Damage Development in Static and Dynamic Deformations of Fiber-Reinforced Composite Plates

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dc.contributor.authorHassan, Noha Mohameden
dc.contributor.committeechairBatra, Romesh C.en
dc.contributor.committeememberCase, Scott W.en
dc.contributor.committeememberHyer, Michael W.en
dc.contributor.committeememberThangjitham, Suroten
dc.contributor.committeememberInman, Daniel J.en
dc.contributor.departmentEngineering Science and Mechanicsen
dc.date.accessioned2014-03-14T20:20:55Zen
dc.date.adate2005-12-27en
dc.date.available2014-03-14T20:20:55Zen
dc.date.issued2005-12-13en
dc.date.rdate2005-12-27en
dc.date.sdate2005-12-19en
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
dc.description.degreePh. D.en
dc.identifier.otheretd-12192005-135309en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-12192005-135309/en
dc.identifier.urihttp://hdl.handle.net/10919/30171en
dc.publisherVirginia Techen
dc.relation.haspartnhassan.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectContinuum damage mechanicsen
dc.subjectInelastic behavioren
dc.subjectCompositeen
dc.subjectBlast loadsen
dc.titleDamage Development in Static and Dynamic Deformations of Fiber-Reinforced Composite Platesen
dc.typeDissertationen
thesis.degree.disciplineEngineering Science and Mechanicsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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