三维编织复合材料几何建模及弹性常数预测  

Geometric model for three-dimensional braided composites and its elastic constant forecast

作　　者：孙晓强[1] 魏高峰[1] 刘国永[1] 

机构地区：[1]山东轻工业学院机械工程学院,山东济南250353

出　　处：《山东轻工业学院学报（自然科学版）》2011年第1期41-44,58,共5页Journal of Shandong Polytechnic University

基　　金：山东省自然科学基金资助项目(Y2008A11);山东省优秀中青年科学家奖励基金资助项目(2007BS04045)

摘　　要：根据三维编织复合材料的结构特点,把整体结构分为内部单胞、表面单胞和角单胞三种类型的子单胞,考虑空间纤维束的相互扭结和挤压所造成的纤维束的弯曲和截面变形,针对每种类型的子单胞,建立了相应的几何分析模型。引入体积平均法,建立了材料的弹性性能预报模型,得到了三维编织复合材料的工程弹性常数。通过数值比较可以看出,得到的数值计算结果与实验结果吻合较好,从而验证了模型的有效性。Based on the geometrical characteristic of the yarns,geometric model for three-dimensional braided composites,which separates the unit cell into the interior unit cell,the surface unit cell and the corner unit cell,is proposed.The variation of bending characteristics and cross-sectional deformation for the yarns in a three-cell is considered.The model to predict the elastic properties is presented by averaging volume,and the elasticity constants of the material are obtained.The results show that the calculated values by the presented model well agree with the measured values.Numerical results verify the effectiveness of the model.

关 键 词：三维编织复合材料 单胞 弹性性能 工程弹性常数 

分 类 号：O340[理学—固体力学] O343.8[理学—力学]