U.S.-Germany Cooperative Research: Constitutive Behavior and Reliability of Ferroelectric Ceramics

9981585Lynch该奖项支持Christopher Lynch和来自佐治亚理工学院的三名学生与德国达姆施塔特工业大学机械工程系的Juergen Roedel合作。该项目将侧重于了解铁电陶瓷在电气和机械载荷下的失效机理。近年来，铁电陶瓷的应用，如轻质、快速响应的声学和振动控制装置，要求材料能够承受大应变，这使得此类材料的可靠性成为最高工程领域之一。美国小组开发了一种有限元程序，能够模拟铁电材料中的应力和电场集中；德国小组开发了实验技术和专门的设备，用于测量被研究材料的裂纹扩展行为。这次合作将把两个团队的互补优势结合在一起，这将带来设计最佳陶瓷的新能力。

9981585LynchThis award supports Christopher Lynch and three students from Georgia Tech in a collaboration with Juergen Roedel of the Department of Mechanical Engineering at the Technical University of Darmstadt, Germany. The project will focus on understanding the mechanisms of failure of ferroelectric ceramics under both electrical and mechanical loading. Recent applications of ferroelectric ceramics, such as light-weight, quick-response acoustic-and vibration-control devices require that the materials be able to withstand large strains, making reliability of such materials one of the top engineering fields. The U.S. group has developed a finite-element code capable of modeling stress and electric field concentration in ferroelectric materials; the German group has developed experimental techniques and specialized equipment for measuring the crack propagation behavior of the materials under investigation. The collaboration will bring together the complementary strengths of both groups, which should lead to new capabilities for the design of optimal ceramics.