J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 957-964
Microcracks propagation in one Al/SiC under impact loadingZhong Ling1 and Leitian Shen0
1 LNM Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, PR China
Published online: 26 July 2006
Numerous microcracks propagation in one metal matrix composite, Al/SiC under impact loading was investigated. The test data was got with a specially designed impact experimental approach. The analysis to the density, nucleating locations and distributions of the microcracks as well as microstructure effects of the original composite was received particular emphasis. The types of microcracks or debonding nucleated in the tested composite were dependent on the stress level and its duration. Distributions of the microcracks were depended on that of microstructures of the tested composite while total number of microcracks in unit area and unit duration, was controlled by the stress levels. Also, why the velocity was much lower than theoretical estimations for elastic solids and why the microcracks propagating velocities increased with the stress levels' increasing in current experiments were analysed and explained.
© EDP Sciences 2006