Numerical Simulations of Micromechanical Properties of Al Alloy/SiC Hollow Sphere Syntactic Foams Composites

Abstract:

The micromechanical properties of a Al alloy/SiC hollow sphere syntactic foams composite material have been studied using the Solidwork simulation code applied the finite element method (FEM). The simulated results have shown that the values of quasi-static compressive strength, plateau stress, and densification strain are 175 MPa, 120 MPa and 0.50, respectively. The general trend of dynamic stress–strain graphs is similar to quasi-static compression graphs. The compressive properties of the composite are not strain rate sensitive. The simulated peak strength value is ≈140 MPa. Al matrix and SiC hollow sphere exhibit different mechanical behaviour. The ultimate stress is found near the interface of composites. The failure initiates by the fracture of weak particles, some of the cracks can propagate to the matrix as well. Shear band formation in the matrix and shearing of SiC_hs lead to the major failure activity.

• Periodical: Applied Mechanics and Materials (Volumes 365-366)
• Pages: 1054-1057
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.365-366.1054
• Online since: August 2013
• Authors: Zheng Jie Lu, Han Long Wei, Shu De Liao, Sen Kai Lu
• Keywords: Al Alloy/SiC_hs Composite, Finite Element Method (FEM), Micromechanical Properties

References

[1] S. S Qin, Metal–matrix Composites for Marine Applications: Development Status and Our Countermeasures, Material Journa. 7(10) (2003) 68-70.

[2] Jiang L, Jiang Y L, Yu L, Thermal analysis for brake disks of SiC/6061 Al alloy co-continuous composite for CRH3 during emergency braking considering airflow cooling Trans, Nonferrous Met. Soc China. 22 (2012) 2783-2791.

DOI: 10.1016/s1003-6326(11)61533-1

[3] Jiang L, Jiang Y L, Yu L, Experimental study and numerical analysis on dry friction and wear performance of co-continuous SiC/Fe−40Cr against SiC/2618 Al alloy composites Trans, Nonferrous Met. Soc China. 22 (2012) 2913-2924.

DOI: 10.1016/s1003-6326(11)61550-1

[4] L. Yu, Y. L. Jiang, S. K. Lu, K. Luo, H. Q. Ru, Numerical simulation of brake discs of CRH3 high-speed trains based on Ansys, Proceedings of the 1st World Congress on Integrated Computational Materials Engineering, George Spanos, Pennsylvania, (2011).

DOI: 10.1002/9781118147726.ch25

[5] L. Yu, Y. L. Jiang, S. K. Lu, H. Q. Ru, M. Fang, FEM for brake discs of SiC 3D continuous ceramic reinforced 7075 aluminum alloy for CRH3 trains applying emergency braking, Applied Mechanics and Materials. 120 (2012) 51-55.

DOI: 10.4028/www.scientific.net/amm.120.51

[6] S. Wang, H. Geng, Y. Wang, H. Hui, Model of compressive strength of DNSRMMCS, Acta Material Composite. 23 (2006) 7-11.

[7] Dung D. Luong, Oliver M. Strbik III, Vincent H. Hammond, Nikhil Gupta, Kyu Cho, Development of high performance lightweight aluminum alloy/SiC hollow sphere syntactic foams and compressive characterization at quasi-static and high strain rates, Journal of Alloys and Compounds. 550 (2013).

DOI: 10.1016/j.jallcom.2012.10.171