Mean stress effects in steel weldments subjected to constant amplitude fatigue loadings

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:455486

Kihl, D P ^[1]; Sarkani, S ^[2]

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1. David Taylor Model Basin CDNSWC, Bethesda, MD (United States). Structural Integrity Group
2. George Washington Univ., Washington, DC (United States). Dept. of Civil, Mechanical, and Environmental Engineering

Mean stress effects in steel weldments were examined under constant amplitude fatigue loadings. The purpose of these tests was to provide experimental data with which to substantiate the use of analytical expressions to account for mean stress effects. Fatigue tests were performed under both tensile and compressive mean stress levels. Test results indicate agreement with the Modified Goodman equation to be favorable in accounting for the effect of tensile mean stresses on fatigue life. However, test results from high fatigue loadings (maximum stresses greater than approximately half ultimate) were found to possess better agreement with the Gerber formulation than with the Modified Goodman. Behavior under compressive mean stresses indicated a linear correction relationship was required, which was less conservative than any of the relationships considered.

• OSTI ID: 455486
• Report Number(s): CONF-9606279--; ISBN 0-7918-1491-2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DYNAMIC LOADS
FATIGUE
LOW ALLOY STEELS
MECHANICAL TESTS
STRESS ANALYSIS
TENSILE PROPERTIES
WELDED JOINTS