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Maximizing Strength of Bimaterial Interfaces

[+] Author Affiliations
P. Nasiri, Gary F. Dargush

University at Buffalo, State University of New York, Buffalo, NY

Paper No. IMECE2013-65388, pp. V009T10A017; 5 pages
  • ASME 2013 International Mechanical Engineering Congress and Exposition
  • Volume 9: Mechanics of Solids, Structures and Fluids
  • San Diego, California, USA, November 15–21, 2013
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5638-3
  • Copyright © 2013 by ASME


Bi-material interfaces are prevalent in a broad range of natural and man-made components and systems. Failures often occur on the interface at a free edge, especially when the corresponding linear elastic solution exhibits a singularity in stress, which depends upon the material properties and the included angles of the two material bodies. In this paper, we combine finite element analysis and a compact self-organizing cellular automata-based genetic algorithm for topology optimization of the bi-material system. The objective is to eliminate stress singularities and furthermore to reduce peak interface stresses. The developed algorithm is applied to a simple bi-material plate in an attempt to maximize strength through geometric design.

Copyright © 2013 by ASME



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