Failure analysis and prevention of a brake nave on a landing gear

✍ Scribed by Xi Niansheng; Zhong Peidao; Tao Chunhu

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 649 KB
• Volume: 3
• Category: Article
• ISSN: 1350-6307
• DOI: 10.1016/1350-6307(96)00010-6

✦ Synopsis

The leakage failure of a brake nave on a landing gear has been investigated. A crack initiating at the transitional region and propagating as deep as the blind gas hole was responsible for the leakage. Rough machining marks and an incomplete protective coating were found near the crack. Examinations revealed that brittle and tough fracture features existed alternately in the fracture surface. Analysis results show that the crack grew by transgranular stress corrosion, promoted by the stress concentration and poor surface conditions. Similar failures have been avoided by adopting the preventive actions detailed in this paper.