Detailed Information
Metadata Downloads
선박용 디젤 주기관 스터드볼트의 피로파괴 안전성에 관한 연구
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | 김태형 | - |
| dc.date.accessioned | 2017-02-22T06:20:56Z | - |
| dc.date.available | 2017-02-22T06:20:56Z | - |
| dc.date.issued | 2007 | - |
| dc.date.submitted | 56850-02-09 | - |
| dc.identifier.uri | http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002175208 | ko_KR |
| dc.identifier.uri | http://repository.kmou.ac.kr/handle/2014.oak/9380 | - |
| dc.description.abstract | Bolting is widely spreaded for its reliability, productivity, cost and easy-dismantling process for repair and exchange. Cylinder cover is fastened with cylinder block by the stud bolts placed at the upper part of cylinder liner. Stud bolt for cylinder cover is repeatedly given axial forces from the initial fastening torque and explosion pressure as variable load from the combustion chamber. Because variable stress conditions cause stress concentration on the screw threads, factors such as allowable stress and limitation of the stress concentration should be decided at the stage of design for minimizing fatigue failure caused by stress concentration and for selecting proper bolt materials and sizes. From the research, presumed the number of cycles for variable stress generated on stud bolt for the expecting design life by modeling MAN B&W 12K98MC-C engine. And collected and analyzed other fatigue test results of stud material, High Tensile Alloy Steel(SNCM439). The statistical analysis of research results presents (10% failure probability)fatigue strength equation which can explain effects of what influence stress concentration factor and stress ratio have on fatigue strength. Furthermore, theoretical calculation of FEM modeling program makes it possible to obtain each values of stress concentration. The cumulative damage factor based on Miner-Palmgren hypothesis is used for the practical procedure of fatigue life prediction. Also, the quantitative safety analysis of fatigue failure of the stud bolt for cylinder cover can be done, and then results are reflected for the design optimization. | - |
| dc.description.tableofcontents | 1. 서론 = 6 1.1 연구의 배경 = 6 1.2 연구의 목적 및 내용 = 9 2. 이론 해석 = 10 2.1 실린더커버 스터드볼트의 체결 및 구조 = 10 2.2 피로파괴 = 12 2.2.1 피로설계의 기본개념 = 12 2.2.2 피로하중의 형태 = 15 2.2.3 피로수명과 내구한도의 정의 = 17 2.3 피로해석 방법 = 19 2.3.1 선형누적손상계수의 정의 = 19 2.4 피로균열발생수명에 영향을 미치는 요소 = 20 2.4.1 평균응력의 영향 = 20 2.4.2 응력 집중계수(Kt)의 영향 = 22 2.4.3 스터드볼트의 응력해석 = 24 3. 스터드볼트의 피로파괴 안전성 평가 = 27 3.1 평가 모델 = 27 3.2 재료의 화학적, 기계적 성질 = 29 3.3 변동응력의 사이클 수 평가 = 30 3.4 응력의 해석 = 31 3.4.1 이론식에 의한 변동응력 = 31 3.4.2 나사산부의 응력집중계수 = 33 3.5 실린더커버 스터드볼트의 피로강도 = 36 3.5.1 P-S-N곡선 = 36 3.5.2 응력집중의 영향을 고려한 P-S-N 곡선의 수정 = 40 3.5.3 응력비(평균응력)의 영향을 고려한 P-S-N 곡선의 수정 = 43 3.6 피로강도설계의 평가 = 45 4. 결론 = 48 참고문헌 = 49 감사의 글 = 51 | - |
| dc.language | kor | - |
| dc.publisher | 한국해양대학교 대학원 | - |
| dc.title | 선박용 디젤 주기관 스터드볼트의 피로파괴 안전성에 관한 연구 | - |
| dc.title.alternative | A Study on the Safety of Fatigue Fracture of Stud Bolt for Marine Diesel Engine | - |
| dc.type | Thesis | - |
| dc.date.awarded | 2007-02 | - |
| dc.contributor.alternativeName | Kim | - |
| dc.contributor.alternativeName | Tae-Hyung | - |
- Files in This Item:
- 000002175208.pdf Download
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.