摘要
基于平板表面裂纹应力强度因子的表达式及圆筒穿透裂纹的鼓胀系数，提出了支柱外筒周向表面裂纹的鼓胀系数反应力强度因子计算方法。还介绍了在工作环境中所用计算疲劳裂纹扩展公式。
t was found in fatigue experiments to main landing gears that circular surface cracks occur on the shock absorbing cylider of the struts and propagate rapidly. For estimating the propagtion life of the cracks this paper presents calculating methods of a swell factor and stress intensity factor of circular surface cracks on the cylinder. These are based on formulas of stress intensity factors of surface cracks of plates and swell factors of through cracks of cylinders. This paper recommends calculating formulas of fatigue crack propagation in service environment and gives relevant parameters’ values of 30CrMnSiNi2A.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1994年第2期228-231,共4页
Acta Aeronautica et Astronautica Sinica
关键词
起落架
圆柱体
裂纹扩展
landing gear,cylinder,crack propagation
