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Title: Delaminations at the free edge of a composite laminate
Authors: Amrutharaj, G.S.
Lam, K.Y. 
Cotterell, B.
Keywords: Angle ply laminates
Fracture process zone
Issue Date: 1996
Citation: Amrutharaj, G.S., Lam, K.Y., Cotterell, B. (1996). Delaminations at the free edge of a composite laminate. Composites Part B: Engineering 27 (5) : 475-483. ScholarBank@NUS Repository.
Abstract: The concept of a fracture process zone where damage takes place is used to analyse the delaminations at the free edges of angle ply laminates under uniaxial tension. The use of a fracture process zone removes the singularity in the interlaminar stresses and enables the initiation and growth of delaminations to be modelled for a perfect laminate without any assumed prior defects. Two different models for the stress-displacement relationship in the fracture process zone are examined: a constant stress up to critical displacement and a linear relationship. Finite element analysis shows that there is little difference in the predictions obtained from the two models. An approximate analysis is presented for the constant stress stress-displacement model which is shown to agree with a finite element solution and experimental data. Hence it is argued that the approximate method using a constant stress model for the fracture process zone is sufficient for accurate prediction of delaminations. Copyright © 1996 Elsevier Science Limited.
Source Title: Composites Part B: Engineering
ISSN: 13598368
DOI: 10.1016/1359-8368(96)00015-7
Appears in Collections:Staff Publications

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