Higher-Order Beam Theories for Mode II Fracture of Unidirectional Composites

Pavan Kumar, DVTG and Raghu Prasad, BK (2003) Higher-Order Beam Theories for Mode II Fracture of Unidirectional Composites. Journal of Applied Mechanics, Transactions ASME, 70 (6). pp. 840-852.

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Mathematical models, for the stress analyses of unidirectional end notch flexure and end notch cantilever specimens using classical beam theory, first, second, and third-order shear deformation beam theories, have been developed to determine the interlaminar fracture toughness of unidirectional composites in mode II. In the present study, appropriate matching conditions, in terms of generalized displacements and stress resultants, have been derived and applied at the crack tip by enforcing the displacement continuity at the crack tip in conjunction with the variational equation. Strain energy release rate has been calculated using compliance approach. The compliance and strain energy release rate obtained from present formulations have been compared with the existing experimental, analytical, and finite element results and found that results from third-order shear deformation beam theory are in close agreement with the existing experimental and finite element results.

Item Type: Article
Subjects: AERONAUTICS > Aircraft Design, Testing & Performance
Depositing User: MS Jayashree S
Date Deposited: 07 Jan 2005
Last Modified: 24 May 2010 04:08
URI: http://nal-ir.nal.res.in/id/eprint/42

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