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在纤维拔出理论基础上,采用有限元软件建立微元平面分析模型,模拟研究了试样沿纤维方向与沿垂直纤维方向拉伸破坏的过程,探讨了试件在两种工况下的破坏机理。在此基础上,结合以弹性力学为基础推导而成的力学参数公式,得到试件的弹性力学参数,并应用模态分析方法,证明了所得试件弹性力学参数的正确性。在试件沿纤维方向拉伸的工况下,通过改变纤维半径与树脂厚度,继而改变纤维体积分数,探讨了试件破坏应力、弹性模量与泊松比随玻璃纤维体积分数变化规律。
Based on the theory of fiber pull-out, the finite element software was used to establish the micro-plane analysis model. The process of tensile failure along the fiber direction and along the vertical fiber direction was simulated. The damage of the specimen under two conditions mechanism. On this basis, combined with the formula of mechanical parameters deduced based on elastic mechanics, the elastic mechanics parameters of the specimen are obtained. The modal analysis method is used to prove the correctness of the elastic mechanics parameters of the specimen. By changing the fiber radius and resin thickness and then changing the fiber volume fraction, the failure stress, elastic modulus and Poisson’s ratio of the specimens were investigated with the variation of glass fiber volume fraction.