Title page for ETD etd-5958212489622671


Type of Document Master's Thesis
Author Rattazzi, Dean J.
URN etd-5958212489622671
Title Analysis of Adiabatic Shear Banding in a Thick-Walled Steel Tube by the Finite Element Method
Degree Master of Science
Department Engineering Science and Mechanics
Advisory Committee
Advisor Name Title
Kapania, Rakesh K.
Kriz, Ronald D.
Batra, Romesh C. Committee Chair
Keywords
  • thick-walled cylinder
  • high strain rate
  • adiabatic shear band
  • DYNA3D
Date of Defense 1996-09-02
Availability unrestricted
Abstract
The initiation and propagation of adiabatic shear bands is analyzed numerically for an impulsively loaded thick-walled steel tube. A circumferential V-notch located at the outer surface of the center of the tube provides a stress concentration. The material is modeled as strain hardening, strain-rate hardening and thermal softening. The dynamic loading conditions considered are pure torsion, axial pressure combined with torsion, and internal pressure combined with torsion. Because of the stress concentration, a shear band will first initiate in an element adjoining the notch tip and propagate radially inwards through the thickness of the tube. The speed of propagation and the amount of energy required to drive a shear band through the material are calculated. The effects of the pressure preload and the depth of the notch are studied. Also, the influence of thermal softening is investigated by modeling it after a relation proposed by Zhou et al.

[Vita removed July 18, 2008 CK/GMc 2/2/2012]

Files
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  Rattazzi.pdf 798.51 Kb 00:03:41 00:01:54 00:01:39 00:00:49 00:00:04

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.