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A Study on Accelerated Life Prediction Automation of Gas Welded Joint of STS301L (Plug and Ring Type)  

Baek, Seung-Yeb (Department of Mechanical Design, Daelim University)
Sohn, Il-Seon (Automotive and Mechanical Division, Osan University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.19, no.3, 2011 , pp. 1-8 More about this Journal
Abstract
Stainless steel sheets are widely used as the structure material for the railroad cars and the commercial vehicles. These kinds structures used stainless steel sheets are commonly fabricated by using the gas welding. Gas welding is very important and useful technology in fabrication of an railroad car and vehicles structure. However fatigue strength of the gas welded joints is considerably lower than parent metal due to stress concentration at the weldment, fatigue strength evaluation of gas welded joints are very important to evaluate the reliability and durability of railroad cars and to establish a criterion of long life fatigue design. In this paper, ${\Delta}-N_f$ curve were obtained by fatigue tests. Using these results, the accelerated life test (ALT) is conducted. From the experimental results, an acceleration model is derived and acceleration factors are estimated. So it is intended to obtain the useful information for the fatigue lifetime of plug and ring gas welded joints and data analysis by statistical reliability method, to save time and cost, and to develop optimum accelerated life prediction plans.
Keywords
Fatigue strength; Gas welding; Acceleration Factor; Acceleration model; Accelerated life test;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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