multi-axial loading

设计用于拉伸/压缩和扭转加载的两轴机械测试框架将使用最先进的控制和软件进行修改，以便在工程材料的单轴或组合轴加载中精确控制和测量应力，应变和应变率。组合载荷的能力将使在制造中使用的复杂形状变化操作中观察到的以各向异性力学行为为特征的演变微观结构的新研究成为可能。对应力和/或应变状态的机械响应的耦合将用于开发变形处理建模所必需的本构关系，或产品服务中的材料行为，如汽车中使用的框架管，核工业中使用的压力管，以及用于人体骨骼置换的人造或天然材料。

A two-axis mechanical testing frame designed for tension/compression and torsion loading will be modified with the state of the art controls and software to enable precise control and measurement of stress, strain, and strain rates in single or combined axis loading of engineering materials. The ability to combine loading will enable new study of the evolving microstructure characterized by anisotropic mechanical behaviour observed in complicated shape change operations used in manufacturing. Coupling of the mechanical response to the stress and / or strain state will be used to develop constitutive relationships necessary for modelling deformation processing and, or material behavior in service of products such as frame tubes used in automobiles, pressure tubes used in the nuclear industry, and artificial or natural materials used for human bone replacement.