가속수명시험을 위한 KTX고속열차 구조물의 S-N 선도 추정S-N Curve Deduction of a KTX High-Speed Train Structure for an Accelerated Life Testing
- Other Titles
- S-N Curve Deduction of a KTX High-Speed Train Structure for an Accelerated Life Testing
- Authors
- 정달우; 최낙삼; 박수한
- Issue Date
- Apr-2009
- Publisher
- 대한기계학회
- Keywords
- 레인플로우 집계; 가속수명시험; 누적손상법; S-N선도 추정; 등가하중; Rainflow Counting; Accelerated Life Testing; Miner' s Rule; S-N Curve Deduction; Equivalent Stress
- Citation
- 대한기계학회논문집 A, v.33, no.4, pp.388 - 395
- Indexed
- SCOPUS
KCI
- Journal Title
- 대한기계학회논문집 A
- Volume
- 33
- Number
- 4
- Start Page
- 388
- End Page
- 395
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/41679
- DOI
- 10.3795/KSME-A.2009.33.4.388
- ISSN
- 1226-4873
- Abstract
- An accelerated fatigue test is essentially required to maintain the reliability of the actual structures of KTX under operation conditions. However, actual fatigue life cannot be obtained because the conventional fatigue tests are not adequate to the real load conditions. Moreover foreign component makers have not provided data of the loading stresses (S) versus cycles at the failure (N). In this study, we suggested a deduction method of the S-N curve for establishing an accelerating test under various load levels. Load history was acquired from the field tests. A Rainflow method was used on the cycle counting of the field load data. After that, an S-N curve was obtained through the iteration process under the condition that the damage index satisfies to 1 in the Miner's rule. The deduced S-N curve was applied to the performance evaluation of Korean-made sealed knuckles compared with imports.
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