Accession Number:

AD0725030

Title:

A Theory of Viscoplasticity without a Yield Surface. Part 1. General Theory

Descriptive Note:

Interim Scientifc, vol. 1

Corporate Author:

IOWA UNIV IOWA CITY DEPT OF MECHANICS AND HYDRAULICS

Personal Author(s):

Report Date:

1970-12-01

Pagination or Media Count:

30.0

Abstract:

A mathematical theory is proposed of thermo-viscoplasticity which is a synthesis of experimentally observed material behavior on one hand, and the concepts of irreversible thermodynamics on the other. The underlying principle is that the history of deformation is defined in terms of a time scale which is not measured by a clock, but is in itself a property of the material at hand. The theory is unifying in the sense that theories of plasticity, viscoelasticity and elasticity can be obtained from it as special cases by imposing suitable constraints on the material parameters involved furthermore, it does not make use of the idea of a yield surface.

Subject Categories:

  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE