Growth of internal voids in a material

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It has been argued that the growth of internal voids in a material while it is being deformed is given by dr(σ H)dε, where is the radius of the void and (σ H) is a function of the hydrostatic stress. Explain, using this hypothesis, why ductile fracture occurs at higher effective strains in torsion than in tension.

Reference no: EM13887279

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