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왕나(Na Wang),아메드 사르파라즈(Ahmed Sarfara),이상교(Sang-kyo Lee),조종두(Chongdu Cho) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
This study investigates the effect of strain rate on the compression mechanical properties of 2024 aluminum matrix composites reinforced with 40 and 50 volume fraction SiC particles (SiCp/2024AL composites) under dynamic compression. A finite element analysis software ANSYS/LS-DYNA was used to perform this analysis. Axisymmetric unit cell model used as the FEM model, in which an elastic and homogeneously SiC particle was embedded inside a viscoplastic 2024AL matrix. At various increasing strain rates ranging from 1250 to 2500/s, the flow stress kept increasing for 40 vol. % SiCp/2024AL and showed increase-decrease tendency for 50 vol. % SiCp/2024AL. The composites displayed different deformation mechanism at various strain rates. Reference past papers, it illustrated that higher particle content composites and low particle content composites appeared different mechanical behavior. A comparison between the numerical and experimental data was made and several possible reasons including assumption used to discuss the small discrepancy. Results indicate that different particle volume fraction due to different deformation mechanisms.