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Engineering, 29.02.2020 03:28 anhekb

6.20 A machine component is loaded so that stresses at the critical location are σ 1 = 20 ksi , σ 2 = − 15 ksi , and σ 3 = 0 . The material is ductile, with yield strengths in tension and compression of 60 ksi. What is the safety factor according to (a) the maximum-normal-stress theory, (b) the maximum-shear-stress theory, and (c) the maximum-distortion-energy theory? Which theory would be expected to agree most closely with an actual test? [Partial ans.: (a) 3.0,(b) 1.71,(c) 1.97]

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