Yasuaki Hashikura, Koji Takahashi, Yuji Miyazaki, Keiji Houjou and Kotoji Ando
The purpose of this paper is to study the effects of overload on the threshold stress intensity factor range (ΔKth) in SUS316.
Abstract
Purpose
The purpose of this paper is to study the effects of overload on the threshold stress intensity factor range (ΔKth) in SUS316.
Design/methodology/approach
The 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.
Findings
It is clarified that the value of ΔKth increases as increasing the overloading.
Research limitations/implications
The 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/value
As a result, the reliability and safety of structures, such as energy plants, can also be improved.