ORNOZL: A finite-element mesh generator for nozzle-cylinder intersections containing inner-corner cracks

Technical Report · Tue Sep 01 04:00:00 EDT 1992

OSTI ID:6982884

Keeney-Walker, J; Bass, B R ^[1]

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1. Oak Ridge National Lab., TN (United States)

This report describes the ORNOZL finite-element mesh generator program for computational fracture mechanics analysis. The program automatically generates a three-dimensional (3-D) finite-element model for four different geometries of a comer crack in a nozzle-cylinder intersection. ORNOZL generates a core of special wedge or collapsed prism elements at the crack front to introduce the appropriate stress singularity at the crack tip. Regular 20-noded isoparametric brick elements are used away from the crack front in the modeling. Also, an option is included that allows for an embedded or penetrating crack in clad materials. As few as five input cards are required to execute the program. ORNOZL is part of a three-program system, ORNOZL-ADINA-ORVIRT, which addresses linear or nonlinear fracture in 2- or 3-D crack geometries. ORNOZL creates files containing nodal point coordinates and element connectivities that have formats compatible with the ADINA structural analysis program. ORVIRT is a postprocessor to ADINA and employs a virtual crack extension technique to compute energy release rates at specified positions along the crack front.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (United States). Div. of Engineering; Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: NRC; Nuclear Regulatory Commission, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6982884
• Report Number(s): NUREG/CR-5872; ORNL/TM--11049; ON: TI93011488
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
A CODES
CALCULATION METHODS
COMPUTER CODES
COMPUTER PROGRAM DOCUMENTATION
CRACK PROPAGATION
CRACKS
FINITE ELEMENT METHOD
FRACTURE MECHANICS
MECHANICS
MESH GENERATION
NOZZLES
NUMERICAL SOLUTION
O CODES
THREE-DIMENSIONAL CALCULATIONS
TWO-DIMENSIONAL CALCULATIONS