Which of the following best describes the Stephanie Saylor Foundat

Question 8 / 40: Which of the following best describes the process of fatigue for engineering materials?

A Fatigue is material corrosion that prevents further use.

B Fatigue is the failure or weakening of material caused by repeated or continued stress or loading

C Fatigue is the natural aging of material that leads to failure.

D Fatigue is the weakening of engineering materials caused by thermal cycling and the resulting
molecular rearrangements that occur.

E Fatigue is the temporary weakening of materials resulting from continued use; materials may
recover strength if random molecular rearrangements are allowed to occur during a period of
disuse.

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Explanation:

Mechanisms for fatigue may be more complex than just crack propagation under stress (but that feature is important). Fatigue is material failure from repeated or continued use.

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Mechanics I ME102

Author:

Stephanie Redfern

The Saylor Foundation

USA

Access: Public Instant Grading

Attribution: Stephanie Redfern, Ranjeet (Ron) Agarwala, and Dr. Steve Gibbs. Mechanics I. The Saylor Academy 2014, http://www.saylor.org/courses/me102/

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