Fatigue Strength of Stainless Steel Weldments

다국어 초록 (Multilingual Abstract)

Fatigue crack propagation in stiffened box-sections and stiffened single panels was studied through experimental andanalytical means. Large scale testing was conducted by subjecting the specimens to cyclic fatigue loading. The cracks weresimilar to what was measured in the specimens. Using superposition, linear elastic fracture mechanics was employed throughfinite element analysis and simplistic analytical models to determine the range in stress intensity factor (K). Crack propagationrate as a function of K was estimated using the Paris law with uper-bound coefficients. The predicted growth rate was mostin the redundant box-sections and the single non-redundant panels. The models developed in these projects can be easilyreproduced and used to asses the remaing life of ships with large cracks.

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