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对复合材料吸能结构盒段进行了耐撞性(crashworthiness)试验研究,得到吸能所关心的载荷-位移曲线,并获得相应的平均载荷、峰值载荷以及吸收总能量相关吸能参数.考虑复合材料的各向异性本构关系,对有限元软件进行了二次开发.考虑含刚度退化的Hashin失效准则对结构组件进行渐进失效数值分析讨论.基于扩展的失效准则,设置相应的渐进削弱式的薄弱环节,模拟得到了吸能评价参数平均载荷值,数值计算得到的平均载荷值为361.10 k N.并与试验结果进行了比较,其相对误差不超过7%,计算结果与试验结果取得较好一致性,表明这种方法模拟分析结构组件抗坠毁是有效可行的.
The crashworthiness of composite energy-absorbing box was studied and the load-displacement curve concerned with energy absorption was obtained, and the corresponding average load, peak load and total energy-related absorption energy absorption parameters were obtained. Material anisotropic constitutive relationship, the finite element software was developed for the second time. Considering the Hashin failure criterion with stiffness degradation, the numerical analysis of the progressive failure of structural components was discussed. Based on the extended failure criterion, the corresponding gradual weakening The average load value of energy-absorbing evaluation parameters was simulated and the average load value calculated by numerical calculation was 361.10 kN, and compared with the test results, the relative error was less than 7%, and the calculated results and test results were better Consistency shows that this method is effective and effective in simulating and analyzing structural components against crashes.