US-Czech Engineering Research on Inelastic Behavior of Materials

这个由匹兹堡大学的K. R. Rajagopal和捷克技术大学的Jan Kratochvil合作的美国-捷克研究项目的主要目标是发展一个统一的理论和连贯的模型，可以解释固体材料中的一系列非弹性现象。具体来说，研究人员打算解决微观结构的细节及其对身体机械性能演变的影响，这可能具有不止一种无应力结构。在此过程中，研究人员计划将他们的实验观察结果纳入该理论：1)位错结构和由这种位错结构引起的非局部效应；2)基于应变空间“路径长度”测度的应力“褪色记忆”；3)最大限度的耗散。他们的发现将有助于我们理解力学的基本物理性质，并产生有利于当前技术的结果，因为金属或聚合物等材料的非弹性存在持续的制造和基础设施问题。该机械工程研究项目通过使美国和东欧的领先专家在共同感兴趣和能力的领域结合互补的人才和集中研究资源，实现了推进基础科学知识的计划目标。？?

INT 9515470 Rajagopal The primary objective of this U.S.-Czech research project between K. R. Rajagopal of the University of Pittsburgh and Jan Kratochvil of the Czech Technical University is to develop a unified theory and coherent model that can explain a range of inelastic phenomena in solid materials. Specifically, the researchers intend to address the details of microstructure and their impact on the evolution of mechanical properties in a body, which may possess more than one stress-free configuration. In the process, the researchers plan to incorporate in this theory their experimental observations concerning: 1) dislocation structures and non-local effects due to such dislocation structures; 2) "fading memory" for stress based on a "path length" measure in strain space; and 3) maximized dissipation. Their findings should contribute to our understanding of the basic physical properties of mechanics and yield results that can benefit current technology where inelasticity in materials such as metals or polymers presents persistent manufacturing and infrastructural problems. This mechanical engineering research project fulfills the program of objective of advancing basic scientific knowledge by enabling leading experts in the United States and Eastern Europe to combine complementary talents and pool research resources in areas of mutual interest and competence. ??