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Kolsky Bar With Electrical Pulse Heating of the Sample

Published

Author(s)

Eric P. Whitenton, Michael Kennedy, Matthew A. Davies, Gerald V. Blessing, Brian S. Dutterer, Richard L. Rhorer, Howard W. Yoon, Lyle E. Levine, Richard J. Fields, D Basak, Timothy J. Burns

Abstract

The accuracy of simulations for modeling of machining processes is often limited due to insufficient knowledge of the material properties during machining, which can involve strain rates on the order of 104 per second or higher, plus rapid material heating. By adapting a traditional Kolsky bar (split-Hopkinson pressure bar) to an existing electrical-heating materials test facility, we have developed at the National Institute of Standards and Technology (NIST) the capability to provide high strain-rate, stress-strain data for rapidly preheated metal samples. By electrically heating the sample in ~500 ms immediately before the mechanical impact, we limit possible microstructural changes in the sample, and a stress-strain relationship can be determined at different temperatures for various test materials. The paper will discuss the design and construction of this new Kolsky bar facility and present preliminary data obtained from pulse heated dynamic tests.
Proceedings Title
Proceedings of Society for Experimental Mechanics, Society of Experimental Mechanics Annual Meeting
Conference Dates
June 2-4, 2003
Conference Location
Charlotte, NC
Conference Title
Society of Experimental Mechanics Annual Meeting

Keywords

dynamic material properties, Kolsky Bar, machining simulation

Citation

Whitenton, E. , Kennedy, M. , Davies, M. , Blessing, G. , Dutterer, B. , Rhorer, R. , Yoon, H. , Levine, L. , Fields, R. , Basak, D. and Burns, T. (2003), Kolsky Bar With Electrical Pulse Heating of the Sample, Proceedings of Society for Experimental Mechanics, Society of Experimental Mechanics Annual Meeting, Charlotte, NC (Accessed April 23, 2024)
Created June 1, 2003, Updated February 19, 2017