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Crack-Tip Shielding in Particulate Composites Undergoing Damage

Ravichandran, G. and Liu, C. T. (1998) Crack-Tip Shielding in Particulate Composites Undergoing Damage. Engineering Fracture Mechanics , 59 (6). pp. 713-723. ISSN 0013-7944 . http://resolver.caltech.edu/CaltechAUTHORS:20150226-152529477

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Abstract

A simple rate-independent phenomenological constitutive model is used to model fracture behavior in elastic particulate composites undergoing damage. The constitutive model consists of two damage functions that govern the degradation of the bulk and the shear moduli. The elastic modulus is assumed to reach a saturation level under uniaxial conditions. Using the path independence of the J-integral and the concept of cracktip shielding, the remote or the applied stress intensity K∞ is related to the cracktip stress intensity factor K_t. The results from the model are used to predict the cracktip conditions in particulate composites undergoing damage. The model compares well with experimental results in predicting the crack opening profile as well as the displacement field in the vicinity of a cracktip.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/S0013-7944(97)00182-3 DOIArticle
http://www.sciencedirect.com/science/article/pii/S0013794497001823PublisherArticle
Additional Information:© 1998 Elsevier Science Ltd. Received 12 August 1997, in final form 24 November 1997, accepted 1 December 1997. We gratefully acknowledge the support of the Air Force Office of Scientific Research for this investigation. We thank Dr Walter Jones for his interest and encouragement during the course of this investigation. We also thank Professor C. W. Smith for providing us with the experimental data.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Subject Keywords:particulate composites, damage, crack-tip shielding, J integral, center-cracked strip specimen
Record Number:CaltechAUTHORS:20150226-152529477
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20150226-152529477
Official Citation:G. Ravichandran, C.T. Liu, Crack tip shielding in elastic particulate composites undergoing damage, Engineering Fracture Mechanics, Volume 59, Issue 6, 6 April 1998, Pages 713-723, ISSN 0013-7944, http://dx.doi.org/10.1016/S0013-7944(97)00182-3. (http://www.sciencedirect.com/science/article/pii/S0013794497001823)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55278
Collection:CaltechAUTHORS
Deposited By: Cheryl Gause
Deposited On:03 Mar 2015 00:28
Last Modified:29 Sep 2016 23:17

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