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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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This study derives load characteristics and analyzes the safety of plowshares operating in dry fields. We mounted a three-blade, reversible plow on a 23.7 kW tractor and measured the plow’s tractive force as well as the torque from the engine output shaft on the rear axle under various working speeds (L4, M1, M2, M3). We chose a Korean test site of Seomyeon, Chuncheon with sandy soil texture, as determined using the USDA method.
We constructed the load spectrum for torque and tractive force using measured data and derived the fatigue life of the plowshare from a stress-cycle (S-N) curve of the plow material. Our results show that the M3 gear maximizes the driving shaft torque loads and, applying the tractive force load spectrum, creates a cumulative damage sum of 4.14x10-5. Considering sampling time, we estimate a fatigue life of 805 hours while using the M3 gear. When using the other working speeds, however, all of the stress levels fell within the endurance limits and, therefore, our model predicts infinite plowshare lifetimes. For this analysis, we used a yield strength of 1,079 MPa for the plowshare and static safety factors, analyzed using the maximum stress, between 6.83 and 8.63 under each working speed.
We constructed the load spectrum for torque and tractive force using measured data and derived the fatigue life of the plowshare from a stress-cycle (S-N) curve of the plow material. Our results show that the M3 gear maximizes the driving shaft torque loads and, applying the tractive force load spectrum, creates a cumulative damage sum of 4.14x10-5. Considering sampling time, we estimate a fatigue life of 805 hours while using the M3 gear. When using the other working speeds, however, all of the stress levels fell within the endurance limits and, therefore, our model predicts infinite plowshare lifetimes. For this analysis, we used a yield strength of 1,079 MPa for the plowshare and static safety factors, analyzed using the maximum stress, between 6.83 and 8.63 under each working speed.
목차
ABSTRACT
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
References
참고문헌 (18)
참고문헌 신청
김용주 / 2011 / 농업용 트랙터의 주요 농작업 소요동력 분석 / Journal of Biosystems Engineering 36(2):79~88
한정우 / 2017 / Experimental Method for Durability Evaluation of a Chisel Mounted on a Composite Working Implement / Journal of Biosystems Engineering 42(4):251~257
Kim, D. C. / 1998 / Development of a Load Spectrum of Tractor Transmission / Journal of the Korean Society for Agricultural Machinery 23(6):539~548
Lee, J. S. / 2014 / Analysis of Load Spectrum of 70kW-class Tractor for Plowing Operation / Journal of Agriculture & Life Sciences 45(1):18~22
Choi, C. H. / 2000 / Load Measurement of Tractor on Field Performance / Proceedings of the KSAM 2000 Summer Conference 5(2):29~34
한정우 / 2017 / Experimental Method for Durability Evaluation of a Chisel Mounted on a Composite Working Implement / Journal of Biosystems Engineering 42(4):251~257
Kim, D. C. / 1998 / Development of a Load Spectrum of Tractor Transmission / Journal of the Korean Society for Agricultural Machinery 23(6):539~548
Lee, J. S. / 2014 / Analysis of Load Spectrum of 70kW-class Tractor for Plowing Operation / Journal of Agriculture & Life Sciences 45(1):18~22
Choi, C. H. / 2000 / Load Measurement of Tractor on Field Performance / Proceedings of the KSAM 2000 Summer Conference 5(2):29~34
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UCI(KEPA) : I410-ECN-0101-2019-581-000684487