Crashworthiness study and optimisation of free inversion foam-filled tubes under dynamic loading 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
International journal of crashworthiness
年/卷/期
2018 / 23 / 5/6
页码
605-617
ISSN号
1358-8265
作者单位
Univ Zanjan, Dept Mech Engn, Zanjan, Iran;Univ Zanjan, Dept Mech Engn, Zanjan, Iran;
作者
Mohammadiha, Omid;Ghariblu, Hashem;
摘要
The inversion processes of the proposed tubes under axial impact are simulated to investigate the detailed features of crushing process by using the explicit finite element FE code LS-DYNA. To validate the FE results, a new theoretical relation is developed . The validated FE model was then used for the parametric studies, to investigate the maximum crush distance and the effect of impact mass and the geometry parameters (i.e. wall thickness, foam density) on response of free inversion tubes under different strain rate loadings. Finally, a search algorithm combining Latin hypercube design (LHD) points and genetic algorithm is developed to carry out the multiobjective optimisation through the geometrical average method. The optimal design of the foam-filled free inversion tube demonstrates a significant improvement in the crashworthiness over the benchmark designs with the same loading conditions.
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关键词/主题词
Free inversion;foam-filled tube;crashworthiness optimisation;dynamic loading;finite element analysis;circular tube;
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