Parameter Sensitivity Analysis of Stress Intensity Factor of Corner Crack at Dimple Hole
-
摘要: 针对工程中常见的锪窝铆接结构,借助大型软件ANSYS对其孔边角裂纹进行有限元分析。通过改变结构几何厚度和锪窝孔的高度,研究含铆钉填充时锪窝孔边角裂纹应力强度因子的参数敏感性。通过对比分析,发现锪窝孔边角裂纹前沿应力强度因子与锪窝高度正相关,与结构厚度负相关;当锪窝高度与结构厚度之比为定值且大于0.5时,按比例同时改变锪窝高度与结构几何厚度,裂纹前沿应力强度因子可近似认为相同。Abstract: This paper applies ANSYS to implement the finite element analysis for the corner crack of the dimple riveting structure, which is a common structure in practice. By changing the structure's geometric thickness and the height of the dimple hole, the parameter sensitivity of the stress intensity factor is studied. The results of comparative analysis show that the crack front stress intensity factor of the dimple is proportional to the height of the dimple, and is inversely proportional to the structure thickness; and also, when the proportion of the dimple height to the structural thickness is a constant over 0.5, the front stress intensity factor of the crack can be approximately regarded as the same, if the dimple height and the structure thickness are synchronously and proportionally changed.
-
Key words:
- corner crack /
- dimple hole /
- finite element analysis
-
[1] 沈海军,郭万林.锪窝孔边扇形角裂纹应力强度因子的三维有限元分析[J].航空学报,2002,23(2):106-110 Shen H J, Guo W L. 3D finite element analysis of SIF of the structure with dimple hole[J]. Acta Aeronautica Et Astronautica Sinica,2002,23(2):106-110 (in Chinese) [2] 王立清.工程中含接触问题的孔边裂纹应力强度因子数值研究[D]. 哈尔滨: 哈尔滨工业大学, 2009 Wang L Q. Numerical investigation of stress intensity factors for hole-edge cracks involving contact problem in engineering [D]. Harbin:Harbin Institute of Technology,2009 (in Chinese) [3] De Rijck J J M, Fawaz S A. Stress intensity factor solutions for countersunk holes subjected to tension, bending and pin loading[R]. Sixth Joint DoD/FAA/NASA Conference on Aging Aircraft,2002 [4] 屠少威,黄其青,郭今,等.锪窝填充孔孔边角裂纹应力强度因子的有限元分析[J].航空工程进展,2012,3(2):195-200 Tu S W, Huang Q Q, Guo J, et al. Stress intensity factor finite element analysis of corner crack at rivet-filled countersink hole[J]. Advances In Aeronautical Science And Engineering,2012,3(2):195-200 (in Chinese) [5] 沈海军,郭万林.飞机谱载下铝合金锪窝孔结构腐蚀疲劳研究[J].力学学报,2003,35(1):21-25 Shen H J, Guo W L. Corrosive fatigue of structures with dimple holes under spectrum loading[J]. Acta Mechanica Sinica,2003,35(1):21-25 (in Chinese) [6] 王锋,黄其青,殷之平.三维裂纹应力强度因子的有限元计算分析[J].航空计算技术,2006,36(3):125-127 Wang F, Huang Q Q, Yin Z P. Analysis of emulational limited element method for three-dimensional stress intensity factors [J]. Aeronatical Computing Technique,2006,36(3):125-127 (in Chinese) [7] 沈成康.断裂力学[M].上海:同济大学出版社,1996 Shen C K. Fracture mechanics [M]. Shanghai:Tongji University,1996 (in Chinese) [8] 中国航空研究院.应力强度因子手册[M].北京:科学出版社,1993 China Aviation Academy. Handbook of stress intensity factors[M]. Beijing:Science Press,1993 (in Chinese)
点击查看大图
计量
- 文章访问数: 144
- HTML全文浏览量: 33
- PDF下载量: 6
- 被引次数: 0