Microstructure-based modeling of the dynamic mechanical properties of SiCp/Al composites

Mei Ni Yuan,Yan Qing Yang,Qiao Juan Gong, Chao Li, Xian Zhong Lang

SCIENCE AND ENGINEERING OF COMPOSITE MATERIALS(2016)

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Abstract
Using image processing and recognition, a microstructure-based finite element model (FEM) was established to predict the dynamic properties of SiCp/Al composites at different strain rates ranging from 200 to 14,000 s(-1). In the microstructure-based FEM, the irregular SiC particles were randomly distributed in the matrix, and its configurations did not change. The results showed that the flow stress of SiCp/Al composites with low particle volume fraction first increases and then decreases with the increasing of strain rate during the adiabatic compression. The reducing flow stress of SiCp/Al composites is caused by the inner damage and the heat softening of composites. The angular particles in SiCp/Al composites provide more strengthening effect than the circle particles when the strain is <0.62, while the circle particles provide more strengthening effect than the angular particles for strain >0.62.
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Key words
dynamic mechanical analysis,metallic composites,microstructure,simulation and modeling
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