Constitutive Modeling for Mechanical Response of Ionomer-Based Nano-Phase Composite Laminates

Ken Reifsnider和Xinyu Huang是美国康涅狄格州立大学全球燃料电池研究中心的一名研究人员，他说：“燃料电池动力系统的国家倡议主要集中在质子交换膜（PEM）电池上，这种电池使用聚合物基复合层压板和膜。耐久性已被当前的几项国家研究确定为这一重要事业进展的最重要障碍，因此力学行为问题是一个必不可少的问题。本计划将解决这一障碍的三个高风险方面。它将首次尝试构建离子膜的完全非线性和各向异性力学响应的本构概念，尝试确定这种膜的破坏准则，并使用经典的应力-破裂概念确定该破坏准则的应变率依赖性。该项目的广泛影响将是通过将项目的研究成果引入康涅狄格州全球燃料电池中心的课程，消除设计耐用燃料电池的关键障碍，从而实现可持续发展的社会。

CMS 0408807 Constitutive Modeling for Mechanical Response of Nano-Phase Composite Laminates Ken Reifsnider and Xinyu Huang Global Fuel Cell Center, ME Department, UCONN Abstract A major concentration of the national initiative to develop fuel cell power systems is focused on Proton Exchange Membrane (PEM) cells, which use polymer-based composite laminates and membranes. Durability has been identified by several current national studies as the most important barrier to progress in this important enterprise, so the question of mechanical behavior is an essential issue. The present program will address three high risk aspects of this barrier. It will make the first attempt to construct constitutive concepts for the fully nonlinear and anisotropic mechanical response of ionomeric membranes, attempt to identify a failure criterion for such membranes, and identify the strain-rate dependence of that failure criterion using classical stress-rupture concepts. The broader impact of this program will be to remove a critical barrier to the design of durable fuel cells to enable a sustainable society by introducing the findings of the program into courses taught by the Connecticut Global Fuel Cell Center.