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dc.contributor.advisorKwon, Young W.
dc.contributor.authorLee, James H.
dc.dateSeptember, 1996
dc.date.accessioned2013-04-30T22:07:08Z
dc.date.available2013-04-30T22:07:08Z
dc.date.issued1996-09
dc.identifier.urihttp://hdl.handle.net/10945/32260
dc.description.abstractModeling and simulation of crack initiation and propagation in solid rocket propellant materials were conducted using both the macromechanics approach and the micro/macromechanics approach. Due to their composition, the solid rocket propellant can be construed as particle reinforced composites. The macromechanics approach entailed a numerical simulation of a finite element model to predict the crack behavior based on the damage initiation, growth, and local saturation. Its results were then compared to the experimental data. In the simulation, it was assumed that a crack forms when a damage is saturated in a localized zone. The results from the simulation were quite comparable to the experimental results, validating the method of predicting crack initiation, growth, and arrest using the concept of damage growth and saturation. The second approach involved using a simplified micromechanical model and the damage mechanics being applied at the micromechanics level and the finite element analysis being done subsequently at the macromechanics level. In using this approach, the damage modes such as matrix cracking, interface debonding and particle cracking were explainable in an explicit fundamental manner. Several simulations were conducted using this approach including the cases of non- uniform particle distribution. The predicted results compared well with the experimental data.en_US
dc.description.urihttp://archive.org/details/modelingofcracki1094532260
dc.format.extentvii, 88 p.en_US
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.titleModeling of crack initiation and growth in solid rocket propellants using macromechanics and micromechanics theoriesen_US
dc.typeThesisen_US
dc.description.recognitionNAen_US
dc.description.serviceU.S. Navy (U.S.N.) authoren_US
etd.thesisdegree.nameM.S. in Mechanical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineMechanical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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