粘塑性理論の高温非弾性解析への適用 : 有限要素法コードヘの組込みと試解析
1989 年 55 巻 518 号 p. 2097-2102
詳細
1989 年 55 巻 518 号 p. 2097-2102
The multiaxial form of the extended viscoplasticity model is given under the condition of proportional monotonic loading and is incorporated into a nonlinear finite element code by means of an initial strain technique by replacing the creep strain increment with the inelastic strain increment. The accuracy and stability of the finite element scheme is examined by comparison with numerical analysis. A structural analysis of a thick-walled cylinder of 2 1/4Cr-1 Mo steel at 600°C under internal pressure is carried out as a practical implementation of the three-dimensional viscoplasticity theory, and cpu time and stress-strain redistribution behavior are compared with those of FEM analysis by the superposition model.
