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Computational modeling of damage evolution in unidirectional fiber reinforced ceramic matrix composites

Walter, M. E. and Ravichandran, G. and Ortiz, M. (1997) Computational modeling of damage evolution in unidirectional fiber reinforced ceramic matrix composites. Computational Mechanics, 20 (1-2). pp. 192-198. ISSN 0178-7675. doi:10.1007/s004660050239.

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A finite element model for investigating damage evolution in brittle matrix composites was developed. This modeling is based on an axisymmetric unit cell composed of a fiber and its surrounding matrix. The unit cell was discretized into linearly elastic elements for the fiber and the matrix and cohesive elements which allow cracking in the matrix, fiber-matrix interface, and fiber. The cohesive elements failed according to critical stress and critical energy release rate criteria (in shear and/or in tension). The tension and shear aspects of failure were uncoupled. In order to obtain converged solutions for the axisymmetric composite unit cell problem, inertia and viscous damping were added to the formulation, and the resulting dynamic problem was solved implicitly using the Newmark Method. Parametric studies of the interface toughness and strength and the matrix toughness were performed. Details of the propagation of matrix cracks and the initiation of debonds were also observed.

Item Type:Article
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URLURL TypeDescription DOIArticle
Ravichandran, G.0000-0002-2912-0001
Ortiz, M.0000-0001-5877-4824
Additional Information:© 1997 Springer-Verlag. Communicated by P. E. O'Donoghue, M. D. Gilchrist, K. B. Broberg, 6 January 1997. Supported by a Presidential Young Investigators Award from the National Science Foundation to G. Ravichandran, grant No. MSS-9157846. The authors gratefully acknowledge the Caltech Concurrent Supercomputing Facilities for providing time on the Jet Propulsion Laboratory's CRAY Y-MP2E/232.
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NSF Presidential Young Investigators AwardUNSPECIFIED
Issue or Number:1-2
Record Number:CaltechAUTHORS:20150226-105909974
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55254
Deposited By: Cheryl Gause
Deposited On:26 Feb 2015 23:32
Last Modified:10 Nov 2021 20:43

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