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Second-order strain accumulation in cyclic torsion

1965; IOP Publishing; Volume: 16; Issue: 5 Linguagem: Inglês

10.1088/0508-3443/16/5/419

2057-7656

Maria Ronay,

Metal Forming Simulation Techniques

Superpurity aluminium specimens subject to reversed cyclic torsion extend axially by accumulation of second-order plastic strain increments. These arise in quasi-isotropic strain-hardening metals because of the additional quadratic term in the stress-strain relation that is required by the condition of tensorial invariance. The phenomenon also provides the explanation for `accelerated tensile creep' by superimposed cyclic torsion.