| 中心斜裂纹矩形薄板的极限断裂强度分析 |
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| 引用本文： | 王芳,刘强,黄小平,崔维成.中心斜裂纹矩形薄板的极限断裂强度分析[J].船舶力学,2006,10(3):92-100. |
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| 作者姓名： | 王芳 刘强 黄小平 崔维成 |
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| 作者单位： | 上海交通大学船舶海洋与建筑工程学院,上海,200030;中国船舶科学研究中心,江苏,无锡,214082 |
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| 摘 要： | 对具有中心穿透斜裂纹在弹性断裂和完全塑性断裂两种破坏模式下的断裂强度进行了分析.在弹性破坏模式下,利用应变能密度因子准则对不同的裂纹倾斜角和不同的矩形板长宽比对斜裂纹的初始扩展角度的影响进行了数值计算和讨论.对于延性材料的完全塑性断裂模式,利用弹塑性有限元对不同裂纹倾斜角下的矩形板的极限拉伸强度进行了分析,并对中心穿透裂纹拉伸强度简化计算公式进行了考虑裂纹倾斜角度的修正.
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| 关 键 词： | 斜裂纹 初始扩展角度 SED准则 有限元分析 极限断裂强度 屈强比 |
| 文章编号： | 1007-7294（2006）03-0092-09 |
| 收稿时间： | 2005-11-06 |
| 修稿时间： | 2005-11-06 |
Ultimate Fracture Strength Analysis of Thin Rectangular Plate with Inclined Center Crack |
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| WANG Fang,LIU Qiang,HUANG Xiao-ping,CUI Wei-cheng.Ultimate Fracture Strength Analysis of Thin Rectangular Plate with Inclined Center Crack[J].Journal of Ship Mechanics,2006,10(3):92-100. |
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| Authors: | WANG Fang LIU Qiang HUANG Xiao-ping CUI Wei-cheng |
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| Institution: | School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University,Shanghai 200030, China;School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University,Shanghai 200030, China;School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University,Shanghai 200030, China;China Ship Scientific Research Center,Wuxi,214082,China |
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| Abstract: | The fracture strength of rectangular plate with inclined crack is analyzed considering two failure modes of elastic fracture and fully plastic failure respectively. The initial crack angle of inclined crack is discussed using strain energy density criteria and the effects of inclined crack angle and the aspect ratio of plate on initial fracture direction are analyzed by finite element analysis system of ANSYS for ideally elastic material. And for ductile material,yielding failure usually takes place before macro cracking in the vicinity of initial crack tips. An elasto-plastic finite element analysis is carried out to exhibit the effects of initial inclined crack angle on the ultimate tensile strength of the plate and the experiential formula is consequently put forward considering the angle effect. |
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| Keywords: | inclined crack initial crack angle SED criterion finite element analysis ultimate fracture strength yield ratio |
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