Stochastic fatigue of welded steel joints

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:194305

Sarkani, S ^[1]; Kihl, D P; Beach, J E ^[2]

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

Fatigue tests were conducted on high strength welded steel cruciform shaped specimens subjected to random amplitude loadings. Results of these tests are used to experimentally investigate the effects of loading intensity, non-normality and frequency bandwidth on the rate of fatigue damage accumulation. Test results are compared with predictions made using Rayleigh approximation and rainflow analysis in terms of cycles and times to failure. Results indicate non-normality can significantly increase the rate of fatigue damage accumulation and result in non-conservative fatigue life estimates if its effect is not accounted for. Likewise, frequency content was also found to influence the rate of fatigue damage accumulation, but to a lesser extent than non-normality. When higher frequency components were included, shorter fatigue lives were observed. Fatigue life predictions using rainflow analysis produced generally good agreement with experimental results.

• OSTI ID: 194305
• Report Number(s): CONF-950695--; ISBN 0-7918-1308-8
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DYNAMIC LOADS
FAILURE MODE ANALYSIS
FATIGUE
OFFSHORE PLATFORMS
RESPONSE FUNCTIONS
STRESS ANALYSIS
WATER WAVES
WAVE FORCES
WELDED JOINTS