Numerical Experiments on Adiabatic Shear Band Formation in One Dimension
Abstract
Adiabatic shear band formation in an elastic, thermo-visco-plastic, simple material is studied in the context of unidirectional shearing of a slab. The effect of varying the thermal softening behavior of the material on localization strain and post-localization morphology is studied for a rigid, perfectly plastic material; the material parameters are appropriate for a high- strength steel. In this case, it is demonstrated that localization of the strain rate can be transient A coupling between linear-elastic response and the basic thermo-visco-plastic localization mechanism is explored in the absence of strain hardening. Lastly, the flow law is modified to include strain hardening in order to simulate a high-rate torsion test on OFHC copper. In this case, localization is initiated by thermal boundary layer diffusion, and the solution takes on a complex, apparently nonperiodic, post-localization morphology quite different from that in the perfectly-plastic cases.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1992
- Accession Number
- ADA253270
Entities
People
- John W. Walter Jr.
Organizations
- Ballistic Research Laboratory