Question

Design of machine elements

A britle material has the properties Sut = 30 kpsi and Suc = 90 kpsi. Using the coulomb mohr and modified mohr theories , Determine thefactor or safety for the following states of plane stresses.

a) σx = 25 kpsi σy =15 kpsi

b) σx = 15 kpsi σy = – 15 kpsi

c) σx = 20kpsiτxy= -10 kpsi

d) σx = – 15 kpsi σy =10 kpsi τxy= -15 kpsi

e) σx = – 20 kpsi σy =- 20 kpsi τxy= -15 kpsi

Solutions

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