A comparison of the simplified elastic-plastic strain concentration factors, K{sub e}, of the ASME Boiler and Pressure Vessel Code with experimental and analytical results

Book · Fri Dec 01 04:00:00 EST 1995

OSTI ID:136806

Merend, A; Parsons, L S ^[1]

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1. Martin Marietta, Schenectady, NY (United States). Knolls Atomic Power Lab.

Low alloy steel laboratory test specimens of two different configurations were cyclically loaded to linearized stress ranges exceeding twice the material yield strength, 2Sy. Strain distributions in the specimens were monitored with strain gages and were correlated with die results of elastic and elastic plastic finite element analyses. A comparison of the elastic plastic strain concentration factors determined in this study with the K{sub e} factors specified by the NB-3228.5 simplified elastic-plastic analysis procedure showed the following: (1) At linearized stress ranges exceeding 2S{sub y}, the elastic-plastic strain concentration for both tested configurations fall below the Code K{sub e} factors. (2) Effects of elastic-plastic strain concentration are noted at stress ranges below twice the material yield strength, i.e., at stress ranges where the Code does not specify use of an elastic-plastic strain concentration factor. The significance of the above findings is reviewed relative to potential changes to the Code simplified elastic-plastic analysis procedure.

• OSTI ID: 136806
• Report Number(s): CONF-950740--; ISBN 0-7918-1344-4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
FATIGUE
FINITE ELEMENT METHOD
MATERIALS
PRESSURE VESSELS
STANDARDS
STEEL-ASTM-A508
STRAINS
STRESS ANALYSIS
STRESS INTENSITY FACTORS
THEORETICAL DATA