Showing papers on "Shear band published in 1970"
DOI•
01 Jan 1970
TL;DR: In this paper, it was shown that during the penetration of aluminum alloys by projectiles, bands of intense shear may be formed, which lowers the ability of the material to withstand further projectile penetration.
Abstract: Bands of intense shear may be formed during the penetration of aluminum alloys by projectiles. It is shown that the formation of these bands lowers the ability of the material to withstand further projectile penetration. The structure of these bands has been investigated by electron microscopy and the results obtained indicate that melting occurs within the bands. A simple model of a propagating shear band predicts that the material within the band will melt.
27 citations
TL;DR: In this article, a viscoplastic-damage type constitutive theory for high strain rate flow process and ductile fracture is applied to the problem of shear band localization and fracture of dynamically loaded inelastic bodies experiencing strain rates ranging between 10^ − 10^ s~*.
Abstract: The main objective of the present paper is the application of a recently developed viscoplastic-damage type constitutive theory for high strain rate flow process and ductile fracture to the problem of shear band localization and fracture of dynamically loaded inelastic bodies experiencing strain rates ranging between 10^ — 10^ s~*. In the first part of the paper an adiabatic inelastic flow process is formulated and investigated. The Cauchy problem is examined and the conditions for well-posedness are discussed. The relaxation time is used as a regularization parameter. The viscoplastic regularization procedure assures the unconditionally stable integration algorithm by using the finite element method. The second part of the paper is devoted to the numerical investigation of the three-dimensional dynamic adiabatic deformations of a steel thin tube twisted in a split Hopkinson bar at nominal strain rates ranging 10"* 10^ s~"\
4 citations