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Comparison of three real time techniques for the measurement of dynamic fracture initiation toughness in metals

Anderson, D. D. and Rosakis, A. J. (2005) Comparison of three real time techniques for the measurement of dynamic fracture initiation toughness in metals. Engineering Fracture Mechanics , 72 (4). pp. 535-555. ISSN 0013-7944 . http://resolver.caltech.edu/CaltechAUTHORS:20150306-142747141

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Abstract

Three techniques for measuring dynamic stress intensity factor time histories of dynamically loaded stationary mode-I cracks are compared as applied to dynamically loaded pre-cracked 6Al–4V titanium alloy specimens. The three techniques are crack opening displacement (COD), dynamic strain gage measurement, and coherent gradient sensing (CGS). The stress intensity factor histories are inferred from each measurement technique and are used to obtain the critical dynamic initiation toughness as a function of loading rate (K^(d)_(Ic)(K^⋅^(d)_(I))). There are significant differences in implementation and information obtained from each of the three measurement techniques, though for the tests performed all are found to yield very similar results.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.engfracmech.2004.04.005DOIArticle
http://www.sciencedirect.com/science/article/pii/S0013794404001055PublisherArticle
Additional Information:© 2004 Elsevier Ltd. Received 7 October 2003, Revised 15 April 2004, Accepted 18 April 2004, Available online 23 June 2004. The authors would like to acknowledge the gracious support of the Office of Naval Research (Steels) program and Dr. Julie Christodoulou, program officer, under contract number N00014-01-1-0937. We would also like to extend our gratitude to Prof. G. Ravichandran (Caltech) for his insights shared over numerous conversations.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-01-1-0937
Subject Keywords:Dynamic fracture mechanics; Dynamic initiation toughness; Crack opening displacement; Coherent gradient sensing
Record Number:CaltechAUTHORS:20150306-142747141
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20150306-142747141
Official Citation:Anderson, D. D., & Rosakis, A. J. (2005). Comparison of three real time techniques for the measurement of dynamic fracture initiation toughness in metals. Engineering Fracture Mechanics, 72(4), 535-555. doi: http://dx.doi.org/10.1016/j.engfracmech.2004.04.005
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55612
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:07 Mar 2015 00:26
Last Modified:20 Sep 2016 23:13

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