根据波音737CL飞机龙骨梁ADF环形天线组件固定孔区域的剥蚀特征, 采用有限元分析和盐雾环境暴露试验研究了正应力在剥蚀中的作用. 结果表明, 纵向L方向及长横向LT方向压应力可加速7150铝合金的剥蚀的形成和扩展; L方向、LT方向拉应力以及短横向ST方向压应力抑制合金的剥蚀的形成和扩展.
Based on an investigation of the exfoliation corrosion (EFC) evolution around ADF antenna installing holes on aluminum alloy 7150-T77511 keel beam for aircraft B737CL, the effect of axial stress on the EFC was studied by means of finite element analysis and corrosion test in salt fogging environment. The results showed that compressive stress along directions L and LT accelerated EFC, whilst tensile stress along directions L and LT, and compressive stress along direction ST retarded EFC.
参考文献
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| [5] | Boeing Industry. 737-300/400/500 Structure Repair Manual[S]. Seattle: 2009.[2] 中国民用航空局. 航空器结构持续完整性大纲AC121-65[S]. 北京:2005.[3] 黄昌龙, 万小朋. 波音737CL龙骨梁BS535区域腐蚀规律[J].南昌航空工业学院学报(自然科学版), 2010, 24(3): 39.[4] |
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