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A micromechanical failure model for unidirectional fiber reinforced composites

Oguni, K. and Ravichandran, G. (2001) A micromechanical failure model for unidirectional fiber reinforced composites. International Journal of Solids and Structures, 38 (40-41). pp. 7215-7233. ISSN 0020-7683.

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Results from a newly developed model for failure in unidirectional fiber reinforced composites based on fracture mechanics are presented. The model is based on (i) analysis of branch crack initiation from the tip of an initial microcrack embedded in an anisotropic material, which serves as a model for the fiber reinforced composite and (ii) evaluation of anisotropy in homogenized elastic material properties and fracture toughness. Based on this model, failure envelope, dominant initial flaw orientation and failure mode for unidirectional fiber reinforced composites under a wide range of stress states are predicted. Parametric study provides quantitative evaluation of the effect of various mechanical and physical properties on the failure behavior, and their influence on strength is identified. Results from the current model are compared with those of existing phenomenological models, which show reasonable agreement.

Item Type:Article
Related URLs:
URLURL TypeDescription
Oguni, K.0000-0003-0425-9784
Ravichandran, G.0000-0002-2912-0001
Additional Information:© 2001 Elsevier Science Ltd. Received 12 December 1999; in revised form 7 July 2000. We gratefully acknowledge the support from the Office of Naval Research (Scientific Officer: Dr. Y.D.S. Rajapakse) through a grant (N0014-95-1-0453) to the California Institute of Technology.
Funding AgencyGrant Number
Office of Naval Research (ONR)N0014-95-1-0453
Subject Keywords:Failure model; Fiber reinforced composite; Micromechanics; Fracture mechanics; Failure mode
Issue or Number:40-41
Record Number:CaltechAUTHORS:20150227-113005638
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Official Citation:K. Oguni, G. Ravichandran, A Micromechanical failure model for unidirectional fiber reinforced composites, International Journal of Solids and Structures, Volume 38, Issues 40–41, October 2001, Pages 7215-7233, ISSN 0020-7683, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55337
Deposited By: Cheryl Gause
Deposited On:27 Feb 2015 21:45
Last Modified:09 Mar 2020 13:19

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