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On numerical integration and computer implementation of viscoplastic modelsDue to the stringent design requirement for aerospace or nuclear structural components, considerable research interests have been generated on the development of constitutive models for representing the inelastic behavior of metals at elevated temperatures. In particular, a class of unified theories (or viscoplastic constitutive models) have been proposed to simulate material responses such as cyclic plasticity, rate sensitivity, creep deformations, strain hardening or softening, etc. This approach differs from the conventional creep and plasticity theory in that both the creep and plastic deformations are treated as unified time-dependent quantities. Although most of viscoplastic models give better material behavior representation, the associated constitutive differential equations have stiff regimes which present numerical difficulties in time-dependent analysis. In this connection, appropriate solution algorithm must be developed for viscoplastic analysis via finite element method.
Document ID
19850023229
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chang, T. Y. (Akron Univ. Ohio, United States)
Chang, J. P. (Akron Univ. Ohio, United States)
Thompson, R. L. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 12, 2013
Publication Date
June 1, 1985
Publication Information
Publication: Nonlinear Constitutive Relations for High Temp. Appl., 1984
Subject Category
Structural Mechanics
Accession Number
85N31542
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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