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철도차량 가스용접 이음재의 피로설계를 위한 최적 파라메타 연구
백승엽(Seungyeb Baek),배동호(Dongho Bae) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
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. For fatigue design of gas welded joints such as fillet and plug and ring type joint, it is important to obtain optimum design parameter information on gas welded joints. In this paper, analysis approach for fatigue test using experimental design are evaluated optimum factor in gas welded joint type and geometrical parameters of materials. Using these results, that factors applied to fundamental information for fatigue design.
STS301L 가스용접이음재의 가속수명예측에 관한 연구
백승엽(Seungyeb Baek),배동호(Dongho Bae) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
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, △-N<SUB>f</SUB> 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 statistic reliability method, to save time and cost, and to develop optimum accelerated life prediction plans.
철도차량 가스용접 이음재의 피로설계를 위한 최적 파라메타 연구
백승엽(Seungyeb Baek),배동호(Dongho Bae) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
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. For fatigue design of gas welded joints such as fillet and plug and ring type joint, it is important to obtain optimum design parameter information on gas welded joints. In this paper, analysis approach for fatigue test using experimental design are evaluated optimum factor in gas welded joint type and geometrical parameters of materials. Using these results, that factors applied to fundamental information for fatigue design.
백승엽(Seungyeb Baek),배동호(Dongho Bae) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Stainless steel sheets are widely used as the structural material for the railroad cars and the commercial vehicles. These kinds structures used stainless steel sheets are commonly fabricated by using the gas welding. For fatigue design of gas welded joints such as fillet and plug type joint, it is necessary to obtain design information on stress distribution at the weldment as well as fatigue strength of gas welded joints. And also, the influence of the geometrical parameters of gas welded joints on stress distribution and fatigue strength must be evaluated. Thus, in this paper, △P-Nf curves were obtained by fatigue tests. Using these results, △P-Nf curves were rearranged in the △σ-Nf relation with the hot spot stresses at the gas welded joints.
STS301L 가스용접이음재의 가속수명예측 기법 (1.Fillet type)
백승엽(Seungyeb baek),배동호(Dongho Bae) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
stainless steel sheets are widely used as the structural material for the railroad cars and the commercial vehicles. These kinds structures used stainless steel sheets are commonly fabricated by using the gas welding, For fatigue design of gas welded joints such as fillet type joint. It is necessary to obtain design information on stress distribution at the weldment as well as fatigue strength of gas welded joints. And also, the influence of the geometrical parameters of gas welded joints on stress distribution and fatigue strength must be evaluated. Thus, in this paper, ΔP-Nf curves were obtained by fatigue tests. and, ΔP-Nf curves were rearranged in the Δσ-Nf 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 acceleration model is derived and factors are estimated. So it is intended to obtain the useful information for the fatigue lifetime of fillet welded joints and data analysis by statistic reliability method , to save time and cost, and to develop optimum accelerated life prediction plans.