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首页> 外文会议>Third World Conference on Structural Control Vol.1 Apr 7-11, 2002 Como, Italy >Some Tools for Modelling Shape Memory Alloys. Thermomechanical Behaviour and Some Efficient Use
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Some Tools for Modelling Shape Memory Alloys. Thermomechanical Behaviour and Some Efficient Use

机译：一些用于形状记忆合金建模的工具。热力学行为和一些有效利用

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摘要

The behaviour of shape memory alloys is associated with a solid-solid phase transition from a parent phase called austenite (a) to a produced phase called martensite (m)and its modelling is strongly related to the definition of a specific coherency energy. In the absence of a good knowledge about the nucleation and growth of martensite into austenite leading to the exact form of this energy, it can be helpful to use a plasticity-like phenomenological modelling. Following the notion of "constrained equilibrium", such a modelling is proposed in this paper. It is based on an assumed but never explicitly defined non-convex specific free energy function and two independent normal dissipative processes. The evolution laws of the phase transition are derived in the particular case of pseudo-elasticity by extension of the principle of maximum dissipation. This modelling is also able to take account for the history dependence of shape memory alloys behaviour.
机译：形状记忆合金的行为与从称为奥氏体（a）的母相到称为马氏体（m）的生成相的固-固相变有关，并且其建模与特定相干能的定义密切相关。在缺乏关于马氏体成核和长成奥氏体并导致这种能量确切形式的充分了解的情况下，使用类似可塑性的现象学模型可能会有所帮助。遵循“约束平衡”的概念，本文提出了这种模型。它基于一个假定但从未明确定义的非凸比自由能函数和两个独立的正常耗散过程。通过扩展最大耗散原理，在伪弹性的特殊情况下，得出了相变的演化规律。该建模还能够考虑形状记忆合金行为的历史依赖性。

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