玻纤增强热塑性复合材料多尺度建模与各向同性曲线拟合  

Multiscale Modeling of Glass Fiber Reinforced Thermoplastic Composites and Isotropic Curve Fitting

作　　者：姚嫣菲[1] 章正伟[1] 徐坚 YAO Yan-fei;ZHANG Zheng-wei;XU Jian(Zhejiang Institute of communications,Hangzhou 311112,China;Zhejiang Open University,Hangzhou 310012,China)

机构地区：[1]浙江交通职业技术学院,浙江杭州311112 [2]浙江开放大学,浙江杭州310012

出　　处：《塑料科技》2021年第4期90-93,共4页Plastics Science and Technology

摘　　要：基于玻纤增强复合材料玻纤取向3D计算的Moldflow旋转扩散(MRD)模型对玻纤增强热塑性复合材料(PA66-G30)的标准1BA样条注塑填充过程中的玻纤取向张量进行计算。以14层玻纤取向张量分布和厚度数据为基础,建立该复合材料多层微观代表性体积元(RVE)模型,采用J2幂乘硬化弹塑性模型来拟合实验测试应力-应变曲线,完成该玻纤增强热塑性复合材料多尺度模型的构建。基于该材料模型生成的45°取向的应力-应变曲线与实验结果吻合良好,验证了本实验材料模型的准确性。基于该模型生成了PA66-G30材料的各向同性应力-应变曲线,用于提高注塑产品力学仿真计算的精度。The glass fiber orientation tensor of a standard injection molding 1BA spline made of glass fiber reinforced thermoplastic composite(PA66-G30)was calculated based on the 3D calculation Moldflow rotary diffusivity(MRD)model of glass fiber orientation for glass fiber reinforced composites.The multilayer microscopic representative volume element(RVE)model of the composite was established based on the 14 layer glass fiber orientation tensor distribution and thickness data.The J2 power-hardening elastoplastic model was used to fit the experimental test stress-strain curve to complete the construction of accurate multiscale model of the glass fiber reinforced thermoplastic composites.Stress-strain curve in 45 degree created with this material model is in good agreement with the experimental results,which validated the accuracy of the multiscale model.Finally,isotropic stress-strain curve was created with this PA66-G30 material based on the model to improve the accuracy of mechanical simulation calculation of injection molded products.

关 键 词：玻纤增强热塑性复合材料 旋转扩散模型 玻纤取向张量 多尺度模型 各向同性曲线 

分 类 号：TB332[一般工业技术—材料科学与工程] TU381[建筑科学—结构工程]