A Study on Determining Mode Components of Strain Energy Release Rate of Free-Edge Delaminations in Composite Laminates |
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| Authors: | I-G Kim I-S Kim Uda Nobuhide J-Y Kim |
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| Affiliation: | (1) Department of Aerospace Engineering, Chosun University, Gwangju, Korea, KR;(2) Department of Mechanical Engineering, Mokpo National University, Mokpo, Korea, KR;(3) Department of Aerospace Engineering, Kyushu University, Fukuoka, Japan, JP;(4) Department of Precision Mechanical Engineering, Chosun University, Gwanju, Korea, KR |
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| Abstract: | A simplified method for determining the individual mode components of the strain energy release rate of free-edge delaminations
in composite laminates is proposed. Interlaminar stresses are evaluated as an interface moment, as are interface shear forces
that are obtained from equilibrium equation of stress resultants at the interface between the adjacent layers. The deformation
of edge-delaminated laminate is calculated by using a generalised quasi-3D classical laminated plate theory developed by the
authors. The analysis provides closed-form expressions for the Mode-I, Mode-II, and Mode-III components of the strain energy
release rate by combining the deformation of the edge-delaminated laminate with the interface moment and the interface shear
forces. Comparison of the results with a finite-element analysis using the virtual crack closure technique shows good agreement. |
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| Keywords: | : Composite laminates Delamination Strain energy release rate |
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