U.S.-France Cooperative Research: Micromechanics of Nonlinear Composites and Polycrystals

这个为期三年的奖项为美法合作研究提供支持，旨在开发预测非线性复合材料本构行为的方法。这项合作包括宾夕法尼亚大学的Pedro Ponte Castaneda和John Bassani，以及法国马赛国家科学研究中心力学与声学实验室的Pierre Suquet研究小组。研究人员将重点研究非线性复合材料的自洽模型及其在多晶中的应用。他们还将在单晶水平上研究材料的行为，包括弹粘塑性、多滑移硬化和尺寸效应。美国研究人员在非线性均质化和晶体塑性的理论工作方面提供了专业知识。这是由马赛的实验设施和法国在数值方法方面的专业知识补充。该项目将促进对材料（如塑料和金属）变形和断裂的非线性微观机制的理解。

This three-year award provides support for US-France cooperative research aimed at the development of methods to predict the constitutive behavior of nonlinear composite materials. The collaboration involves Pedro Ponte Castaneda and John Bassani of the University of Pennsylvania and the research group of Pierre Suquet at the Mechanics and Acoustics Laboratory of the French National Center for Scientific Research in Marseille, France. The investigators will focus their research on self-consistent models of nonlinear composites and applications to polycrystals. They will also investigate material behavior at the single-crystal level, including elasto-viscoplasticity, multiple-slip hardening, and size-scale efforts. The US researchers bring to this collaboration expertise in theoretical work on nonlinear homogenization and crystal plasticity. This is complemented by experimental facilities in Marseille and French expertise in numerical methods. The project will advance understanding of nonlinear microscopic mechanisms involved in deformation and fracture of materials, such as plastics and metals.