A field engineer is checking a load applied instantly from zero height. Which technical note should be accepted? Avoid the common trap that maximum stress is half the corresponding static stress.
Choose the correct answer
maximum stress is four times static stress for all materials
stress is unaffected by loading rate
maximum stress is half the corresponding static stress
maximum stress is twice the corresponding static stress
Correct Answer
D. maximum stress is twice the corresponding static stress
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For a suddenly applied load, energy balance gives twice the static deflection and stress. Correct option: D.
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