Implementation and Verification of a Viscoplastic Material Model Using the ANSYS Code

Conference · Fri Apr 19 04:00:00 EDT 1991

OSTI ID:5871762

Wang, Zhibi ^[1]; Turula, Peter ^[1]; Popper, Glenn F. ^[1]

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1. Argonne National Laboratory (ANL), Argonne, IL (United States). Materials and Components Technology Division

Stress/strain test data indicate that most materials exhibit higher stiffness under dynamic conditions than under equivalent static conditions. Therefore, for structures subjected to rapid loadings, strain-rate effects should be considered when dynamic nonlinear analysis is performed. To account for the strain-rate effect on deformation, Perzyna's constitutive model was selected because it is a classic viscoplastic mathematical model that has been found to be consistent with experimental results. The advantage of this model over other models that give comparable results, is that it can be programmed into a finite-element computer code "with less effort. The model was implemented with the multipurpose finite-element code ANSYS 4.4 as a user-programmable function by invoking the ANSYS USERPL subroutine. The programming of the viscoplastic constitutive formulation in USERPL, and the results obtained with ANSYS are described.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5871762
• Report Number(s): ANL/CP--72527; CONF-9105159--1; ON: DE91010571
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420500* -- Engineering-- Materials Testing
97 MATHEMATICS AND COMPUTING
990200 -- Mathematics & Computers
A CODES
COMPUTER CODES
DATA
ELASTICITY
IMPLEMENTATION
INFORMATION
MATERIALS TESTING
MATHEMATICAL MODELS
MATHEMATICS
MECHANICAL PROPERTIES
NUMERICAL ANALYSIS
NUMERICAL DATA
PLASTICITY
STRAIN RATE
STRESSES
TENSILE PROPERTIES
TESTING
THEORETICAL DATA
VISCOSITY