{"title":"Prediction of fatigue crack propagation in bulb-flat by experimental and numerical method","authors":"Z. Dang, J. Yue, Wengang Mao","doi":"10.3969/J.ISSN.1007-7294.2018.07.011","DOIUrl":null,"url":null,"abstract":"The fatigue crack propagation in the bulb-flat, which is widely used in ship and bridge engineer ing, is one of the basic parameters for structures'fatigue life prediction. In this paper, the shape of a three dimensional surface crack in full-scale bulb-flat was measured and estimated by Nominalization Crack Opening Displacement (NCOD) method. Then the obtained crack shape was used to predict the fatigue crack propagation in the bulb-flat based on the two dimensional Paris formula and the Linear Finite Element Analysis (LFEA) method. Finally, the predicted fatigue crack propagation was verified by the full-scale fa tigue test on a typical ship structure in detail. This method proposed in this paper may provide reference to the definition of failure criterion of bulb-flat.","PeriodicalId":52534,"journal":{"name":"船舶力学","volume":"22 1","pages":"873-881"},"PeriodicalIF":0.0000,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"船舶力学","FirstCategoryId":"1087","ListUrlMain":"https://doi.org/10.3969/J.ISSN.1007-7294.2018.07.011","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Engineering","Score":null,"Total":0}
引用次数: 0
Abstract
The fatigue crack propagation in the bulb-flat, which is widely used in ship and bridge engineer ing, is one of the basic parameters for structures'fatigue life prediction. In this paper, the shape of a three dimensional surface crack in full-scale bulb-flat was measured and estimated by Nominalization Crack Opening Displacement (NCOD) method. Then the obtained crack shape was used to predict the fatigue crack propagation in the bulb-flat based on the two dimensional Paris formula and the Linear Finite Element Analysis (LFEA) method. Finally, the predicted fatigue crack propagation was verified by the full-scale fa tigue test on a typical ship structure in detail. This method proposed in this paper may provide reference to the definition of failure criterion of bulb-flat.
期刊介绍：
Journal of Ship Mechanics (monthly) was founded in 1997. It is a professional academic journal jointly sponsored by China Ship Science Research Center and China Society of Naval Architecture and published at home and abroad. Its purpose is to disseminate and accumulate scientific and technological achievements in ship and ocean engineering mechanics, promote scientific and technological exchanges and achievement transformation, promote discipline development, and serve the national economy and scientific research and production. The main columns of this journal include: fluid mechanics; structural mechanics; fluid and structural acoustics; research review. It focuses on publishing innovative scientific research results and research progress reviews in fluid mechanics, structural mechanics, fluid and structural acoustics in the field of ship and ocean engineering.
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