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本文以冲击体最大损失动能为目标函数,以纤维的方向角为设计变量,根据Hashin破坏准则并考虑四种损伤能量耗散对短纤维增强复合材料层合板的高速冲击性能进行优化.用ABAQUS有限元程序对短纤维增强复合材料层合板的高速冲击问题进行数值模拟,并采用遗传优化算法获得最优纤维方向角的布置.数值模拟及优化设计的结果表明:与传统的直线纤维增强复合材料层合板相比,合理的短纤维角度布置能有效提高复合材料层合板的抗冲击能力.研究结果可为短纤维复合材料抗冲击设计提供一定的帮助.
In this paper, the maximum loss kinetic energy of the impact body is taken as the objective function, and the orientation angle of the fiber is taken as the design variable. According to the Hashin failure criterion and considering the energy dissipation of the four kinds of damage, the high speed impact performance of the short fiber reinforced composite laminates is optimized. Element program to simulate the high-speed impact of short fiber-reinforced composite laminates and obtain the optimal orientation of fiber orientation by genetic algorithm.The results of numerical simulation and optimization design show that compared with the traditional linear fiber reinforced composite layer Compared with the plywood, the rational arrangement of short fiber angle can effectively improve the impact resistance of the composite laminates.The research results may be helpful for the impact resistance design of short fiber composites.