PRONTO 2D: A two-dimensional transient solid dynamics program

Technical Report · Sun Mar 01 04:00:00 EST 1987

DOI:https://doi.org/10.2172/6671798· OSTI ID:6671798

Taylor, L M; Flanagan, D P

PRONTO 2D is a two-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. Four node uniform strain quadrilateral 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. A number of numerical examples are presented to demonstrate the utility of these algorithms. 41 refs., 51 figs., 5 tabs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6671798
• Report Number(s): SAND-86-0594; ON: DE87007823
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
42 ENGINEERING
420500 -- Engineering-- Materials Testing
99 GENERAL AND MISCELLANEOUS
990210 -- Supercomputers-- (1987-1989)
BOUNDARY CONDITIONS
COMPUTER CODES
DEFORMATION
DOCUMENT TYPES
FINITE ELEMENT METHOD
FORTRAN
MANUALS
MATHEMATICS
NUMERICAL SOLUTION
P CODES
PROGRAMMING LANGUAGES
STRAIN RATE
TOPOLOGY
TWO-DIMENSIONAL CALCULATIONS