三维编织复合材料模量的双尺度有限元计算

针对三维编织复合材料的力学性能进行了双尺度有限元(TSA)数值计算，给出了计算模型和算法过程，并将数值结果与文献中的实验数据进行了比较，验证了算法的物理准确性。编织复合材料的力学性能不仅依赖于材料的基本组份，也与细观构造相关。双尺度有限元计算可以数值模拟出三维编织复合材料的整体力学性能，从而为材料的研发提供指导。本文的双尺度有限元三维数值计算方法可以推广到其他增强／孔隙等多相复合材料的数值模拟。

The two-scale analysis algorithms for the mechanical prediction of 3D braided composite materials

In this paper, the two-scale FE algorithms are presented for predicting the mechanical parameters of the composite materials with periodic configuration,and the mechanical parameters of some 3D braided composites are evaluated.The main work includes model establishing,theoretical analysis,numerical computation and result analysis. Some numerical results generated by algorithms here are compared with the results from mechanical experiments.Mechanical behaviors of braided composites depend not only on its basic composition, but also on the detailed configurations.By the numerical analysis on the basic cell models of 3D braided composites with TSA,we can obtain the preview of their macroscopic mechanical behaviors.Algorithms presented here can also be applied to other composites with small periodicity.