Title: Numerical simulation on the impact resistance of functionally graded materials

Authors: Jiangtao Zhang; Mei Zhang; Pengcheng Zhai; Lisheng Liu; Huiji Shi

Addresses: Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China. ' Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China. ' Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China. ' Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China. ' Key Laboratory for Applied Mechanics of Ministrator of Education, Tsinghua University, Beijing 100084, China

Abstract: The stress wave propagation and damage evolution within the sandwich structure of ceramic faceplate/Functionally Graded Materials (FGMs) interlayer/metal backplate are numerically studied in this paper. The microstructure models of FGM interlayer are constructed by introducing a new algorithm based on Voronoi discretisation. Four typical microstructure models of FGM interlayer with different composition gradient are constructed to analyse the effect of composition gradient of FGM interlayer on the stress wave propagation and damage evolution in the sandwich structures under impulse loading. The results demonstrate that the composition gradients of FGM interlayer significantly affect the stress propagation and damage evolution in the sandwich structures. The unidirectivity of stress wave in these models varies with the variation of composition gradient, and a slow variation of composition gradient is helpful for reducing the stress on the surface of backplate.

Keywords: functionally graded materials; microstructure; impulse loading; stress waves; damage evolution; impact resistance; wave propagation; sandwich structures; ceramics.

DOI: 10.1504/IJMPT.2011.044917

International Journal of Materials and Product Technology, 2011 Vol.42 No.1/2, pp.87 - 97

Published online: 07 Mar 2015 *

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