One-Dimensional Numerical Analysis of a Bar Subjected to Longitudinal Impulsive Loading : Using an Elastic-Plastic-Viscoplastic Constitutive Equation

概要

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A tensile elastic-plastic-viscoplastic constitutive equation is proposed, where the concepts of understress and overstress are introduced. The strain-rate dependence and the high-strain-rate dependence of stress are shown using the proposed constitutive equation. An equation is given describing propagation speed of an elastic-plastic-viscoplastic stress wave, and the strain dependence and strain-rate dependence of this speed. One-dimensional numerical analysis of a bar subjected to longitudinal impulsive loading under constant particle velocity loading conditions is carried out using the proposed constitutive equation. Results indicate the attenuation of the constant particle velocity with distance in the particle velocity-time plane, the existence of the strain plateau and changing of the plateau with time in the strain-distance plane, the existence of constant strain and the attenuation of constant strain with distance in the strain-time plane, and the maximum value of stress at the impact end and its decrement with time in the stress-time plane.
一般社団法人日本機械学会の論文
1993-04-15