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

CMS 0408807纳米相复合材料层压板机械响应的本构建模Ken Reifsnider和Xinyu Huang全球燃料电池中心，ME部门，UCONN摘要国家开发燃料电池动力系统的主要重点是质子交换膜（PEM）电池，它使用聚合物基复合材料层压板和膜。 耐久性已被几个当前的国家研究确定为这一重要企业进步的最重要障碍，因此机械行为问题是一个重要问题。本方案将解决这一障碍的三个高风险方面。 它将首次尝试构建本构概念的完全非线性和各向异性的力学响应的离聚物膜，试图确定这样的膜的失效标准，并确定应变率依赖的失效标准，使用经典的应力断裂概念。 该计划的更广泛的影响将是消除耐用燃料电池设计的关键障碍，通过将该计划的研究结果引入康涅狄格州全球燃料电池中心教授的课程，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.