Shape-memory alloys: Modelling and numerical simulations of the finite-strain superelastic behavior
Shape-memory alloys: Modelling and numerical simulations of the finite-strain superelastic behavior
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DOI：
10.1016/s0045-7825(96)01147-4
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发表时间：
1997-04-15
影响因子：
7.2
通讯作者：
Taylor, RL
中科院分区：
文献类型：
--
作者：
Auricchio, F;Taylor, RL
形状记忆合金（SMA）显示出传统工程中使用的材料所不具备的特征;因此，它们是创新应用的基础。目前的工作提出了一个步骤的计算工具的开发过程中使用的SMA为基础的设备的设计。为了达到这个目标，我们开发了一个本构模型，再现超弹性行为的形状记忆合金在有限的应变。对于一个等温的情况下，我们详细讨论了有限元方案内的数值实现以及算法一致的切线的形式。为了评估所提出的方法的可行性，我们模拟了一些简单的SMA典型结构的响应（单轴测试，四点弯曲测试），以及可能在不同的医疗领域具有非常高的影响的应用程序。
Shape-memory alloys (SMA) show features not present in materials traditionally used in engineering; as a consequence, they are the basis for innovative applications. The present work proposes a step toward the development of a computation tool to be used during the design of SMA-based devices. To reach this goal, we develop a constitutive model which reproduce the superelastic behavior of shape-memory alloys at finite strains. For an isothermal case we discuss in detail the numerical implementation within a finite-element scheme as well as the form of the algorithmically consistent tangent. To assess the viability of the proposed approach we simulate the response of some simple SMA typical structures (uniaxial test, four-point bending test) as well as an application with possibly a very high impact in different medical fields.