PRONTO 3D: A three-dimensional transient solid dynamics program
PRONTO 3D is a three-dimensional transient solid dynamics code for analyzing large deformations of highly nonlinear materials subjected to extremely high strain rates. This Lagrangian finite element program uses an explicit time integration operator to integrate the equations of motion. Eight-node uniform strain hexahedral elements are used in the finite element formulation. A number of new numerical algorithms which have been developed for the code are described in this report. An adaptive time step control algorithm is described which greatly improves stability as well as performance in plasticity problems. A robust hourglass control scheme which eliminates hourglass distortions without disturbing the finite element solution is included. All constitutive models in PRONTO are cast in an unrotated configuration defined using the rotation determined from the polar decomposition of the deformation gradient. An accurate incremental algorithm was developed to determine this rotation and is described in detail. A robust contact algorithm was developed which allows for the impact and interaction of deforming contact surfaces of quite general geometry. Numerical examples are presented to demonstrate the utility of these algorithms. 34 refs., 27 figs., 12 tabs.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6212624
- Report Number(s):
- SAND-87-1912; ON: DE89010517
- Resource Relation:
- Other Information: Paper copy only, copy does not permit microfiche production
- Country of Publication:
- United States
- Language:
- English
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GENERAL PHYSICS
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
DEFORMATION
COMPUTER CALCULATIONS
SOLIDS
ALGORITHMS
BOUNDARY CONDITIONS
DYNAMIC LOADS
EQUATIONS OF MOTION
EQUATIONS OF STATE
FINITE ELEMENT METHOD
NONLINEAR PROBLEMS
P CODES
PLASTICITY
STRAINS
THREE-DIMENSIONAL CALCULATIONS
COMPUTER CODES
DIFFERENTIAL EQUATIONS
EQUATIONS
MATHEMATICAL LOGIC
MECHANICAL PROPERTIES
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
657000* - Theoretical & Mathematical Physics
990220 - Computers
Computerized Models
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