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Effect of neighboring fibers on energy release rate during fiber/matrix debond growth
LuleƄ University of Technology.
RISE, Swerea, Swerea SICOMP.
2014 (English)In: 16th European Conference on Composite Materials, ECCM 2014Conference paper, Published paper (Refereed)
Abstract [en]

In this paper fiber/matrix interface debond growth in unidirectional composites subjected to mechanical tensile loading is analyzed using fracture mechanics principles of energy release rate (ERR). The objective of the present study is to analyze the effect of neighboring fibers on the ERR. 5-cylinder axisymmetric FEM models with adjustable inter-fiber distance were used for ERR calculations. The results show that the ERR slightly increases with the inter-fiber distance in the case of long debonds. For short debonds, however, because the stress-state is more complex, it was found that the debond propagates in a mixed Mode I and Mode II and contribution of each mode to the ERR depends on the actual debond length. It was found that for very small debond lengths ERR significantly increases with the inter-fiber distance.

Place, publisher, year, edition, pages
European Conference on Composite Materials, ECCM , 2014.
Keyword [en]
Debonding, Energy release rate, FEM modeling, Fiber breaks
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-13072Scopus ID: 2-s2.0-84915745571ISBN: 9780000000002 (print)OAI: oai:DiVA.org:ri-13072DiVA: diva2:973268
Conference
16th European Conference on Composite Materials, ECCM 2014
Available from: 2016-09-22 Created: 2016-09-22Bibliographically approved

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