基于细观力学的短玻璃纤维/环氧树脂复合材料有效弹性模量预测  

Prediction of effective elastic modulus of short glass fiber/epoxy composites based on mesomechanics

作　　者：何宗誉 张本成 卢福聪 侯宇航 吴耀来 农立彦 HE Zongyu;ZHANG Bencheng;LU Fucong;HOU Yuhang;WU Yaolai;NONG Liyan(School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China)

机构地区：[1]广西大学土木建筑工程学院,南宁530004

出　　处：《中国科技论文》2022年第7期807-814,共8页China Sciencepaper

基　　金：国家自然科学基金资助项目(12002093);广西自然科学基金资助项目(2018GXNSFBA281199)。

摘　　要：提出一种预测短玻璃纤维复合材料在单轴拉伸作用下有效弹性模量的方法。基于改进的随机顺序吸附(random sequential adsorption,RSA)法建立了代表性体积单元(representative volume element,RVE),并使用Python脚本在ABAQUS中实现了周期性边界条件。对几种不同纤维质量分数的短玻璃纤维/环氧树脂复合材料进行单轴拉伸试验,获得了相应的宏观弹性模量。分别基于Mori-Tanaka均匀化方法和细观有限元方法预测该复合材料小应变下的有效弹性模量,并与试验结果进行对比。结果表明:细观有限元方法预测的复合材料有效模量均与Mori-Tanaka均匀化方法和试验值接近,误差低于2%,验证了RSA用于复合材料细观分析的可靠性。A method for predicting the effective elastic modulus of short glass fiber composites under uniaxial tension was presented.Based on the improved random sequential adsorption(RSA),a representative volume element(RVE)was established.The periodic boundary conditions were implemented in ABAQUS using Python scripts.Uniaxial tensile tests were carried out on several short glass fiber/epoxy composites with different fiber mass fractions,and the corresponding macroscopic elastic moduli were obtained.The effective elastic modulus of the composites under small strain was predicted based on Mori-Tanaka homogenization method and meso-finite element method,respectively,and compared with the experimental data.The results show that the effective modulus of composites predicted by the meso-finite element method is close to the Mori-Tanaka homogenization method and the experimental value,and the error is less than 2%,which verifies the reliability of RSA for meso-analysis of composites.

关 键 词：复合材料 有限元分析 细观力学 弹性模量 

分 类 号：TB332[一般工业技术—材料科学与工程]