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  • 您现在的位置:首页> 外文会议>Conference on Active Materials: Behavior and Mechanics; 20060227-0302; San Diego,CA(US) >亿博帐号注册详情

    【24h】Modeling and testing of shape memory alloy chiral honeycomb structures

    机译形状记忆合金手性蜂窝结构的建模与测试

    【摘要】Shape memory alloy honeycombs are constitute a novel set of cellular structures developed by the authors using initially centersymmetric honeycomb configurations (hexagonal ones), and pseudo-plastic Nitinol ribbons as core. Chiral honeycomb structures feature a noncentresymmetric unit cell configuration, with rotational symmetry only and in-plane Poisson's ratio equal to -1. Nonlinear unit cell FE models of these chiral honeycombs have been developed using the formulation proposed by Auricchio et al. related to pseudo-elastic and superelastic SMA materials. The numerical results are compared with experimental ones from tensile tests of chiral honeycomb samples subjected to uniaxial tensile loading at full martensite phase, and analytical results from the model proposed by Prall and Lakes on hexachiral configurations. A working prototype of a deployable antenna made out hexachiiral cells with 1-way SMA ribbon is also described.

    【摘要机译】形状记忆合金蜂窝结构是由作者使用最初的中心对称蜂窝结构(六边形)和假塑性镍钛诺金属带作为核心开发的一组新型蜂窝结构。手性蜂窝结构具有非中心对称的晶胞结构,仅具有旋转对称性,且面内泊松比等于-1。这些手性蜂窝的非线性晶胞有限元模型已经使用Auricchio等人提出的公式开发。与伪弹性和超弹性SMA材料有关。将数值结果与手性蜂窝状样品在全马氏体相下承受单轴拉伸载荷的拉伸试验的实验结果进行了比较,并与Prall和Lakes提出的六手性构型的模型的分析结果进行了比较。还描述了一种可展开式天线的工作原型,该天线由具有1向SMA带的六面体细胞制成。

    【作者】F. Scarpa;M. R. Hassan;M. Ruzzene;

    【作者单位】Department of Aerospace Engineering, University of Bristol, BS8 1TR Bristol, UK;

    【年(卷),期】2006(),

    【年度】2006

    【页码】P.61700W.1-61700W.8

    【总页数】8

    【原文格式】PDF

    【正文语种】eng

    【中图分类】TB30;

    【关键词】SMA;honeycomb;chiral;negative Poisson's ratio;deployable;FE;

    机译 SMA;蜂窝;手性;负泊松比;可展开;有限元;
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