Abstract：In the rolling process of aluminum-silicon alloy, there was a problem of silicon grains stress concentration which results from the deformation resistance of silicon grain was bigger than aluminum matrix. Aiming at this problem, the finite element model of reinforcement particles is established in rolling and the stress and strain contours and curves of silicon grains and aluminum body are researched by the finite element procedures. The problem that the stress of reinforcement particles in rolling process can not be analyzed quantitatively by ordinary experiment is also solved. The results show that the strain of the aluminum matrix near the grains is greater than other parts of the Al matrix and far greater than the strain of silicon grain, which indicates the metal accumulation phenomenon appeared on the grains. The stress value of silicon grain is greater than aluminum matrix, which indicates stress concentration phenomenon appeared because of the accumulation of the metal near the grains. After the simulation, the feasibility of numerical simulation method and the accuracy of simulation results can be validated indirectly by the method of observing the feature of tensile fracture with the electron microscopy and analyze the energy spectrum.
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