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Permanent link (DOI): https://doi.org/10.7939/R3JM82

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The Essential Work of Fracture Method Applied to Mode II Interlaminar Fracture in Fiber Reinforced Polymers Open Access

Descriptions

Other title
Subject/Keyword
Fiber Reinforced Polymers
Interlaminar Fracture Toughness
Mode II Fracture
Cohesive Zone
Essential Work of Fracture
Composite Materials
Iosipescu
Finite Element
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
McKinney, Scott D
Supervisor and department
Jar, Ben (Mechanical Engineering)
Examining committee member and department
Jar, Ben (Mechanical Engineering)
Duke, Kajsa (Mechanical Engineering)
Adeeb, Samer (Civil and Environmental Engineering)
Department
Department of Mechanical Engineering
Specialization

Date accepted
2013-01-31T14:26:49Z
Graduation date
2013-06
Degree
Master of Science
Degree level
Master's
Abstract
This thesis presents a new method for determining mode II interlaminar fracture toughness in fiber reinforced polymers (FRP) using the essential work of fracture (EWF) method. Fracture tests were performed on a tabbed double edge notched shear (DENS) specimen, made from a unidirectional glass/epoxy laminate, in an Iosipescu fixture. The EWF in mode II was found to agree with the GIIc for fracture initiation value from an ENF test. A finite element model was used to determine mechanisms involved in the DENS specimen. Interlaminar fracture was simulated using cohesive elements and the unstable crack growth path was simulated using the Riks arc length method. The numerical results closely match the empirical results. The model reveals that even though the EWF could be found using the conventional linear extrapolation, elastic strain energy, rather than the usual plastic energy, is the dominant geometry dependent property.
Language
English
DOI
doi:10.7939/R3JM82
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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