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Question

A thin rod of 10 mm diameter is subjected to a tensile force for 7850 N. What are the principal sresses and maximum shear stress?

A
700 MPa, 50 MPa, 10 MPa
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B
100 MPa, zero, 50 MPa
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C
100 MPa, 50 MPa, 25 MPa
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D
100 MPa, zero, zero
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Solution

The correct option is B 100 MPa, zero, 50 MPa
Major principal stress =7850×4π×1024=100MPa
Minor principal stress = 0
Maximum shear stress=10002=50MPa.

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