| 基于有限元的非共线边裂纹相互影响研究 |
| |
| 引用本文： | 周斌,孙鹏,周蜜,梁科.基于有限元的非共线边裂纹相互影响研究[J].科学技术与工程,2016,16(13). |
| |
| 作者姓名： | 周斌 孙鹏 周蜜 梁科 |
| |
| 作者单位： | 中国民用航空飞行学院 航空工程学院,中国民用航空飞行学院 航空工程学院,中国民用航空飞行学院 航空工程学院,中国民用航空飞行学院 航空工程学院 |
| |
| 基金项目： | 国家自然科学基金民航联合基金 |
| |
| 摘 要： | 薄壁结构是飞机中常用的工程结构。薄板中裂纹将直接影响结构的剩余强度。当薄板结构含有多个裂纹时,其强度分析过程复杂。利用有限元分析方法对含有两等长非共线边裂纹的有限宽板进行了系统分析。通过与共线边裂纹情况对比,提出了合适的应力强度因子K_Ⅰ的修正系数F_1。同时,分析了裂纹相对位置对应力强度因子K_Ⅱ的影响,当两裂纹相对方位角为18.8°时,K_Ⅱ取最大值,而该最大值的大小仅仅与板宽w与裂纹长度a的比值w/a有关。结果为估算含有该类裂纹结构的剩余强度及裂纹扩展行为提供方便快捷的方法。
|
| 关 键 词： | 边裂纹 应力强度因子 修正系数 有限元 |
| 收稿时间： | 2016/1/14 0:00:00 |
| 修稿时间： | 2016/4/19 0:00:00 |
Investigation of Influence between Two Non-Collinear Edge Cracks through Finite Element Analysis |
| |
| ZHOU Bin,SUN Peng,ZHOU Mi and LIANG Ke.Investigation of Influence between Two Non-Collinear Edge Cracks through Finite Element Analysis[J].Science Technology and Engineering,2016,16(13). |
| |
| Authors: | ZHOU Bin SUN Peng ZHOU Mi and LIANG Ke |
| |
| Institution: | Aviation Engineering Institute,Civil Aviation Flight University of China,Aviation Engineering Institute,Civil Aviation Flight University of China,Aviation Engineering Institute,Civil Aviation Flight University of China |
| |
| Abstract: | Thin-walled structure is widely used in aircraft. The cracks on this type of structure can profoundly influence their strength. In this paper, the finite width plates with two non-collinear edge cracks are investigated through finite element analysis. Compared to the collinear cracks model, the correct coefficient F1 is proposed for the stress intensity factor KI. The result also shows that the stress intensity factor KII reaches the maximum value when the two cracks are located in the special relative direction of 18.8°, and the maximum is only depend on the parameter w/a. All these results supply a simplified method to evaluating the residual strength and the propagation direction of cracks for plates with such type cracks. |
| |
| Keywords: | edge crack stress intensity factor correction coefficient finite element analysis |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《科学技术与工程》浏览原始摘要信息 |
| 点击此处可从《科学技术与工程》下载免费的PDF全文 |
|
