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Design and development of hybrid composite bistable structures for energy absorption under quasi-static tensile loading

机译：准静态拉伸载荷下混合复合双稳态吸能结构的设计与开发

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摘要

The composite bistable structures discussed in this paper consist of a material-based mechanism with a saw-tooth strain/stress curve. They have a more damage-tolerant behavior, and considerably higher strain-to-failure than the corresponding monolithic material. Past work showed successful results with bistable composites made of ultra high molecular weight polyethylene (UHMWPE). This paper investigates a number of hybrid composite configurations, with geometry and manufacturing process inspired by the previous work. Bistable designs are based on the synergy of two parts, main links and waiting links, with a user-configurable balance of strain, strength and stiffness. In this paper, carbon and UHMWPE (Spectra®) hybrids are studied in terms of their maximum strain and specific strain energy. Considerably higher ductility was experienced for some configurations, while increased strength may be obtained in principle with a higher number of layers than those of the current work.
机译：本文讨论的复合双稳态结构由具有锯齿形应变/应力曲线的基于材料的机制组成。与相应的整体材料相比，它们具有更强的抗损伤性能，以及更高的应变破坏能力。过去的工作显示了由超高分子量聚乙烯（UHMWPE）制成的双稳态复合材料的成功结果。本文研究了许多混合复合材料的配置，其几何形状和制造工艺均受到先前工作的启发。双稳态设计基于两个部分的协同作用，即主连杆和等待连杆，并具有用户可配置的应变，强度和刚度平衡。在本文中，研究了碳和UHMWPE（Spectra®）杂化物的最大应变和比应变能。对于某些构型，可观地具有较高的延展性，而原则上，与目前的工作相比，在具有更高层数的情况下可以获得更高的强度。

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  • 来源
    《Composite Structures》 |2010年第1期|p.171-178|共8页
  • 作者

    Charles Winkelmann; Samuel S. Kim; Valeria La Saponara;

  • 作者单位

    Department of Mechanical and Aerospace Engineering. University of California, Davis, CA 95616, USA;

    Department of Mechanical and Aerospace Engineering. University of California, Davis, CA 95616, USA;

    Department of Mechanical and Aerospace Engineering. University of California, Davis, CA 95616, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    bistable; composite; damage tolerance; carbon; polyethylene;

    机译：双稳态综合;破坏容忍度碳;聚乙烯;

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