Physics, 26.06.2019 16:00 smokemicpot
On the same material as in the above problem, a fatigue loading is applied and the fatigue life is 1000 cycles. in each loading cycle, the material is first fully loaded and then fully unloaded. (a) what are the maximum stress, the minimum stress, the mean stress, the stress range (∆σ), the stress amplitude (s), and the r-raito? (b) we know that the fracture toughness of the material is 40 mpam1/2. what is the final fatigue crack length in the last loading-unloading cycle, cf? assume that the geometric factor y = 1.2.
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Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)
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In order to do work, the force vector must be question 1 options: in a different direction than the acceleration vector. in a different direction than the displacement vector. in the same direction as the displacement vector and the motion. in the same direction as the acceleration vector.
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On the same material as in the above problem, a fatigue loading is applied and the fatigue life is 1...
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