LS-INGRID USER’S MANUAL Version 3.3 Copyright © 1990, 1991, 1992, 1993 By Livermore Software Technology Corporation Copyright © 1994, 1995, 1996 By Livermore Software Technology Corporation All rights reserved. Mailing Address: Livermore Software Technology Corporation 2876 Waverley Way Livermore, CA 94550 FAX: 510-449-2507 TEL: 510-449-2500 Table of Contents TABLE OF CONTENTS Table of Contents.................................................................................................................. 3 ABSTRACT ........................................................................................................................4 PREFACE........................................................................................................................... 4 1. LS-INGRID Basics ...........................................................................................................6 2. Control Commands............................................................................................................ 13 3. Ideas Part ........................................................................................................................45 4. PATRAN Part .................................................................................................................47 5. NASTRAN Part..... ..........................................................................................................49 6. Standard Part.................................................................................................................... 53 7. Beam Part ........................................................................................................................77 8. Old Data Part ....................................................................................................................81 9. MAZE Part ......................................................................................................................89 10. EDIT Part...................................................................................................................... 95 11. DYNA3D Part................................................................................................................ 97 12. Loads and Boundary Conditions ..........................................................................................99 13. Interactive Commands....................................................................................................... 111 14. Two-Dimensional Line Definitions .....................................................................................127 15. Three-Dimensional Line Definitions ....................................................................................131 16. Surface Definitions........................................................................................................... 135 17. Volume Definitions.......................................................................................................... 139 18. Coordinate Transformations ...............................................................................................141 19. LS-DYNA2D Commands and Materials ...............................................................................145 20. LS-DYNA3D Commands and Materials ...............................................................................175 21. Equations-of-State........ ....................................................................................................253 22. LS-NIKE2D Commands and Materials .................................................................................265 23. LS-NIKE3D Commands and Materials .................................................................................285 24. TOPAZ Commands and Materials....................................................................................... 306 ACKNOWLEDGEMENTS..... ................................................................................................314 REFERENCES ....................................................................................................................315 Index................................................................................................................................... 316 3 LS-INGRID LS-INGRID: A Pre-Processor and Three Dimensional Mesh Generator for the Programs LS-DYNA3D, LS-NIKE3D and TOPAZ3D. ABSTRACT LS-INGRID is a general purpose pre-processor for the programs, LS-NIKE2D[1], LS- NIKE3D[2], LS-DYNA2D[3], LS-DYNA3D[4], TOPAZ2D[5] and TOPAZ3D[6]. It can be used as a simple translator to convert various databases to these programs. In addition, it is a general purpose three-dimensional mesh generator with considerable capability to deal with complex geometries and allows for parametric geometric modeling. PREFACE LS-INGRID is an alternative mesh generator for finite element modeling which is principally intended as "research" program or one that focuses on various capabilities and techniques which are not addressed by commercial mesh generators. As a general purpose mesh generator, the capabilities are fairly complete with a wide range of geometric capabilities. An extensive parametric modeling capability is also support. LS-INGRID is most effective in combination with NIKExx and DYNAxx. A considerable amount of effort has gone into making LS-INGRID support virtually every feature of these programs (an almost impossible task given the rate that LS-DYNA3D improves). Although the usage of LS-INGRID can seem somewhat combersome relative to more traditional mesh generation schemes, the productivity of users performing parametric modeling tasks with LS-INGRID can much higher in some cases. Unlike most general purpose mesh generators, LS-INGRID was developed by the Author for the sole purpose of aiding them in their routine analysis tasks. The original code was developed to assist in the preparation of SAP5 models at the University of Tennessee beginning in 1978. The 1978 program was loosely based on index space ideas obtained from the INGEN[7] program which was developed at Los Alamost National Laboratory. In 1981, the author moved to Lawrence Livermore National Laboratory. INGRID developments continued at LLNL on the side because LLNL was committed to the development of MAZE3D, but did not have any supported three- dimensional mesh generator. In 1985, the MAZE3D effort was finally abandoned and INGRID became the principal mesh generator of LLNL by default. At this time, the program was merged with the MAZE[8] program to produce a version similar to the current LS-INGRID. 4 Introduction After 1985, development work continued at SPARTA with a steady evolution and the addition of the parametric modeling capabilities. LS-INGRID is the latest version supported by LSTC. Development on LS-INGRID is continuing in the directions which proved most popular in the past. The emphasis will continue to be providing a general purpose capability focused on NIKExx and DYNAxx with much work being done to support advanced modeling capabilities which are not found in any other program. 5 LS-INGRID 1 . LS-INGRID BASICS The LS-INGRID input file is an ASCII datafile which contains a complete description of the analysis. The commands are input using a parser which is simple and efficient, but also has a considerable amount of flexibility for dealing with complex situation. 1.1 THE PARSER The parser basically takes a stream of blank delimited character strings and number and decodes them for the program. The character strings are for commands or parameters and are arbitrary in length. Normally, only the first four characters are significant. Deviations from this rule are described in the documentation. Numbers can be input in a variety of formats ranging from simple integers to floating point numbers specified with an "E" format. If an error is detected in the decoding of a number, the user will be notified. All character input for commands or numbers is automatically converted to lower case for processing. Thus case selection can be performed strictly for the purpose of enhancing readability. Any number of commands and numbers can be placed on a single line of input with the only constraint being the 80 character input line limit. In the commands description, upper case characters or characters enclosed within quotes are commands which are to be typed exactly as lower (ignoring case). Lower case items represent variables which require input. Comments may be included by using a "c" anywhere in the input followed by a blank and the comment. If the comment does not begin in column 1, then the "c" must be preceded by a blank. Blocks of input lines can be commented by preceding the block with the character "{" and ending it with "}". Although items are normally blank delimited, commas can also be used to separate items. Two commas which are separated by blanks are treated as having the number 0 between them. Lists of numbers or character strings are input and terminated normally by a ";". This ";" does not necessarily need a blank between it and the last item. If the list is a list of numbers, then the list can be terminated by simply beginning the next command and eliminating the semicolon. A function calculator is also built into the parser to permit advanced programming techniques to be used. This calculator is invoked by placing the calculator command within two square brackets. If the parser is expecting a character string, then the function will be processed without any other effect on the command stream.