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Machine Design Test 1 Questions and Answers Fatigue Loading - AnswersOccurs when a structure experiences dynamic, fluctuating or variable loads Fatigue - Answersan issue in any structure that is subjected to variable loading (mechanical, pressure, or thermal); often the cause of many structure failures Fatigue Failure - Answersoccurs due to excessive dynamic, repeated, fluctuating or variable loading What is a frequent cause of catastrophic failures? Why? - AnswersFatigue Loading; ...