Which of the following is not true regarding stress analysis?
A. Stress is a critical factor in engineering designs of all types.
B. Trained designers may be able to do basic stress analyses, but critical analyses should be left for specialists.
C. Prior to being analyzed for stress, a model of a part must be broken up into a finite number of polygonal elements.
D. Stress risers are desirable to assure that parts will not fail.
Answer: D
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