Rosakis, A. J. and Mason, J. J. and Ravichandran, G. (1992) The Conversion of Plastic Work to Heat around a Dynamically Propagating Crack in Metals. California Institute of Technology , Pasadena, CA. https://resolver.caltech.edu/CaltechAUTHORS:20150309-093637326
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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.
Item Type: | Report or Paper (Technical Report) | ||||||
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Additional Information: | 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). | ||||||
Group: | Graduate Aeronautical Laboratories (Solid Mechanics), GALCIT | ||||||
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DOI: | 10.7907/f9vk-b551 | ||||||
Record Number: | CaltechAUTHORS:20150309-093637326 | ||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20150309-093637326 | ||||||
Usage Policy: | You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format. | ||||||
ID Code: | 55628 | ||||||
Collection: | CaltechGALCITSM | ||||||
Deposited By: | Tony Diaz | ||||||
Deposited On: | 09 Mar 2015 22:13 | ||||||
Last Modified: | 23 Nov 2021 00:29 |
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