工程材料的扰动状态本构模型(Ⅱ)——基于扰动状态概念的有限元数值模拟

DISTURBED STATE CONSTITUTION MODELS OF ENGINEERING MATERIAL (Ⅱ)——DSC-BASED NUMERICAL SIMULATION OF FINITE ELEMENT METHOD

介绍利用扰动状态概念进行的有限元数值模拟方法。阐述基于扰动状态概念有限元法的应变平均化方法、解的收敛性和单值性、解对局部化问题的适宜性及其具有避免虚假网格相关性的特点。通过实验对该有限元法的计算结果进行了验证。研究结果表明,基于扰动状态概念的有限元方法具有传统方法所无法比拟的优势。

The finite element method based on DSC is introduced. The governing equations of the relative intact state and full-adjusted state and the equations of FEM are established. The solution schemes of the equations are given. The strain average method, the convergence and uniqueness of the finite element methods based on DSC are explained. The DSC model can allow well-posedness for localization and can avoid spurious mesh dependence. The laboratory test verifies the simulated results of the computational procedures. A number of research results show that the FEM based on DSC possess an altitude advantage over the classic computational procedures.