Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7169778 | Engineering Fracture Mechanics | 2015 | 13 Pages |
Abstract
This paper extends the double cantilever beam (DCB) model to functionally graded materials (FGMs) based on two-dimensional theory of elasticity. A theoretical approach is proposed to determine strain energy release rate of a crack in a layered FGM with exponential gradient perpendicular to the crack plane. Elasticity solutions of a functionally graded cantilever subjected to a concentrated force and a bending moment are derived for thickness-wise varying Young's modulus. Using the derived elasticity solutions, the energy release rate and stress intensity factor for an edge crack and a central crack parallel to the surface are obtained. Numerical results are given to show the influence of gradient index on fracture parameters.
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Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
P. Chu, X.-F. Li, Z.-G. Wang, K.Y. Lee,