Mechanical Engineering Fatigue Failure and Design Quiz

In the tensile, compression, and bending tests, the intensity of the stress increases rapidly until the load finally fractures the specimen?

Components are always subjected to dynamic loads, where the stress intensity changes constantly and the direction of the stress remains constant.

The dynamic stress applied to components can be either cyclic or random.

The S-N Curve is a result obtained from the tensile test.

Components must be designed such that the applied load on the material causes permanent deformation in service application.

The strength parameters determined from tensile, compression, and bending tests are not useful for material selection and component dimensioning.

Fatigue failure occurs only under static load.

Fatigue failure is more likely to occur after a brief period of repeated stress or strain cycling.

Fatigue failure can occur when the stress in the material is purely compressive.

Fatigue failure involves significant plastic deformation before failure.

Fatigue failure is primarily found in biomedical implants.

Fatigue failure is more commonly associated with pure alternating stress cycles than repeated (alternating) stress cycles.

Fatigue failure occurs without warning.

Crankshafts are not susceptible to fatigue failure.

Fatigue failure occurs only when the stress surpasses the yield strength of the material.

Fatigue failure can occur due to thermal expansion and contraction.