Localization in rate-dependent shearing deformation, with application to torsion testing
The localization of plastic deformation in rock is of particular interest in geology in connection with the formation of "ductile" shear zones. It is commonly conjectured that strain softening, as evidenced by a falling stress-strain curve at constant strain rate, is likely to lead to strain localization. Yet observations in torsion tests at constant twist rate fail to show such an effect. However, a more sophisticated analysis using the theory of Fressengeas and Molinari (J. Mech. Phys. Solids...[Show more]
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