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

CMS 0408807纳米相复合材料层合板力学响应本构模型美国康涅狄格州ME系黄新宇全球燃料电池中心开发燃料电池动力系统的国家计划主要集中在质子交换膜电池上，这种电池使用聚合物基复合材料层合板和膜。耐久性已经被当前几个国家的研究确定为在这一重要企业中取得进展的最重要的障碍，因此力学行为问题是一个重要的问题。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聚膜的完全非线性和各向异性机械响应的本构概念，尝试确定此类膜的破坏准则，并使用经典的应力破裂概念来确定该破坏准则的应变率相关性。该计划的更广泛影响将是通过将该计划的发现引入康涅狄格州全球燃料电池中心教授的课程，消除耐用燃料电池设计的关键障碍，以实现可持续社会。

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.