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dc.contributor.authorHassan, Noha Mohameden_US
dc.date.accessioned2014-03-14T20:20:55Z
dc.date.available2014-03-14T20:20:55Z
dc.date.issued2005-12-13en_US
dc.identifier.otheretd-12192005-135309en_US
dc.identifier.urihttp://hdl.handle.net/10919/30171
dc.description.abstractA three-dimensional finite element code to analyze coupled thermomechanical deformations of composites has been developed. It incorporates geometric nonlinearities, delamination between adjoining layers, and damage due to fiber breakage, fiber/matrix debonding, and matrix cracking. The three damage modes are modeled using the theory of internal variables and the delamination by postulating a failure envelope in terms of the transverse stresses; the damage degrades elastic moduli. The delamination of adjoining layers is simulated by the nodal release technique. Coupled nonlinear partial differential equations governing deformations of a composite, and the pertinent initial and boundary conditions are first reduced to coupled ordinary differential equations (ODEs) by the Galerkin method. These are integrated with respect to time with the Livermore solver for ODEs. After each time step, the damage in an element is computed, and material properties modified. The code has been used to analyze several static and transient problems; computed results have been found to compare well with the corresponding test results. The effect of various factors such as the fiber orientation, ply stacking sequence, and laminate thickness on composite's resistance to shock loads induced by underwater explosions has been delineated.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartnhassan.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectContinuum damage mechanicsen_US
dc.subjectInelastic behavioren_US
dc.subjectCompositeen_US
dc.subjectBlast loadsen_US
dc.titleDamage Development in Static and Dynamic Deformations of Fiber-Reinforced Composite Platesen_US
dc.typeDissertationen_US
dc.contributor.departmentEngineering Science and Mechanicsen_US
dc.description.degreePh. D.en_US
thesis.degree.namePh. D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineEngineering Science and Mechanicsen_US
dc.contributor.committeechairBatra, Romesh C.en_US
dc.contributor.committeememberCase, Scott W.en_US
dc.contributor.committeememberHyer, Michael W.en_US
dc.contributor.committeememberThangjitham, Suroten_US
dc.contributor.committeememberInman, Daniel J.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-12192005-135309/en_US
dc.date.sdate2005-12-19en_US
dc.date.rdate2005-12-27
dc.date.adate2005-12-27en_US


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