首页|Effect of Matrix Hardening on Tensile Strength of Alumina-Fiber Reinforced Aluminum Matrix Composites
Effect of Matrix Hardening on Tensile Strength of Alumina-Fiber Reinforced Aluminum Matrix Composites
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Trans Tech Publications Ltd
This paper examines the stress distribution around a fiber break in alumina-fiber reinforced aluminum matrix (Al_2O_3/Al) composites using finite element analysis and predicts the tensile strength using tensile failure simulations. In particular, we discuss the effect of the matrix hardening on the tensile failure of the Al_2O_3/Al composites. First, we clarify the differences in the stress distribution around a fiber break between an elastic-perfect plastic matrix and an elastic-plastic hardening matrix using finite element analysis. Second, the procedure for simulating fiber damage evolution in the Al_2O_3/Al composites is presented. The simulation incorporates the analytical solution for the axial fiber stress distribution of a broken fiber in the spring element model for the stress analysis of the whole composite. Finally, we conduct Monte Carlo simulations of fiber damage evolution to predict the tensile strength of the Al_2O_3/Al composites, and discuss the effect of matrix hardening on the tensile strength of the Al_2O_3/Al composites. Coupled with size-scaling analysis, the simulated results express the size effect on the strength of the composites, which is seen in experimental results.
metal matrix compositealumina fiberaluminum matrixplastic deformationtensile failure simulation
T. Okabe、M. Nishikawa、N. Takeda、H. Sekine
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Department of Aerospace Engineering, Tohoku University, 6-6-01 Aoba-yama, Aoba-ku, Sendai, 980-8579, Japan
Department of Advanced Energy, The University of Tokyo, c/o Transdisciplinary Sciences Bldg. 311 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8561, Japan
NETL
NSTL
Trans Tech Publications Ltd
