Non-linear mechanical response of various metals. IV. Swift effect in relation to the stress-strain behaviour and fracture in simple compression and torsion

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Abstract
For pt.III see ibid., vol.10, p.553 (1977). The Swift effect has been considered in relation to the thin-walled tube approximation. It is shown that the thin-walled tube approximation allows the parameters appearing in a particular incremental-type constitutive equation for an isotropic incompressible strain-hardening elastic-plastic solid with large deformation to be evaluated directly from measurements of the Swift effect. These parameters, evaluated directly from experiment, are shown to yield a much improved correlation of the stress-strain measurements made separately in simple compression and simple torsion. The Swift effect has been considered in relation to the fracture of various metals twisted in simple torsion.