锪窝孔边角裂纹应力强度因子参数敏感性分析
Parameter Sensitivity Analysis of Stress Intensity Factor of Corner Crack at Dimple Hole

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。
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