- #1
giri
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Suppose, a mild steel bar is being pulled from both ends.The stress acting on it will be tensile in nature.There is no compressive stress on material in this situation.When the pull exceeds material's yield strength,plastic deformation and strain hardening will occur.If pulling force is increased, neck may form on middle portion of material, which may lead to material failure.Here can I consider necking process is a form of shear failure and the stress lead to necking is shear stress?