FAILURE MODEL FOR FIBROUS COMPOSITES USING MULTISCALE MODELING
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Authors
Darcy, Joseph
Subjects
composite failure
multiscale composite model
worldwide failure exercise
WWFE
fiber composite
finite element
progressive damage
composite degradation
multiscale composite model
worldwide failure exercise
WWFE
fiber composite
finite element
progressive damage
composite degradation
Advisors
Gordis, Joshua H.
Kwon, Young W.
Gannon, Anthony J.
Kozdon, Jeremy E.
Alley, Erick S.
Molitoris, John
Date of Issue
2018-06
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
An established multiscale model for materials is used as the basis for a failure model for fiber composites. The model’s computation is explained so that its results can be used to formulate the inputs to the failure model. The failure model proposed employs homogenization and disaggregation methods that are enabled by micro-scale modeling of the material’s constituents. This failure model is then used to define strength reductions in the composite at the micro-level. The strength reductions enable the definition of a progressive failure methodology for application to the micro-scale, and ultimately, the macro-scale composite. The failure model, the degradation model, and the multi-scale model they are based upon are combined in a computational program for inclusion in finite element software for efficient solving and prediction of intact and failed composite structural response. The model is then tested against existing experimental data as well as by experiments conducted by the author.
Type
Thesis
Description
Series/Report No
Department
Mechanical and Aerospace Engineering (MAE)
Organization
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.