Adiabaticity of high strain rate compression testing using the Split Hopkinson Pressure Bar Apparatus

Thumbnail Image
Date
1997
Authors
Walton, Frank Stewart
University of Lethbridge. Faculty of Arts and Science
Journal Title
Journal ISSN
Volume Title
Publisher
Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 1997
Abstract
In the development of explosively formed projectiles (EFPs), researchers are faced with the problem of testing prospective metals at high strain rates. So far it has been assumed that, relative to the cooling time, the deformation time is practically instantaneous indicating that the test is adiabatc: none of the heat generated within the metal is lost to conduction. In this paper we construct a model that subtracts out the effects of kinetic energy and uses specific heat as a function of temperature. In this way we can focus on the energy change in the specimen that can be attributed to temperature and determine just how adiabatic the high strain rate test is.
Description
vi, 74 leaves : ill. ; 28 cm.
Keywords
Dissertations, Academic , Materials at high pressures , Materials -- Testing , Metals -- Testing , Strength of materials
Citation