NESC9649 INGRID.
INGRID, 3-D Mesh Generator for Program DYNA3D and NIKE3D and FACET and TOPAZ3D
NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES
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3. DESCRIPTION OF PROGRAM OR FUNCTION
INGRID is a general-purpose, three-dimensional mesh generator developed for use with finite element, nonlinear, structural dynamics codes. INGRID generates the large and complex input data files for DYNA3D (NESC 9909), NIKE3D (NESC 9725), FACET, and TOPAZ3D.
One of the greatest advantages of INGRID is that virtually any shape can be described without resorting to wedge elements, tetrahedrons, triangular elements or highly distorted quadrilateral or hexahedral elements. Other capabilities available are in the areas of geometry and graphics. Exact surface equations and surface intersections considerably improve the ability to deal with accurate models, and a hidden line graphics algorithm is included which is efficient on the most complicated meshes. The most important new capability is associated with the boundary conditions, loads, and material properties required by nonlinear mechanics programs. Commands have been designed for each case to minimize user effort. This is particularly important since special processing is almost always required for each load or boundary condition.
This package is distributed by:
Energy Science and Technology Software Center
P.O. Box 62
1 Science.Gov Way
Oak Ridge, TN 37831
(865) 576-2606 TEL
(865) 576-6436 FAX
E-mail: ESTSC@osti.gov
INGRID is a general-purpose, three-dimensional mesh generator developed for use with finite element, nonlinear, structural dynamics codes. INGRID generates the large and complex input data files for DYNA3D (NESC 9909), NIKE3D (NESC 9725), FACET, and TOPAZ3D.
One of the greatest advantages of INGRID is that virtually any shape can be described without resorting to wedge elements, tetrahedrons, triangular elements or highly distorted quadrilateral or hexahedral elements. Other capabilities available are in the areas of geometry and graphics. Exact surface equations and surface intersections considerably improve the ability to deal with accurate models, and a hidden line graphics algorithm is included which is efficient on the most complicated meshes. The most important new capability is associated with the boundary conditions, loads, and material properties required by nonlinear mechanics programs. Commands have been designed for each case to minimize user effort. This is particularly important since special processing is almost always required for each load or boundary condition.
This package is distributed by:
Energy Science and Technology Software Center
P.O. Box 62
1 Science.Gov Way
Oak Ridge, TN 37831
(865) 576-2606 TEL
(865) 576-6436 FAX
E-mail: ESTSC@osti.gov
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4. METHOD OF SOLUTION
Geometries are described primarily using the index space notation of the INGEN program (NESC 975) with an additional type of notation, index progression. Index progressions provide a concise and simple method for describing complex structures; the concept was developed to facilitate defining multiple regions in index space. Rather than specifying the minimum and maximum indices for a region, one specifies the progression of indices along the I, J and K directions, respectively. The index progression method allows the analyst to describe most geometries including nodes and elements with roughly the same amount of input as a solids modeler.
Geometries are described primarily using the index space notation of the INGEN program (NESC 975) with an additional type of notation, index progression. Index progressions provide a concise and simple method for describing complex structures; the concept was developed to facilitate defining multiple regions in index space. Rather than specifying the minimum and maximum indices for a region, one specifies the progression of indices along the I, J and K directions, respectively. The index progression method allows the analyst to describe most geometries including nodes and elements with roughly the same amount of input as a solids modeler.
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8. RELATED AND AUXILIARY PROGRAMS
Interactive graphics in INGRID are patterned after TAURUS (NESC 9908), a three-dimensional postprocessor, and MAZE (NESC 9907), a two-dimensional mesh generator. Much of the coding from MAZE is directly incorporated in INGRID. The LLNL-developed DIGLIB/VMS (NESC 9639) graphics software used by the DEC VAX11 version of INGRID is included with that version.
Interactive graphics in INGRID are patterned after TAURUS (NESC 9908), a three-dimensional postprocessor, and MAZE (NESC 9907), a two-dimensional mesh generator. Much of the coding from MAZE is directly incorporated in INGRID. The LLNL-developed DIGLIB/VMS (NESC 9639) graphics software used by the DEC VAX11 version of INGRID is included with that version.
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10. REFERENCES
- INGRID, NESC No. 9649.3090, INGRID IBM 3090 Version Tape
Description,
National Energy Software Center Note 88-75, June 3, 1988.
- INGRID, NESC No. 9649, INGRID Tape Description,
National Energy Software Center Note 86-44, May 23, 1986.
- W.A. Cook
INGEN: A General-Purpose Mesh Generator for Finite-Element Codes,
LA-9402-MS, June 1982.
- B.E. Brown and J.O. Hallquist
TAURUS: An Interactive Post-Processor for the Analysis Codes
NIKE2D, DYNA3D, TACO3D, and GEMINI,
UCID-19392, July 1982.
- John O. Hallquist
MAZE - An Input Generator for DYNA2D and NIKE2D,
UCID-19029, Rev. 2, June 1983.
- J.O. Hallquist
NIKE3D: An Implicit Finite-Deformation, Finite Element Code for
Analyzing the Static and Dynamic Response of Three-Dimensional
Solids,
UCID-18822, Rev. 1, July 1984.
- John O. Hallquist
DYNA3D User's Manual,
UCID-19592, November 1982, and Revisions June 17, 1983.
- INGRID, NESC No. 9649.3090, INGRID IBM 3090 Version Tape
Description,
National Energy Software Center Note 88-75, June 3, 1988.
- INGRID, NESC No. 9649, INGRID Tape Description,
National Energy Software Center Note 86-44, May 23, 1986.
- W.A. Cook
INGEN: A General-Purpose Mesh Generator for Finite-Element Codes,
LA-9402-MS, June 1982.
- B.E. Brown and J.O. Hallquist
TAURUS: An Interactive Post-Processor for the Analysis Codes
NIKE2D, DYNA3D, TACO3D, and GEMINI,
UCID-19392, July 1982.
- John O. Hallquist
MAZE - An Input Generator for DYNA2D and NIKE2D,
UCID-19029, Rev. 2, June 1983.
- J.O. Hallquist
NIKE3D: An Implicit Finite-Deformation, Finite Element Code for
Analyzing the Static and Dynamic Response of Three-Dimensional
Solids,
UCID-18822, Rev. 1, July 1984.
- John O. Hallquist
DYNA3D User's Manual,
UCID-19592, November 1982, and Revisions June 17, 1983.
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- I. Deformation and Stress Distributions, Structural Analysis and Engineering Design Studies
Keywords: computer graphics, finite element method, interactive computing, mechanical structures, mesh generation, nonlinear problems, three-dimensional.