Effect of Overload on the Threshold Stress Intensity Factor Range of SUS316 as a Function of Crack Size
Keyword(s):
The effects of overload on the threshold stress intensity factor range (ΔKth) in SUS316 were studied. Tensile overload was applied to a CT(Compact tensiton) specimen of SUS316. Then, fatigue tests were carried out to determine the resultant threshold stress intensity factor range (ΔKth). The mechanism of the improvement of ΔKth by the tensile overloading was analyzed using the Dugdale model. It was clarified that the value of ΔKth increases as increasing the overloading. The compressive residual stress intensity factor (Kr) is the key factor controlling the value of ΔKth.
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