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Crashworthiness design for functionally graded foam-filled thin-walled structures

机译:功能梯度泡沫填充薄壁结构的耐撞性设计

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摘要

Foam-filled thin-wall structures have exhibited significant advantages in light weight and high energy absorption and been widely applied in automotive, aerospace, transportation and defence industries. Unlike existing uniform foam materials, this paper introduces functionally graded foam (FGF) fillers to fill thin-walled structures, aiming to improve crashworthiness. In this novel structure, the foam density varies throughout the depth in a certain gradient. Numerical simulations showed that gradient exponential parameter m that controls the variation of foam density has significant effect on system crashworthiness. In this study, the single and multiobjective particle swarm optimization methods are used to seek for optimal gradient, where response surface models are established to formulate specific energy absorption and peak crushing force. The results yielded from the optimizations indicate that the FGF material is superior to its uniform counterparts in overall crashworthiness. The data has considerable implication in design of FGF materials for optimizing structural crashworthiness.
机译:泡沫填充的薄壁结构在重量轻和能量吸收高方面表现出显着的优势,并被广泛应用于汽车,航空航天,运输和国防工业。与现有的均匀泡沫材料不同,本文引入功能梯度泡沫(FGF)填料来填充薄壁结构,旨在提高耐撞性。在这种新颖的结构中,泡沫密度在整个深度上以一定的梯度变化。数值模拟表明,控制泡沫密度变化的梯度指数参数m对系统耐撞性具有重要影响。在这项研究中,使用单目标和多目标粒子群优化方法来寻找最佳梯度,在此方法中,建立了响应表面模型来制定比能量吸收和峰值破碎力。优化产生的结果表明,FGF材料在整体耐撞性方面优于其同类材料。该数据对于优化结构耐撞性的FGF材料设计具有重要意义。

著录项

  • 来源
    《Materials Science and Engineering》 |2010年第8期|1911-1919|共9页
  • 作者单位

    State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, China School of Aerospace, Mechanical and Mechatronic Engineering, Faculty of Engineering, The University of Sydney, Sydney, NSW 2006, Australia;

    State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, China;

    State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, China;

    School of Aerospace, Mechanical and Mechatronic Engineering, Faculty of Engineering, The University of Sydney, Sydney, NSW 2006, Australia;

    School of Aerospace, Mechanical and Mechatronic Engineering, Faculty of Engineering, The University of Sydney, Sydney, NSW 2006, Australia;

    School of Aerospace, Mechanical and Mechatronic Engineering, Faculty of Engineering, The University of Sydney, Sydney, NSW 2006, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    design optimization; functionally graded materials (FGM); foam-filler; multiobjective optimization; crashworthiness; response surface method; thin-wall structure;

    机译:设计优化;功能分级材料(FGM);泡沫填充剂多目标优化;耐撞性响应面法薄壁结构;

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