SIMULATION OF STRESS IN REINFORCEMENTS AND STRESS-STRAIN CURVE OF SiC PARTICULATE Al-2618 MATRIX COMPOSITE

Acta Metall Sin

2007, Vol. 43

Issue (8): 863-867 DOI:

Research Articles

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SIMULATION OF STRESS IN REINFORCEMENTS AND STRESS-STRAIN CURVE OF SiC PARTICULATE Al-2618 MATRIX COMPOSITE

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东北大学材料与冶金学院

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;. SIMULATION OF STRESS IN REINFORCEMENTS AND STRESS-STRAIN CURVE OF SiC PARTICULATE Al-2618 MATRIX COMPOSITE. Acta Metall Sin, 2007, 43(8): 863-867 .

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Abstract A 15v% SiC particulate reinforced Al-2618 matrix composite was selected to simulate its stress-strain curve and the stress in the reinforcing particles. The simulation was also carried out to compare a composite with soft matrix to that with hard matrix, and the necessary experimental data for the simulation were measured on specimens of the composite under different heat treatments. An analytical model was established based on Eshelby equivalent inclusion approach to do the simulation by introducing numerical secant modulus or tangent modulus scheme respectively. The same modeling work was carried out by FEM analysis based on the unit cell model using a commercial ANSYS code. Through the comparison of the results between the simulation and experimental results, it is shown that the Eshelby model can predict the stress-strain curve of the composite with both hard matrix and soft matrix by introducing different numerical modules, while the FEM model can not be used to simulate the stress-strain curve of composite with soft matrix. The stress in the particles is much higher than that in matrix shown by the simulation, which indicates that load transfer is the main strengthening mechanism for the composite.

Key words: particulate reinforcement Eshelby approach finite element analysis strength calculation property sim

Received: 26 December 2006

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