Selection and optimization of nonlinear material models for Lagrangian continuum computation
A library of material models suitable for large Lagrangian continuum computation is presented in the context of the explicit DYNA and implicit NIKE finite element codes at the Lawrence Livermore National Laboratory. Both strain measures and material formulation are seen as a homogeneous stress point problem separate from field discretization and a flexible material subroutine interface admits both incremental and total strain formulation, dependent on internal energy or an arbitrary set of other internal variables. Our basic material library is reviewed including our latest selection for finite strain rate independent plasticity, hydrodynamic equations of state, and a new multisurface plasticity model. The emphasis is on integrating a selection of the models of others for variety and economy of material representation, as well as optimal programming for efficient computing.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6290755
- Report Number(s):
- UCRL-88862; CONF-830615-2; ON: DE83009240
- Resource Relation:
- Conference: ASME summer meeting, Houston, TX, USA, 20 Jun 1983; Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
Similar Records
Synthesis of hydrocode and finite element technology for large deformation Lagrangian computation
Non-isothermal FEM analyses of large-strain back extrusion forging
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
MATERIALS
DEFORMATION
MATHEMATICAL MODELS
COMPUTER CALCULATIONS
FINITE ELEMENT METHOD
LAGRANGIAN FUNCTION
PLASTICITY
STRAINS
FUNCTIONS
MECHANICAL PROPERTIES
NUMERICAL SOLUTION
656000* - Condensed Matter Physics
990200 - Mathematics & Computers