Question

A state of stress is given by: σx = −200 MPa σy = 150 MPa σxy=...

A state of stress is given by: σx = −200 MPa
σy = 150 MPa
σxy= −70 MPa

Determine the principal stresses and the maximum shear stress, as well as their orientation, using
the Mohr circle construction.
b. Explain why the engineering stress in a tension test increases from yield to ultimate and then
decreases from ultimate to fracture.

Engineering   Mechanical-Engineering   
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Answer #1

(B) The stress in tension test Increases from yield to ultimate tension to completely break the bonds of the intermittent particles and deform it plastically. Once the bonds are broken fully then the stress reduces and ultimately fracture occures.

Please dear thumpsup for the answer. Thank you.

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