Implementation of a Nonisothermal Unified Inelastic-Strain Theory for a Titanium Alloy into ABAQUS 5.4 User Guide
Abstract
Simulations with many modern aerospace materials require realistic mechanical response models for use in isothermal and non-isothermal applications. One such model is a unified inelastic-strain theory which has been applied to capture the strain-rate sensitivity and time dependent behavior of the titanium alloy Timetal21S. The Bodner-Partom form of unified theory satisfactorily describes the Timetal 21S stress-strain response for a range of temperatures from 23 deg C to 815 deg C and strain rates from 10-3/s to 1 .X10-7/s. Practical use of the theory in finite element applications depends on advanced numerical algorithms that rapidly solve the inherently "stiff' constitutive equations. Special "user-defined" subroutines provide the framework for the incorporation of these numerical algorithms into ABAQUS 5.4, a general purpose finite element package. This user-guide contains a brief over-view of the theory, the Timetal21S material parameters, subroutine structure, variable nomenclature, and numerical algorithms. Test cases are described to illustrate the numerical integration schemes and provide guidance for error management. The appendices contain source code of the subroutines and other related input files
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1996
- Accession Number
- ADA368761
Entities
People
- Joseph L. Kroupa
Organizations
- University of Dayton