Overloading effect on the fatigue threshold stress intensity factor range (ΔKth) as a function of crack length in SUS316
Author:
Hashikura Yasuaki,Takahashi Koji,Miyazaki Yuji,Houjou Keiji,Ando Kotoji
Abstract
PurposeThe purpose of this paper is to study the effects of overload on the threshold stress intensity factor range (ΔKth) in SUS316.Design/methodology/approachThe fatigue tests are carried out to determine the resultant threshold stress intensity factor range (ΔKth). The mechanism of the improvement of ΔKth by the tensile overloading is analyzed using the Dugdale model.FindingsIt is clarified that the value of ΔKth increases as increasing the overloading.Research limitations/implicationsThe apparent value of ΔKth of stainless steel can be improved by a tensile overload, the fatigue strength of structural members that have a surface crack can be increased by a tensile overload.Originality/valueAs a result, the reliability and safety of structures, such as energy plants, can also be improved.
Subject
Mechanical Engineering,Mechanics of Materials,Civil and Structural Engineering
Reference10 articles.
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