首页> 外文会议>Micro-and macrostructural aspects of thermoplasticity >On the layered medium with elastic and shape memory alloy plies under various loading rates
【24h】

On the layered medium with elastic and shape memory alloy plies under various loading rates

机译:在各种加载速率下具有弹性和形状记忆合金层的层状介质上

获取原文
获取原文并翻译 | 示例

摘要

The behavior of layered structure composed of shape memory alloy (SMA) and elastic plies is investigated in the present paper. We study two modes of deformation: simple compression and simple contraction. We obtain distribution fields of state parameters (temperature, martensitic phase fraction) in the layered structure for several rates of stress controlled loading. The study is motivated by possible practical application of SMA alloys in isolation mounts. The effectiveness of the SMA material operation in these applications essentially depends on internal dissipation in the material itself. It appears that the mode of material operation in the structure is important. First we recall constitutive equations of so called R_L model of SMA materials, stipulated to be valid in the pseudoelastic range of their behavior. We formulate the relevant coupled thermo-mechanical problems for the studied modes of deformation. We solved the problems by using elaborated by the author computer code procedures being an implementation of constitutive relations into finite element code. The analysis delivers insight into SMA alloy peration in different strain states. The study of SMA alloy ply behavior may be helpful when analyzing the behavior of damping elements like washers, active control elements or cladding made of NiTi in a flow machinery.
机译:研究了由形状记忆合金(SMA)和弹性层组成的层状结构的行为。我们研究两种变形模式:简单压缩和简单收缩。我们获得了层状结构中状态参数(温度,马氏体相分率)在应力控制加载的几种速率下的分布场。这项研究是受SMA合金在隔离安装座中可能的实际应用的推动。在这些应用中,SMA材料操作的有效性主要取决于材料本身的内部耗散。看来,结构中的材料操作模式很重要。首先,我们回想一下SMA材料的所谓R_L模型的本构方程,该方程被规定在其行为的拟弹性范围内有效。我们为研究的变形模式制定了相关的热力学耦合问题。我们通过使用作者阐述的计算机代码程序解决了这些问题,该程序是将本构关系实现为有限元代码。该分析可洞悉不同应变状态下的SMA合金穿孔。在分析流动机械中的阻尼元件(如垫圈,主动控制元件或由NiTi制成的包层)的行为时,研究SMA合金层的行为可能会有所帮助。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号