受学校国际合作与交流基金资助，航天科学与力学系聘请的美国佐治亚理工大学机械工程学院曲建民教授来我校进行讲学，本次讲学内容如下：

      题目：Interfacial Excess Energy, Excess Stress and Excess Strain in Elastic Solids

      主要内容：In this presentation, interfacial excess energy and interfacial excess stress for coherent interfaces in an elastic solid are reformulated within a continuum mechanics framework.  It is shown that the well-known Shuttleworth relationship between the interfacial excess energy and interfacial excess stress is valid only when the interface is free of transverse stresses.  To account for the transverse stress, a new relationship is derived between the interfacial excess energy and interfacial excess stress. Dually, the concept of transverse interfacial excess strain is also introduced, and the complementary Shuttleworth equation is derived that relates the interfacial excess energy to the newly introduced transverse interfacial excess strain. Such new formulation of interfacial excess stress and excess strain naturally leads to the definition of an in-plane interfacial stiffness tensor, a transverse interfacial compliance tensor, and a coupling tensor that accounts for the Poisson's effect of the interface. These tensors fully describe the elastic behavior of a coherent interface upon deformation.

时间：2007年6月27日（周三）下午2：00

地点：理学楼L417

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专家简介：

曲建民 School of Mechanical Engineering, Georgia Institute of Technology

    曲建民博士现任佐治亚理工大学机械工程学院教授。从吉林大学获得数学力学系学士学位后，曲建民教授先后在美国西北大学获得理论及应用力学的硕士和博士学位。曲建民教授的主要研究方向为：复合材料微观力学、界面力学、固体燃料电池模拟、超声波无损检测及表征等。在国际重要期刊上发表论文150多篇。

 

 

国际合作处

2007年6月26日