飞机起落架扭力臂上轴裂纹分析  

ANALYSIS OF CRACK ON TORQUE FORCE ARM UPPER SPINDLE OF UNDERCARRIAGE

作　　者：胡小华[1] 马林[1] 陈兴安[1] 

机构地区：[1]中国人民解放军驻三二○厂军事代表室,南昌330024

出　　处：《上海金属》2009年第2期21-23,31,共4页Shanghai Metals

摘　　要：某飞机起落架扭力臂上轴在使用后发生裂纹。为了确定该上轴裂纹的原因,对存在裂纹上轴进行了外观检查,断口宏观、微观分析,化学成分分析,金相组织检查、硬度检测以及氢含量测定。结果表明:上轴裂纹是在较大的表面剪切摩擦应力与扭转应力的共同作用下发生的开裂,裂纹开裂后以应力腐蚀的方式扩展。The crack on torque force arm upper spindle of undercarriage appeared after using. In order to find the reason caused the crack, several testing was performed on the crack of the upper spindle, including exterior appearance inspection, macroscopy and microscopy analysis of fracture, analysis of chemical component, metallographical analysis, hardness detection and measurement of hydrogen content. The results indicated that the shear friction stress and distorting stress, and the crack was caused by the mutual actions both surface cracks developed in the way of stress corrosion.

关 键 词：起落架扭力臂 上轴 裂纹 应力腐蚀 

分 类 号：TG146.21[一般工业技术—材料科学与工程] V226[金属学及工艺—金属材料]