Neck development in metal/elastomer bilayers under dynamic stretchings |
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| Authors: | Zhenyu Xue John W Hutchinson |
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| Institution: | 1. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;2. School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA;1. Yangtse Chair Professor & Dept. Head Department of Engineering Mechanics Tsinghua University, Beijing 100084, CHINA;2. Allen E. & Marilyn M. Puckett Professor Division of Engineering & Applied Sciences Harvard University, Cambridge, MA 02138 |
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| Abstract: | Dynamic stretching of bilayer plates comprised of an elastomer layer bonded to a metal layer is studied with emphasis on neck development under plane strain. Neck retardation and multiple necks in the metal layer are promoted by the elastomer layer under quasi-static conditions and also by inertia in the all-metal layer under dynamic stretching. The present study explores the interaction of these two effects under the assumption that ductility is unlimited. The study reveals the roles of the elastomer modulus, the metal strength and the rate of stretching in giving rise to necking retardation. |
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