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首页> 外文期刊>Zeitschrift fur Angewandte Mathematik und Mechanik >Simulation of thermomechanical behavior of shape-memory alloys under multiaxial non-proportional stress [German]
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Simulation of thermomechanical behavior of shape-memory alloys under multiaxial non-proportional stress [German]

机译:形状记忆合金在多轴非比例应力下的热力学行为模拟[德国]

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摘要

The paper presents a mathematical description of polycrystalline shape memory alloys within the framework of continuum mechanism where the spatially multidimensional case is considered. A new simple model is introduced, which correctly describes not only all well-studied shape memory effects (e.g. one-way-effect, pseudo-elasticity) but also the more complex behavior (e.g. reorientation of stress-induced martensite). The key idea is a new set of internal state variables, which are averaged values for a representative volume element of the polycrystalline material. A tensor-valued variable (transformation strain tensor) describes the state of orientation of martensite. The relative volume fraction of stress induced martensite is defined by choosing a certain tensor norm of this internal variable. [References: 6]
机译:本文在考虑空间多维情况的连续介质机制的框架内,对多晶形状记忆合金进行了数学描述。引入了一个新的简单模型,该模型不仅正确描述了所有经过充分研究的形状记忆效应(例如,单向效应,拟弹性),而且还描​​述了更复杂的行为(例如,应力诱导马氏体的重新定向)。关键思想是一组新的内部状态变量,它们是多晶材料代表性体积元素的平均值。张量值变量(变形应变张量)描述了马氏体的取向状态。应力诱发马氏体的相对体积分数是通过选择该内部变量的某个张量范数来定义的。 [参考:6]

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