| 裂纹前端局部加强板的韧性断裂分析 |
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| 引用本文： | 姜翠香,李克勤.裂纹前端局部加强板的韧性断裂分析[J].船舶力学,2008,12(6):965-972. |
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| 作者姓名： | 姜翠香 李克勤 |
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| 作者单位： | 武汉科技大学理学院,武汉,430065;湖北工业大学机械工程学院,武汉,430068 |
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| 基金项目： | Supported by the Project Fund of the Hubei Province Key Laboratory of Mechanical Transmission and Manufacturing Engineering of Wuhan University of Science andTechnology |
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| 摘 要： | 对局部加强含裂纹板的弹塑性断裂问题进行了分析计算.建立了裂纹前端局部加强的裂纹板弹塑性分析的Dug-dale模型,以裂纹尖端开口位移CTOD为断裂参数,就加强复板位置、结构参数及加强复板与裂纹板材料参数等因素对结构止裂性能的影响进行了分析计算.结果表明,在裂纹前端进行局部加强使裂纹尖端的塑性区长度减小,且降低了裂纹尖端的开口位移CTOD,能有效地阻止裂纹扩展.提高加强复板相对刚度有利于改善裂纹尖端状态,提高结构的承载能力.
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| 关 键 词： | 裂纹加强板 韧性断裂 CTOD 止裂 |
Ductile Fracture Analysis on a Cracked-Stiffened Plate |
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| JIANG Cui-xiang,LI Ke-qin.Ductile Fracture Analysis on a Cracked-Stiffened Plate[J].Journal of Ship Mechanics,2008,12(6):965-972. |
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| Authors: | JIANG Cui-xiang LI Ke-qin |
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| Institution: | JIANG Cui-xiang 1,LI Ke-qin2(1 College of Science,Wuhan University of Science , Technology,Wuhan 430065,China,2 School of Mechanical Engineering,Hubei University of Technology,Wuhan 430068,China) |
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| Abstract: | Solutions to the ductile fracture are presented for cracked-stiffened plate subjected to mode I loading.The Dugdale model of a crack is constructed.The Dugdale solutions for the plastic zone size and CTOD(Crack Tip Opening Displacement) are obtained by using a discrete cracked-stiffened plate model.A parametric study involving the stiffener location,stiffener relative stiffness is reported.The arresting efficiency is studied for a stiffener on retarding the growth of an elastic-plastic crack.The numerical r... |
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| Keywords: | CTOD cracked-stiffened plate ductile fracture CTOD crack arrest |
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