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자동차용 윤활유의 내구성평가에 따른 물성 및 기관성능에 관한 연구
Inhyuk Choi(최인혁),Gooksun Lee(이국선),Sungho Cho(조성호) 한국트라이볼로지학회 2008 한국트라이볼로지학회 학술대회 Vol.2008 No.6
Torsional Fatigue Life (TFL) tests were performed for five kinds of Overdrive Clutch Shafts. Four kinds of shaft samples were manufactured using different materials and heat treatments to evaluate cost and fatigue life. Commercial product was also studied for comparison. TFL tests were then conducted under the torque values 70, 55, 45, 40 ㎏.m and the cycle 10Hz for T-N curves. The results of TFL test indicated long fatigue life achievable in the specimen that has high surface hardness and small grain microstructure. Newly improved shaft showed 100-250% improvement in fatigue life compared to commercial shaft and its predicted durability exceeded cumulative damage from the transmission endurance test