Molecular dynamics based cohesive zone law for describing Al-SiC interface mechanics

CR Dandekar and YC Shin, COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 42, 355-363 (2011).

DOI: 10.1016/j.compositesa.2010.12.005

Molecular dynamics simulations are carried out to parameterize and obtain a traction-separation law for a ductile-brittle interface in tensile and shear loadings at high temperatures. Traditionally the interface is characterized by a cohesive zone model (CZM) with the traction-separation law assumed or parameterized through experiments. The experimental determination of the shape of the CZM has proved to be difficult. In this study a traction-separation law is thus obtained for an aluminum-silicon carbide composite system by conducting molecular dynamics simulations. The generated parameterized traction-separation law is then input into a finite element model to predict the stress- strain response of the metal matrix composite under high strain rate loading and compared with experimental results. (C) 2010 Elsevier Ltd. All rights reserved.

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