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Experimental Determination of Dynamic Crack Initiation and Propagation Fracture Toughness in Thin Aluminum Sheets

Owen, D. M. and Zhuang, S. and Rosakis, A. J. and Ravichandran, G. (1998) Experimental Determination of Dynamic Crack Initiation and Propagation Fracture Toughness in Thin Aluminum Sheets. International Journal of Fracture, 90 (1-2). pp. 153-174. ISSN 0376-9429. http://resolver.caltech.edu/CaltechAUTHORS:20150226-154819567

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Abstract

An experimental investigation was undertaken to characterize the dynamic fracture characteristics of 2024-T3 aluminum thin sheets ranging in thickness from 1.63–2.54 mm. Specifically, the critical dynamic stress intensity factor K^d_c was determined over a wide range of loading rates (expressed as the time rate of change of the stress intensity factor K^d_I) using both a servo-hydraulic loading frame and a split Hopkinson bar in tension. In addition, the dynamic crack propagation toughness, K_D, was measured as a function of crack tip speed using high sensitivity strain gages. A dramatic increase in both K^d_c and K_D was observed with increasing loading rate and crack tip speed, respectively. These relations were found to be independent of specimen thickness over the range of 1.5 to 2.5 mm.


Item Type:Article
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URLURL TypeDescription
http://dx.doi.org/10.1023/A:1007439301360 DOIArticle
http://link.springer.com/article/10.1023%2FA%3A1007439301360PublisherArticle
Additional Information:© 1998 Kluwer Academic Publishers. Received 6 January 1997; accepted in revised form 8 January 1998. This work has been made possible through a grant from the Federal Aviation Administration (FAA) to Caltech (FAA Grant 95-G-048). The authors are very grateful to Mr. Joseph Gatto, the FAA Technical Monitor and Dr. Victor Chen and Mr. Jon Mowery of McDonnell Douglas for their consistent interest and technical discussions during the course of this research.
Group:GALCIT
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Funding AgencyGrant Number
Federal Aviation Administration (FAA)95-G-048
Subject Keywords:Fracture, dynamic crack initiation, thin aluminum
Record Number:CaltechAUTHORS:20150226-154819567
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20150226-154819567
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55286
Collection:CaltechAUTHORS
Deposited By: Cheryl Gause
Deposited On:03 Mar 2015 00:34
Last Modified:29 Sep 2016 23:36

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