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Prediction of Compressive Strength of Carbon–epoxy Laminates Containing Delamination by Using a Mixed-mode Damage Model by M.F.S.F de Moura; J.P.M Gonçalves; A.T Marques; P.M.S.T de Castro is a Engineering article available to read on EtoBox.

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It is well known that composite laminates are easily damaged by low-velocity impact. The internal delaminations can drastically reduce the compressive strength of laminates. In this study, a numerical analysis for predicting the residual compressive strength of delaminated plates is proposed. The delaminated interfaces are modelled by using interface elements connecting the three-dimensional solid elements modelling the composite layers. Delamination propagation is modelled by using a damage model based on the indirect use of fracture mechanics. Due to the complex stress state of the problem, a mixed-mode analysis including the three modes of fracture was considered. Experimental studies were performed on carbon±epoxy [0 4 , 90 4 ] s and [90 4 , 0 4 ] s laminates. They included low-velocity impact tests, followed by X-ray damage characterisation and compression tests. Good agreement between experimental and numerical analysis was obtained.

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Author

M.F.S.F de Moura; J.P.M Gonçalves; A.T Marques; P.M.S.T de Castro

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0263-8223)

Published

2000

Language

EN

Field

Engineering (Physical Sciences)