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The effects of matrix and interface on damage in CRP cross-ply laminates
2000 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 60, no 1, 9-21 p.Article in journal (Refereed) Published
Abstract [en]

A study has been made of the transverse cracking behavior of a series of cross-ply laminates with different matrices, fiber coatings (sizes) and fiber volume fractions. On the basis of unpublished results, a correlation was assumed between material effects on leakage pressure in pressure vessels of given stacking sequence and transverse cracking behavior in cross-ply laminates. Mechanisms for crack initiation and growth were studied by optical microscopy. The strain ai the onset of transverse cracking, epsilon(TOS), increased and the slope, K. of the curve of crack density as a function of strain decreased as the G(IC) of the matrix increased. Improved fiber/matrix adhesion and lower fiber content had similar effects. The properties of polyester-based composites were usually inferior to those of vinylester composites as a consequence of pre-existing debonds and subcritical cracks resulting from microlevel curing stresses. From observations of failure mechanisms one may infer that proof testing of pipes or pressure vessels will increase the extent of subcritical damage in the material.

Place, publisher, year, edition, pages
2000. Vol. 60, no 1, 9-21 p.
Keyword [en]
interface, transverse cracking, micromechanisms, matrix toughness, fiber content, initiated transverse failure, polymer composites, fiber, cracking, glass, prediction, tensile, parameters, fracture, behavior
Identifiers
URN: urn:nbn:se:kth:diva-19501ISI: 000084959300002OAI: oai:DiVA.org:kth-19501DiVA: diva2:338193
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Berglund, Lars A.

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