Bifurcation of Steel Specimens
The failure of a steel specimen subjected to uniform tensile loading has been ascribed to plastic bifurcation. On the basis of Hill’s theory of the uniqueness and stability of solutions of elastic—plastic solids (Hill, 1958 ), Hill and Hutchinson, 1975  developed the theory on the plastic bifurcation as the direct bifurcation from a uniform state. Computational studies have also been conducted to simulate the direct bifurcation leading to shear-band formation (Tvergaard, Needleman, and Lo, 1981 ; Tvergaard and Needleman, 1984 ; Petryk and Thermann, 1992 ).
KeywordsShear Band Steel Specimen Effective Plastic Strain Diffuse Necking Secondary Bifurcation
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