Madan, M and Sujata, M and Bhaumik, SK (2011) Failure analysis of O-rings. Project Report. National Aerospace Laboratories, Bangalore, India.Full text not available from this repository.
Two failed O-rings from the electro selector assembly belonging to an aircraft were sent to this laboratory for investigation. Examination showed that in both the O-rings, loss of material occurred by wear over a period of time. The wear pattern and the morphology of the worn out surface indicated that there was looseness in the O-rings which resulted in improper seating of the O-rings on the groove. Because of this, during motion of the piston, a sector of the rings had undesirable contact with the moving surfaces leading to accelerated wear on a sector of the rings. Analysis suggests that the failure was facilitated due to oversize of the O-rings and/or undersize of the groove on the piston. Evidences do not suggest any deficiencies in the material and/or deterioration in the material in service responsible for the failure.
|Item Type:||Proj.Doc/Technical Report (Project Report)|
|Uncontrolled Keywords:||Electro-selector assembly;O-rings; wear failure|
|Subjects:||AERONAUTICS > Aeronautics (General)|
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
|Division/Department:||Materials Science Division, Materials Science Division, Materials Science Division|
|Depositing User:||Ms. Alphones Mary|
|Date Deposited:||08 Jul 2011 13:41|
|Last Modified:||08 Jul 2011 13:41|
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