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http://dx.doi.org/10.6108/KSPE.2019.23.4.042

Storage Reliability Assessment of Springs for Turbo Engine Components  

Chang, Mu-Seong (Department of Reliability Assessment, Korea Institute of Machinery and Materials)
Lee, Choong-Sung (Department of Reliability Assessment, Korea Institute of Machinery and Materials)
Park, Jong-Won (Department of Reliability Assessment, Korea Institute of Machinery and Materials)
Kim, You-Il (The 4th R&D Institute, Agency for Defense Development)
Kim, Sun Je (The 4th R&D Institute, Agency for Defense Development)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.23, no.4, 2019 , pp. 42-49 More about this Journal
Abstract
This paper presents a method to predict the storage reliability of springs for turbo engine components based on an accelerated degradation test. The reliability assessment procedure for springs is established to proceed with the accelerated degradation test. The spring constant is selected as the performance degradation characteristic, the temperature is determined to be the stress factor that deteriorates the spring constant. The storage tests are performed at three temperature test conditions. The spring constant is measured periodically to check the degradation status of the springs. Failure times of the springs are predicted by using the degradation model. Finally, the storage lifetime of the springs at normal use conditions is predicted using an accelerated model and failure times of all test conditions.
Keywords
Storage Reliability; Accelerated Degradation Test; Arrhenius Model; Spring; Turbo Engine;
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