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The Conversion of Plastic Work to Heat around a Dynamically Propagating Crack in Metals

Rosakis, A. J. and Mason, J. J. and Ravichandran, G. (1993) The Conversion of Plastic Work to Heat around a Dynamically Propagating Crack in Metals. Journal of Mechanical Behavior of Materials, 4 (4). pp. 375-385. ISSN 0334-8938. http://resolver.caltech.edu/CaltechAUTHORS:20150225-160634772

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Abstract

Investigations of the temperature rise at a dynamically propagating crack tip using an infrared detector array are reported. Also, a measurement of the fraction of plastic work converted to heat using a split hopkinson bar apparatus in conjunction with an infrared detector array is summarized. For 4340 steel it is seen that ≈85% of the plastic work is converted to heat leading to a temperature rise of 300°C at a crack tip propagating 600 m/s in steel. This results is compared to earlier studies that report a 450°C temperature rise at a crack tip propagating 900 m/s in steel. In a titanium alloy the temperature rise is higher than that in steel for equal plastic work rate densities. The conditions at the crack tip are shown to be adiabatic, and, as a result, this effect is due to the difference in density, heat capacity and crack tip speed. Thermal conductivity has no effect.


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http://dx.doi.org/10.1515/JMBM.1993.4.4.375DOIArticle
http://www.degruyter.com/view/j/jmbm.1993.4.4/jmbm.1993.4.4.375/jmbm.1993.4.4.375.xmlPublisherArticle
http://resolver.caltech.edu/CaltechAUTHORS:20150309-093637326Related ItemTechnical Report
Additional Information:© 1993 by Freund Publishing House. We are grateful to Office of Naval Research for support under grant N00014-90-J-1340 and to A.T. Zehnder for sharing the raw data from his investigation. The computations described here were carried out on a Cray Y-MP at the San Diego Supercomputing Center (SDSC).
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Office of Naval Research (ONR)N00014-90-J-1340
Record Number:CaltechAUTHORS:20150225-160634772
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20150225-160634772
Official Citation:Journal of the Mechanical Behavior of Materials. Volume 4, Issue 4, Pages 375–386, ISSN (Online) 2191-0243, ISSN (Print) 0334-8938, DOI: 10.1515/JMBM.1993.4.4.375
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55221
Collection:CaltechAUTHORS
Deposited By: Cheryl Gause
Deposited On:06 Mar 2015 01:56
Last Modified:29 Sep 2016 23:39

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