses; maximum shear stress

normal stresses; shear stresses

primary stresses; limiting stresses (yield or ultimate)

None of the above

Explanation / Answer

1.Yield stress; ultimate stress

2.Maximum shear stress theory

3.at lower stresses

4.normal stresses; shear stresses

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