复合材料增强铝方管耐撞性数值模拟
发布时间：2018-12-28 13:06
【摘要】：基于复合材料增强铝方管准静态轴向压溃试验结果,通过有限元仿真方法研究其耐撞性及压溃吸能特性。建立复合材料增强铝方管双层壳单元有限元模型,进行仿真分析获得其变形失效模式及载荷位移曲线等,通过与实验数据对比验证材料模型及有限元模型的准确性,并进行压溃结果分析。基于验证的有限元模型,研究薄弱环节设置、复合材料纤维铺层角度对其轴向压溃吸能特性的影响。结果表明:顶部设置圆孔薄弱环节比设置45°外倒角更能有效改善吸能特性;随着复合材料纤维铺层角度的增大,其吸能能力会随之增强。
[Abstract]:Based on the results of quasi-static axial crushing test of composite reinforced aluminum square tubes, the crashworthiness and energy absorption characteristics of composite reinforced aluminum square tubes were studied by finite element simulation method. The finite element model of composite reinforced aluminum bilayer shell element is established, and the deformation failure mode and load-displacement curve are obtained by simulation analysis. The accuracy of the material model and the finite element model are verified by comparing with the experimental data. The result of crushing was analyzed. Based on the verified finite element model, the influence of the weak link setting and the fiber layer angle on the energy absorption characteristics of the composite is studied. The results show that the weak link of circular hole at the top can improve the energy absorption more effectively than the outer chamfer of 45 掳, and the energy absorption ability increases with the increase of the fiber layer angle.
【作者单位】： 北京航空材料研究院;中国民航大学天津市民用航空器适航与维修重点实验室;
【基金】：中国民航局科技项目(MHRD20140207) 中央高校基本科研业务费中国民航大学专项项目(3122015D022) 中国民航大学天津市民用航空器适航与维修重点实验室开放基金资助
【分类号】：V214.8
本文编号：2393981
[Abstract]:Based on the results of quasi-static axial crushing test of composite reinforced aluminum square tubes, the crashworthiness and energy absorption characteristics of composite reinforced aluminum square tubes were studied by finite element simulation method. The finite element model of composite reinforced aluminum bilayer shell element is established, and the deformation failure mode and load-displacement curve are obtained by simulation analysis. The accuracy of the material model and the finite element model are verified by comparing with the experimental data. The result of crushing was analyzed. Based on the verified finite element model, the influence of the weak link setting and the fiber layer angle on the energy absorption characteristics of the composite is studied. The results show that the weak link of circular hole at the top can improve the energy absorption more effectively than the outer chamfer of 45 掳, and the energy absorption ability increases with the increase of the fiber layer angle.
【作者单位】： 北京航空材料研究院;中国民航大学天津市民用航空器适航与维修重点实验室;
【基金】：中国民航局科技项目(MHRD20140207) 中央高校基本科研业务费中国民航大学专项项目(3122015D022) 中国民航大学天津市民用航空器适航与维修重点实验室开放基金资助
【分类号】：V214.8
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