关键词: 局部化, 应变率, 本构模型, 有限元方法, 破坏

Abstract: Finite element strain localization analyses of strain rate, history and temperature dependent material like asphaltic concrete were conducted. The theory of rate-dependent consistent plasticity was chosen as the most suitable material for constitutive framework in modeling the nonlinear response of rate-dependent material. With this model, mesh sensitivity issue for strain localization simulation was demonstrated by means of one-dimensional bar compression test. The asphaltic concrete, as a typical rate-dependent material, was chosen for the finite element analysis. A one-dimensional asphalt concrete bar subjected to dynamic compression load with different numbers of elements was examined. It was found that the independence due to the strain-rate-dependent characteristics within the model mesh can be ensured. The contribution of the model on the formation of localization within the semi-circular bending (SCB) test is presented in detail.