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International Journal of Automotive Technology > Volume 22(3); 2021 > Article
International Journal of Automotive Technology 2021;22(3): 579-584.
doi: https://doi.org/10.1007/s12239-021-0054-y
ASSESSING THE ESTIMATED LIFE OF UD DRUM OF AUTOMATIC TRANSMISSION USING MATERIAL PROPERTIES EVALUATED BY STRESS RUPTURE TESTING
Jung-Jun Lee1, Sungki Choi1,2, Chan Pyoung Park1, Park Kwon1
1Seoul National University
2VSB-Technical University of Ostrava
PDF Links Corresponding Author.  Jung-Jun Lee , Email. ljjsnus0@snu.ac.kr
ABSTRACT
High-cycle fatigue testing under different stress conditions must be performed in fatigue test methodology, and this requires expenditure both of money and time. The high-cycle fatigue test methodology also has the limitation of being a statistical approach to assessing estimated life that is not based on material properties. Thus to evaluate the estimated life of structural materials in transmissions in use, we need a novel assessment method that is economical, effective, easy to apply, and based on the material properties. In this study, we derive the relation between rupture stress and tensile properties taking into account fatigue rupture time, and developed a methodology for evaluating the estimated life of structural materials of transmission. Using this methodology, we performed stress rupture and fatigue tests for automatic transmission UD drum steels.
Key Words: Material property, High cycle fatigue test, Estimated life, Stress rupture test, Auto transmission
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