首页> 中文期刊> 《航空科学技术》 >显隐式分析方法在复合材料失效分析中的应用

显隐式分析方法在复合材料失效分析中的应用

         

摘要

针对复合材料失效等准静态问题,提出了显隐式联合的求解方法:在加载前期,非线性程度较低时,采用计算效率较高的隐式求解器求解;在材料出现损伤后,非线性程度较高时,改用条件收敛的显式求解器推进计算,中间通过数据传递将材料的应力应变水平及材料损伤状态由隐式求解器传递到显式求解器。该方法在保证计算精度的前提下,兼顾了隐式与显式分析的优点,有效提高了计算效率。%Explicit-implicit analysis method was employed to solve quasi-static problems, i.e. failure analysis for composite structures. In earlier stage of loading, the nonlinearity of the whole system was not obvious, so the implicit analysis method which is much more efifcient was used to solve the nonlinear equations. While the damage of material appears, the nonlinearity of the whole system increased sharply, the explicit analysis method was implemented to replace the implicit analysis, and at the end of implicit analysis procedure ,the stresses, strains and the damage status of materials were all transferred to the explicit solver. Explicit-implicit analysis method combines the advantages of both implicit and explicit analysis, and it apparently improves the computational efifciency while the accuracy does not decrease.

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