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Journal of Composite Materials
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0021998305057432v1
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Numerical Investigation of Progressive Damage and the Effect of Layup in Notched Tensile Tests

Stephen R. Hallett

Department of Aerospace Engineering, University of Bristol, University Walk, BS8 1TR, UK stephen.hallett{at}bristol.ac.uk

Michael R. Wisnom

Department of Aerospace Engineering, University of Bristol, University Walk, BS8 1TR, UK

This article presents results from a new approach to the finite element modeling of notched damage in composite materials using interface elements to model intra- and interply damage. The technique is used to examine and predict the failures observed in tensile, double edge-notched specimens using four different layups made up from glass/epoxy prepreg. Owing to the detailed modeling of the individual damage modes, their interaction is well characterized. The analytical results obtained compare well with detailed test observations, capturing delamination and intraply splitting. By including the subcritical damage that occurs at the notch tip in the model, the stress singularity is removed and failure criteria can be used to predict ultimate ply failures.

Key Words: notched strength • progressive damage • finite element analysis • interface element

This version was published on July 1, 2006

Journal of Composite Materials, Vol. 40, No. 14, 1229-1245 (2006)
DOI: 10.1177/0021998305057432
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T.E. Tay, G. Liu, V.B.C. Tan, X.S. Sun, and D.C. Pham
Progressive Failure Analysis of Composites
Journal of Composite Materials, September 1, 2008; 42(18): 1921 - 1966.
[Abstract] [PDF]