应用数学和力学2025，Vol.46Issue(4)：495-504,10.DOI:10.21656/1000-0887.450151
碳纤维的形状效应和界面效应对复合材料等效热弹性性能的影响
Carbon Fiber Shape and Interphase Effects on the Equivalent Thermoelastic Properties of Composites
摘要
Abstract
Carbon fiber reinforced polymer matrix composites are widely used engineering materials,and their performances directly affects the safety and reliability of engineering applications.The carbon fiber shape and interphase are considered as important factors affecting the properties of composites.Therefore,conducting in-depth research on the carbon fiber shape and interphase effects on the thermoelastic properties of composites is of significance for the optimization design and engineering application of carbon fiber composites.A representa-tive volume element(RVE)model was established with the finite element method.The internal microstructure of the composite was simulated,and the influences of different fiber volume fractions and shapes,interphase volume fractions and behaviors on the equivalent properties of fiber composites,were investigated.The results show that,the fiber shape has little effect on macroscopic longitudinal Young's modulus and the longitudinal thermal expansion coefficient of the composite,but has a great influence on transverse Young's modulus,the transverse shear modulus,the longitudinal shear modulus and the transverse thermal expansion coefficient,es-pecially with the increase of the fiber volume fraction.Longitudinal and transverse Young's moduli of the com-posite will increase with the interfacial volume fraction,while the interphase effect is manifested as a hard one,but will decrease while the interphase effect is manifested as a soft one.When the interfacial thermal expansion coefficient is less than that of the matrix,both the longitudinal and the transverse thermo-parameters of the composite will decrease with the interfacial volume fraction;but when the interfacial thermal expansion coeffi-cient is greater than that of the matrix,both the longitudinal and the transverse thermo-parameters of the com-posite will increase with the interfacial volume fraction.关键词
碳纤维复合材料/细观力学/形状效应/界面效应/热弹性性能Key words
carbon fibre composite/micromechanics/shape effect/interphase effect/thermoelastic property分类
力学引用本文复制引用
孙洋,范振杰,刘马宝..碳纤维的形状效应和界面效应对复合材料等效热弹性性能的影响[J].应用数学和力学,2025,46(4):495-504,10.基金项目
国家自然科学基金(12302266) （12302266）
陕西省自然科学基金(2021JQ-466) （2021JQ-466）
