A comparison of CTH predictions with experimental armor/anti-armor data for long rod penetrators in two and three dimensions

Conference · Tue May 01 00:00:00 EDT 1990

OSTI ID:6924144

Hertel, E S; McGlaun, J M; Yarrington, P

CTH is a software system under development at Sandia National Laboratories (SNL) to model multidimensional, multi-material, large deformation, strong shock wave physics. One-dimensional rectilinear, cylindrical, and spherical meshes; two-dimensional rectangular, and cylindrical meshes; and three-dimensional rectangular meshes are currently available. A two-step Eulerian solution scheme is used with these meshes. The first step is a Lagrangian step in which the cells distort to follow the material motion. The second step is a remesh step where the distorted cells are mapped back to the original Eulerian mesh. CTH has several thermodynamic models that are used for simulating strong shock, large deformation events. Both tabular and analytic equations of state are available. CTH can model material strength, high explosive detonation, fracture, and motion of fragments smaller than a computational cell. The material strength model is elastic perfectly plastic with thermal softening. A programmed burn model is available for computing the thermodynamic properties of explosive detonation. The Jones-Wilkins-Lee equation of state is available for modelling high explosive reaction products. Fracture can be initiated based on pressure or principle stress. A special model is available for moving fragments smaller than a computational cell with the correct statistical velocity. 7 refs.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6924144
• Report Number(s): SAND-90-0506C; CONF-9005122-3; ON: DE90009744
• Resource Relation: Conference: 1990 conference on the application of 3-D hydrocodes to armor/anti-armor problems, Aberdeen Proving Ground, MD (USA), 7-11 May 1990
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
36 MATERIALS SCIENCE
ARMOR
IMPACT STRENGTH
IMPACT SHOCK
COMPUTERIZED SIMULATION
SHOCK WAVES
C CODES
MECHANICAL PROPERTIES
PROJECTILES
STEELS
THREE-DIMENSIONAL CALCULATIONS
TUNGSTEN ALLOYS
ALLOYS
COMPUTER CODES
IRON ALLOYS
IRON BASE ALLOYS
SIMULATION
420500* - Engineering- Materials Testing
990200 - Mathematics & Computers
360103 - Metals & Alloys- Mechanical Properties