ESTS0329 ORMGEN3D. (Abstract last modified 09-MAR-1994)
1.
NAME OR DESIGNATION OF PROGRAM - ORMGEN3D, 3-d crack geometries mesh generator. 2.
COMPUTER FOR WHICH PROGRAM IS DESIGNED AND OTHER MACHINE VERSION PACKAGES AVAILABLE -
To request or retrieve programs click on the one of the active versions below.
A password and special authorization is required. Explanation of the status codes.
Machines used:
Package-ID Orig.Computer Test Computer
ESTS0329/01 CRAY family CRAY EL98
3.
DESCRIPTION OF PROGRAM OR FUNCTION - ORMGEN3D is a finite element mesh generator for computational fracture mechanics analysis. The program automatically generates a three-dimensional finite element model for six different crack geometries. These geometries include flat plates with straight or curved surface cracks and cylinders with part-through cracks on the outer or inner surface. Mathematical or user-defined crack shapes may be considered. The curved cracks may be semicircular, semielliptical, or user-defined. A cladding option is available that allows for either an embedded or penetrating crack in the clad material.
4.
METHOD OF SOLUTION - In general, one eighth or one-quarter of the structure is modelled depending on the configuration or option selected. The program generates a core of special wedge or collapsed prism elements at the crack front to introduce the appropriate stress singularity at the crack tip. The remainder of the structure is modelled with conventional 20-node isoparametric brick elements. Element group I of the finite element model consists of an inner core of special crack tip elements surrounding the crack front enclosed by a single layer of conventional brick elements. Eight element divisions are used in a plane orthogonal to the crack front, while the number of element divisions along the arc length of the crack front is user-specified. The remaining conventional brick elements of the model constitute element group II.
5.
RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM - Maxima of: 6.
TYPICAL RUNNING TIME - NESC executed all six sample problems in 2.2 CP seconds on a Cray Y-MP/832.
7.
UNUSUAL FEATURES OF THE PROGRAM - 8.
RELATED AND AUXILIARY PROGRAMS - ORMGEN3D is part of a three- program system, ORMGEN-ADINA-ORVIRT, which addresses linear or nonlinear fracture in two -or three dimensional crack geometries. ORMGEN3D creates data flow of nodal point coordinates, element connectivities, displacement, and pressure boundary conditions for input to the ADINA structural analysis program. ORVIRT functions as a postprocessor to ADINA and employs a virtual crack extension technique to compute energy release rates at specified positions along the crack front.
9.
STATUS 10.
REFERENCES - 11.
MACHINE REQUIREMENTS - ORMGEN3D requires 263,000 words of memory for execution on a Cray Y-MP/832.
12.
PROGRAMMING LANGUAGE(S) USED - 13.
OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED - UNICOS 5.1. 14.
OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS - 15.
NAME AND ESTABLISHMENT OF AUTHORS - 16.
MATERIAL AVAILABLE - 17.
CATEGORIES - Keywords: CYLINDERS, FINITE ELEMENT METHOD, MESH GENERATION, PLATES, THREE-DIMENSIONAL
Program-name Package-ID Status
ORMGEN-3D ESTS0329/01 Tested
5,500 nodes
4 layers of clad elements
ESTS0329/01: 09-MAR-1994 Tested at NEADB
- B.R. Bass and J.W. Bryson, Applications of Energy Release Rate
Techniques to Part-Through Cracks in Plates and Cylinders,
Volume 1. ORMGEN-3D: A Finite Element Mesh Generator for
3-Dimensional Crack Geometries, NUREG/CR-2997 Volume 1
(ORNL/TM-8527/VI), December 1982, with User Instruction Updates
(Version 3.0), September 23, 1988.
_ ORMGEN3D, NESC No. 11348, ORMGEN3D Tape Description and Sample
Problem Output, National Energy Software Center Note 92-16,
October 17, 1991.
- B.R. Bass and J.W. Bryson, Applications of energy Release Rate
Techniques to Part-Through Cracks in Plates and Cylinders,
Volume 2. ORVIRT: A Finite Element Program for Energy Release
Rate Calculations for 2-Dimensional and 3-Dimensional Crack
Models, NUREG/CR-2997 Volume 2 (ORNL/TM-8527/V2), February 1983. - K.J. Bathe, ADINA - A Finite Element Program for Automatic Dynamic Incremental Nonlinear Analysis, Massachusetts Institute of
Technology report 82448-1, 1975, revised 1978.
ESTS0329/01:
- B.R. Bass and J.W. Bryson:
Applications of Energy Release Rate Techniques to Part-Through
Cracks in Plates and Cylinders
Volume 1. ORMGEN-3D: A Finite Element Mesh Generator for
3-Dimensional Crack Geometries
NUREG/CR-2997 Volume 1 (ORNL/TM-8527/VI), (December 1982).
- L. Eyberger:
ORMGEN3D, NESC No. 11348, ORMGEN3D Tape Description and Sample
Problem Output
NESC Note 92-16 (October 17, 1991).
ESTS0329/01: FORTRAN
B.R. Bass and J.W. Bryson
Oak Ridge National Laboratory
ESTS0329/01:
ESTS0329_01.001 Information file 61 records
ESTS0329_01.002 JCL and control information 16 records
ESTS0329_01.003 ORMGEN3D FORTRAN source 2950 records
ESTS0329_01.004 Sample problem input 1 10 records
ESTS0329_01.005 Sample problem input 2 9 records
ESTS0329_01.006 Sample problem input 3 9 records
ESTS0329_01.007 Sample problem input 4 9 records
ESTS0329_01.008 Sample problem input 5 8 records
ESTS0329_01.009 Sample problem input 6 8 records
ESTS0329_01.010 Sample problem output 1 107 records
ESTS0329_01.011 Sample problem output 2 85 records
ESTS0329_01.012 Sample problem output 3 107 records
ESTS0329_01.013 Sample problem output 4 120 records
ESTS0329_01.014 Sample problem output 5 82 records
ESTS0329_01.015 Sample problem output 6 82 records
ESTS0329_01.016 Logfile sample problem 1 12 records
ESTS0329_01.017 Logfile sample problem 2 12 records
ESTS0329_01.018 Logfile sample problem 3 12 records
ESTS0329_01.019 Logfile sample problem 4 12 records
ESTS0329_01.020 Logfile sample problem 5 12 records
ESTS0329_01.021 Logfile sample problem 6 11 records
- L. Data Preparation
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