The theory is designed for the description of elastic-plastic deformation under complex passive loading paths. Tensor and vector forms of constitutive equations are developed. A thermodynamically consistent modification of the theory is proposed. A generalization of the theory for the case of arbitrary shape of surfaces with equal compliances and the anisotropy of elastic properties is presented. Surfaces of equal compliances for multilink load paths and for complex cyclic loading with full and partial unloading are experimentally studied.
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