Fracture mechanics and residual fatigue life analysis for complex stress fields. Technical report

Technical Report · Tue Jul 01 00:00:00 EDT 1975

DOI:https://doi.org/10.2172/7138348· OSTI ID:7138348

Besuner, P M

This report reviews the development and application of an influence function method for calculating stress intensity factors and residual fatigue life for two- and three-dimensional structures with complex stress fields and geometries. Through elastic superposition, the method properly accounts for redistribution of stress as the crack grows through the structure. The analytical methods used and the computer programs necessary for computation and application of load independent influence functions are presented. A new exact solution is obtained for the buried elliptical crack, under an arbitrary Mode I stress field, for stress intensity factors at four positions around the crack front. The IF method is then applied to two fracture mechanics problems with complex stress fields and geometries. These problems are of current interest to the electric power generating industry and include (1) the fatigue analysis of a crack in a pipe weld under nominal and residual stresses and (2) fatigue analysis of a reactor pressure vessel nozzle corner crack under a complex bivariate stress field. (GRA)

• Research Organization: Failure Analysis Associates, Palo Alto, Calif. (USA)
• OSTI ID: 7138348
• Report Number(s): PB-246254
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
CONTAINERS
COOLING SYSTEMS
FAILURES
FATIGUE
FRACTURES
MECHANICAL PROPERTIES
PIPELINES
POWER REACTORS
PRESSURE VESSELS
PRIMARY COOLANT CIRCUITS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
STRESS ANALYSIS