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Matrix crack initiation and progression in composite laminates subjected to bending and extension
KTH, Superseded Departments, Solid Mechanics.
KTH, Superseded Departments, Solid Mechanics.ORCID iD: 0000-0002-0307-8917
1999 (English)In: International Journal of Solids and Structures, ISSN 0020-7683, E-ISSN 1879-2146, Vol. 36, no 21, 3131-3169 p.Article in journal (Refereed) Published
Abstract [en]

An experimental investigation of matrix crack initiation and progression in glass/epoxy laminates of different stacking sequences is presented. The laminates have been loaded in extension and bending, and the degree of damage as function of the load has been recorded. The changes in certain elastic properties caused by the damage were also measured, and are compared to results from a previously developed approximate analytic model. An energy release rate resistance curve is adopted in an attempt to describe the initiation and progression of matrix cracks in the laminates. The amount of cracking is also viewed in relation to the strain transverse to the fibres in the ply under consideration, and the ply stresses at the onset of cracking are calculated. The different damage evolution criteria are compared to the experimental results, and their validity and reliability are discussed. By use of the ply strain transverse to the fibres as a critical parameter for damage evolution, the load-deformation curves of the tested laminates are simulated taking damage progression into account.

Place, publisher, year, edition, pages
1999. Vol. 36, no 21, 3131-3169 p.
Keyword [en]
Laminated composites, Glass, Epoxy resins, Crack propagation, Bending (deformation), Mathematical models, Elasticity, Strain, Stacking sequences, Energy release rate
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-25445DOI: 10.1016/S0020-7683(98)00142-5ISI: 000079819700002OAI: oai:DiVA.org:kth-25445DiVA: diva2:358499
Note
QC 20101022Available from: 2010-10-22 Created: 2010-10-22 Last updated: 2017-12-12Bibliographically approved

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Gudmundson, Peter

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