| TIAN Xue-liang，XU Ying.Prediction of Effective Elastic Modulus for SiC Particle Reinforced Aluminium Matrix Composites[J].航空发动机,2021,47(5):92-97 |
| Prediction of Effective Elastic Modulus for SiC Particle Reinforced Aluminium Matrix Composites |
| DOI： |
| Key Words:RVE（Representative Volume Element）finite element mode SIC particle reinforced Aluminium matrix composites periodic
boundary conditions uniaxialtension boundary condition effective elastic modulus microstructure macroscopic mechanical property aeroengine |
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| Abstract:In order to analyze the influence of microstructure on macro mechanical properties for SiC particle reinforced Aluminium
matrix composite, a two-dimensional RVE（Representative Volume Element）finite element model was established to characterize the micro?
structure of A356/SiCp composite prepared by pressureless infiltration method. The relationship between the macro mechanical properties
and the microstructure of the composites was established by RVE finite element model. The effects of particle shape (circle，ellipse) and vol?
ume fraction (10%，15%，20%) on the effective elastic modulus of A356 / SiCp composites were studied under periodic boundary conditions
and uniaxial tension boundary condition，and compared with the test values of A356 / SiCp com-posites prepared by pressureless infiltra?
tion method. The results show that the prediction results under the two conditions are almost the same and the prediction error is less than
5%. The volume fraction of SiC particles has a significant effect on the mechanical properties of the composites，but has little effect on the
shape of the particles. Under the same boundary conditions and volume fraction，the difference between the predicted values of circular and
elliptical particles is not more than 0.4%. |
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