球茎扁体疲劳裂纹扩展的实验与数值预测

Q4 Engineering

船舶力学 Pub Date : 2018-01-01 DOI:10.3969/J.ISSN.1007-7294.2018.07.011

Z. Dang, J. Yue, Wengang Mao

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引用次数: 0

摘要

球扁体的疲劳裂纹扩展是预测结构疲劳寿命的基本参数之一，在船舶和桥梁工程中得到了广泛的应用。本文采用命名裂纹张开位移法(NCOD)对全尺寸球型平板的三维表面裂纹形状进行了测量和估计。然后，基于二维Paris公式和线性有限元分析方法，将得到的裂纹形状用于预测球杆平板的疲劳裂纹扩展。最后，通过典型舰船结构的全尺寸疲劳试验，详细验证了疲劳裂纹扩展的预测结果。本文提出的方法可为扁球失效判据的确定提供参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Prediction of fatigue crack propagation in bulb-flat by experimental and numerical method

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.

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来源期刊

船舶力学 Engineering-Ocean Engineering

CiteScore

0.80

自引率

0.00%

发文量

3136

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.