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A Finite Element Study on Constrained Deformation in an Intermetallic / Metallic Microlaminate Composite

Published online by Cambridge University Press:  10 February 2011

J. Heathcote,
G. R. Odette and
G. E. Lucas
J. Heathcote
Affiliation:
Materials Department, University of California, Santa Barbara, CA 93106, johnh@engineering.ucsb.edu
G. R. Odette
Affiliation:
Department of Mechanical Engineering, University of California, Santa Barbara, CA 93106
G. E. Lucas
Affiliation:
Department of Mechanical Engineering, University of California, Santa Barbara, CA 93106
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Abstract

The mechanical properties of intermetallic / metallic microlaminates were studied by determining the fundamental composite properties that control the fracture behavior: namely, the stress-displacement functions of the metal layers. Finite element methods were used to model the stress-displacement function of a constrained metal layer and to examine the effect of constituentproperties, residual stress, offset cracks in adjacent intermetallic layers, and debonding inclusions in the metal layer. Finally, FEM models representative of four specific microlaminates weredeveloped and the results were compared to experimentally determined σ(u)'s for those composites. Determining these fundamental composite properties and showing how they control the mechanical behavior gives insight into the optimum design of this composite system.

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