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Geubelle, Philippe H. Klepacki, Anthony 2019-08-23T20:00:12Z 2019-08-23T20:00:12Z 2019-04-25 2019-05 A comprehensive analysis of the Interface-Enriched General Finite Element Method (IGFEM) using a modified trilinear cohesive law was performed to validate the model against experimental results showing good agreement in both initial composite stiffness and against strain measurements of the onset of transverse cracking performed on a [0/90/0] carbon/glass-epoxy laminate. Furthermore, a large dataset of realistic virtual microstructures is created from optical images of test specimens and was simulated to study the effects of microstrucutural geometric characteristics on the onset of initial cracking. Finally, a linear IGFEM formulation was implemented in the commercial finite element analysis package Abaqus through the use of common linear four-node tetrahedral elements and the User Element Library API. This implementation was verified against analytical and conforming mesh solutions. Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2019-08-22 without embargo terms The student, Anthony Klepacki, accepted the attached license on 2019-04-25 at 12:31. The student, Anthony Klepacki, submitted this Thesis for approval on 2019-04-25 at 12:44. This Thesis was approved for publication on 2019-04-25 at 17:04. DSpace SAF Submission Ingestion Package generated from Vireo submission #13827 on 2019-08-22 at 14:45:33 Made available in DSpace on 2019-08-23T20:00:12Z (GMT). No. of bitstreams: 3 KLEPACKI-THESIS-2019.pdf: 9930315 bytes, checksum: 18aaa98d1bbf5c044f94d15572ba6346 (MD5) MS_THESIS_SOURCE-KLEPACKI, ANTHONY.zip: 29884483 bytes, checksum: 6d983e0eebb75b7f0c5878f3d615e0e6 (MD5) LICENSE.txt: 4213 bytes, checksum: 312ea6eda9bc6176cd7f9bb33f9cde6b (MD5) Previous issue date: 2019-04-25 application/pdf http://hdl.handle.net/2142/104902 en 2019 by Anthony Klepacki. All rights reserved. Polymer-matrix composites, Transverse cracking, Computational mechanics, Analytical sensitivity, Carbon fiber IGFEM modeling of transverse failure in carbon-epoxy composites and implementation of the IGFEM in Abaqus FEA text text Mechanical Sci & Engineering Mechanical Engineering University of Illinois at Urbana-Champaign Thesis M.S.