基于多尺度方法的纤维织物增强柔性复合材料拉伸模量预测

以超高分子量聚乙烯（UHMW-PE）纤维织物增强-聚乙烯（PE）涂层柔性复合材料作为研究对象，首先，通过离子抛光仪对复合材料横截面进行处理；然后，使用SEM和光学显微镜测量复合材料细观结构，获得复合材料细观几何参数；最后，基于均匀化方法和连续介质假设，建立单胞力学模型，计算单胞的拉伸载荷-应变曲线，将理论值与实验值进行比较。结果表明:基于多尺度方法的复合材料单胞力学模型所得拉伸载荷-应变曲线与实验所得曲线能较好吻合，该理论模型能够较好地预报纤维织物增强柔性复合材料的拉伸模量。 

Tensile modulus prediction on fiber fabric reinforced flexible composite based on multi-dimension method

Ultra-high molecular weight polyethylene (UHMW-PE)fiber fabric reinforced-polyethylene (PE)coat flexible composites were taken as research obj ect.Firstly,the cross-section of the composites was polished by ion polishing instrument,and then the microscopic structure of the composites was measured through SEM and optical microscope.In this way,the microscopic geometry parameters of the composites were got.Finally,based on hom-ogenization method and continuum hypothesis,mechanical model of unit cell was set up,and tensile load-strain curve of unit-cell was calculated.The theoretical values were compared with the experimental values.The results show that the tensile load-strain curve obtained by mechanical model of unit-cell of the composites based on multi-di-mension method was in good agreement with the tension load-strain curve obtained by experiment.The theoretical model is better able to predict tensile modulus of fiber fabric reinforced flexible composite.