Internal State Variable Models for Rate and Temperature History Dependent Behavior at Finite Strain

Abstract

Under nonisothermal histories typical of metals under impact or deformation processing, dependence on the history of temperature and strain rate is potentially first order in terms of material response (McDowell & Voorhees, DSSG Report, IDA, 1995). The principal goal of this program has been to progress towards the next generation of ISV constitutive relations for thermoviscoplastic finite strain behavior of metals. The goals of this research program, which expired at the end of September 1998, were to explore: (1) more physically-based representation of the anisotropy of hardening and flow associated with development of dislocation substructure, including kinematical (deformation) as well as kinetics (flow) aspects; and (2) rate dependence of material strain hardening behavior for strain rates ranging from quasi-static to dynamic, with emphasis on temperature and strain rate history dependence, rather than just instantaneous temperature and strain rate dependence.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1998
Accession Number
ADA358500

Entities

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  • David L. Mcdowell

Organizations

  • Georgia Tech

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  • Human Systems

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  • Computer Programs
  • Constitutive Equations
  • Engineering
  • Linear Accelerators
  • Materials
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Physics
  • Plastic Properties
  • Polycrystals
  • Simulations
  • Strain Hardening
  • Strain Rate
  • Technology Transfer
  • Three Dimensional
  • United States

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