US-Tunisia Cooperative Research: Crack Problems in Functionally Graded Materials Under Thermo-Mechanical Loading

0080462 Keer描述：该奖项是为了支持一个合作项目，该项目由Leon Keer博士，土木工程系，西北大学，埃文斯顿，伊利诺伊州，Fazil Erdogan博士，机械工程系，利哈伊大学，伯利恒，宾夕法尼亚州和Sami El-Borgi博士，土木工程系，突尼斯理工学院，La Marsa，突尼斯。 他们计划合作研究功能梯度材料（FGM）。 目前正在探索使用由FGM制成的非均匀涂层作为高温应用中常规均匀陶瓷涂层的替代品的可能性。 这三个机构的科学家将考虑一些基准的二维裂纹问题，涉及在热和机械载荷下陶瓷-金属功能梯度材料的断裂。 目的是研究功能梯度材料非均匀性参数对裂纹驱动力的影响，以便更好地理解梯度材料的性能和设计。 两种方法将被使用，分析方法和数值方法，允许比较的结果和发展的一个忠实的数值预测capability.Scope：这个奖项将允许突尼斯和美国科学家谁拥有互补的能力和经验之间的合作。 这两位美国科学家在各自的领域都很杰出，在与这个问题相关的领域发表了大量文章。 突尼斯合作者获得了博士学位。他在美国一所著名大学任教，曾在突尼斯和美国进行研究，并因此获得了良好的出版记录。 另外两名突尼斯人，一名女科学家完成了学业，包括博士学位，第二个是博士El-Borgi博士部门的候选人将参与这项研究。 他们将首次接触到美国的研究资源和方法。 该项目为加强与突尼斯的合作提供了一种可行的手段，突尼斯与美国的互动有限，因为法语是科学家最常用的外语。 这一建议符合INT在互利领域加强国际科学合作的目标。

0080462KeerDescription: This award is for support of a cooperative project by Dr. Leon Keer, Department of Civil Engineering, Northwestern University, Evanston, Illinois, Dr. Fazil Erdogan, Department of Mechanical Engineering, Lehigh University, Bethlehem, Pennsylvania and Dr. Sami El-Borgi, Department of Civil Engineering, Polytechnic School of Tunisia, La Marsa, Tunisia. They plan to collaborate in research on functionally graded materials (FGM). The possibility of using nonhomogeneous coatings made of FGMs is currently being explored as an alternative to the conventional homogeneous ceramic coatings in high-temperature applications. The scientists at the three institutions will consider a number of benchmark two-dimensional crack problems involving fracture of ceramic-metal FGMs under thermal and mechanical loading. The objective is to study the effect of FGM nonhomogeneity parameters on the crack driving forces for the purpose of gaining better understanding on the behavior and design of graded materials. Two approaches will be used, an analytical approach and a numerical approach, to allow comparison of the results and development of a faithful numerical predictive capability.Scope: This award will permit collaboration between Tunisian and US scientists who have complementary capabilities and experience. The two US scientists are eminent in their fields and are highly published in areas related to the problem. The Tunisian collaborator received his Ph.D. at a prestigious US university and has conducted research both in Tunisia and in the United States, with a resulting strong publication record. Two other Tunisians, one a female scientist who completed her education, including a Ph.D., in France and the second a Ph.D. candidate in Dr. El-Borgi's department, will participate in this research. They will be exposed for the first time to research resources and methods in the United States. This project presents a viable means to increase collaboration with Tunisia, where interaction with the United States is limited because of the dominance of French as the foreign language most used by scientists. This proposal meets the INT objective of increasing international scientific collaboration in areas of mutual benefit.