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dc.contributor.authorXiao, Jian
dc.contributor.authorPham, Dinh Chi
dc.contributor.authorLua, Jim Y.
dc.contributor.authorSaathoff, Caleb
dc.contributor.authorSeneviratne, Waruna P.
dc.identifier.citationXiao, Jian; Pham, Dinh Chi; Lua, Jim Y.; Saathoff, Caleb; Seneviratne, Waruna P. 2019. Composite drilling characterization and performance evaluation. 34th Technical Conference of the American Society for Composites, ASC 2019en_US
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractHole drilling is one of the most widely used operations in order to place bolts or rivets. Drilling holes in composites leads to drilling-induced defects and damages such as delamination, burr, microcracking, swelling, splintering, and fiber pullout. A reliable and effective simulation toolkit for composite drilling process is essential to capture the drilling induced damage and perform optimization of drilling parameters to achieve desired hole quality. Under this study, a combined experimental and numerical approach is developed to extract the composite response and damage distribution caused by the drilling operation for model exploration and validation. With an advanced reaction force evaluation system and the use of non-destructive inspection techniques, specimens of different configurations are drilled and post-drilling damage quantification are evaluated for validation of the toolkit. An enhanced user-defined material model is developed for the ABAQUS/explicit to simulate the time-dependent material removal process during drilling and associated damage distribution. Accounting for the effect of the shear dominant cutting during the drilling, enhanced damage models are implemented based on the use of a fiber-orientation dependent shear failure criterion coupled with a failure mechanism driven energy dissipation for the post-peak material characterization. The applicability and high-fidelity of the developed toolkit are demonstrated by comparing both the global response and local failure predictions with the testing results of quasi-isotropic coupons with a backing plate of two different configurations.en_US
dc.description.sponsorshipAFRL/RXME under the Contract of FA8650-19-P-5066 with Mr. John Crabill as our Program Manager.en_US
dc.publisherDEStech Publicationsen_US
dc.relation.ispartofseries34th Technical Conference of the American Society for Composites, ASC;2019
dc.subjectEnergy dissipationen_US
dc.subjectFailure (mechanical)wen_US
dc.subjectInfill drillingen_US
dc.subjectNondestructive examinationen_US
dc.subjectShear floen_US
dc.titleComposite drilling characterization and performance evaluationen_US
dc.typeConference paperen_US
dc.rights.holder© 2019 by DEStech Publications, Inc. and American Society for Composites. All rights reserveden_US

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