Thermomechanical Behavior of Shape-Memory Single Crystals and Polycrystals

9625304翁这个项目是研究形状记忆合金的单晶和多晶版本的热力学行为。为了最大限度地利用这些材质，对它们的行为进行精确建模非常重要。因此，必须使用能够捕捉热/机械载荷下的相变的本构方程。相变本质上是热弹性的，因此由系统的热力学作用力驱动，该系统本质上是两相的。理论和实验相结合的程序将考虑三维马氏体片的形态以及相变应变的剪切和膨胀分量。***

9625304 Weng This project is to study the thermomechanical behavior in both single crystal and polycrystalline versions of shape-memory alloys (SMA). To make best use of these materials it is important that their behavior be modeled with precision. Thus constitutive equations that capture the phase transformations under thermal/mechanical loading, must be used. The phase transformations are thermoelastic in nature and are therefore driven by the thermodynamic forces of the system which is inherently a two phase one. A combined theoretical/experimental program will consider the three dimensional martensite-plate morphology as well as the shear and dilatational components of the transformation strains. ***