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http://dx.doi.org/10.5762/KAIS.2015.16.7.4398

A Study on Reliability Design of Fracture Mechanics Method Using FEM  

Baik, Seung-Yeb (Dept. of Mechanical Engineering, Yeungjin College)
Lee, Bong-Gu (Division of Mechanical Engineering, Yeungnam University College)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.16, no.7, 2015 , pp. 4398-4404 More about this Journal
Abstract
Stainless steel sheets are widely used as the structural material for dynamic machine structures, These kinds structures used stainless steel sheets are commonly fabricated by using the gas welding, For fatigue design of gas welded joints such as various type joint. It is necessary to obtain design information on stress distribution at the weldment as well as fatigue strength of gas welded joints. Thus in this paper, ${\Delta}P-N_f$ curves were obtained by fatigue tests. and, ${\Delta}P-N_f$ curves were rearranged in the ${\Delta}{\sigma}-N_f$ relation with the hot spot stresses at the gas welded joints. Using these results, the accelerated life test(ALT) is conducted. From the experiment results, an life prediction model is derived and factors are estimated. So it is intended to obtain the useful information for the fatigue lifetime of welded joints and data analysis by statistic reliability method, to save time and cost, and to develop optimum accelerated life prediction plans.
Keywords
Fatigue Design Criterion; Accelerated Life Test; Life Prediction; Reliability;
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