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oai:www.ideals.illinois.edu:2142/85069 2023-07-11 col_2142_5131 col_2142_14800 com_2142_5130 com_2142_14799 com_2142_234

Geubelle, Philippe H. Kubair, Dhirendra V. 2015-09-25T22:34:18Z 2015-09-25T22:34:18Z 10000-01-01 2001 2001 The second dynamic fracture problem addressed in this thesis is concerned with the issue of intersonic crack propagation, a topic of great interest in the fracture mechanics and geophysics community with the recent first direct observations of shear cracks exceeding the shear wave speed in homogeneous brittle specimen. Special interest is placed in this study on the possibility of steady-state and transient intersonic crack motion under mixed-mode conditions. Results show that exclusive shear damage in the cohesive zone is responsible for intersonic crack propagation even though the external load comprises of both shear and tensile components. The situation is very different in the subsonic regime, where crack motion is a result of combined shear and tensile damage inside the cohesive zone. The study also provides information on the effect of mode mixity on the length of the cohesive failure zone. Made available in DSpace on 2015-09-25T22:34:18Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3023100.pdf: 7290167 bytes, checksum: 3d2c235758e7a1ba4931bf5cd28da693 (MD5) Previous issue date: 2001 Embargo set by: Seth Robbins for item 86350 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 167 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2001. http://hdl.handle.net/2142/85069 (MiAaPQ)AAI3023100 eng Applied Mechanics Cohesive Modeling of Dynamic Fracture: Rate Dependence and Intersonic Crack Motion text Aerospace Engineering Aerospace Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.