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题目：Interaction of A Dynamic Crack With an Interface in Glass

报告人：Prof. Weinong Chen，School of Aeronautics and Astronautics, Purdue University, USA

时间：12月16日（周五）下午1:30-3:00
地点：力学楼434会议室
主持人：方岱宁教授

Abstract. Impact experiments are conducted to investigate the interaction of a single dynamic crack with a perpendicular interface in a glass sheet. A foam projectile impacts on a notched glass sheet having an interface normal to the impact axis. A single crack initiates by the dynamic impact loading and propagates into the interface. Experimental results show that behavior of the crack/interface interaction depends on the interfacial properties. The crack stops if the interface has no adhesive. The crack passes through the interface if it has a very thin layer of adhesive. The crack branches into multiple cracks if the interface has a layer of adhesive with a finite thickness. The crack is arrested at the interface if the glass surface across the adhesive layer has a high quality. Peridynamics is used to model the impact event and numerically simulate the crack interaction with the interface.

Biography:.Dr. Weinong Chen is Professor and Associate Head of the School of Aeronautics and Astronautics at Purdue University in West Lafayette, Indiana. He is also a Professor of Materials Engineering. He received his BS and MS degrees from Beihang University in 1982 and 1985, respectively; and Ph.D. in Aeronautics from California Institute of Technology in 1995. His research interests are in novel dynamic experimental technique development for impact responses of materials. He is a Fellow of the American Society of Mechanical Engineers, and an Associate Fellow of the American Institute of Aeronautics and Astronautics. He is a member of the United States National Committee on Theoretical and Applied Mechanics.