FEM을 이용한 다목적 관리기 동력전달 시스템의 응력해석에 관한 연구
A Study on Stress Analysis of Transmission System of Multi-Purpose Cultivator using Finite Element Method
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초록
본 연구는 다목적 관리기의 동력전달 시스템이 가혹한 작동환경에서 겪는 응력상황에 대한 분석을 유한요소해석을 수행함으로써, 기계요소의 안전성을 평가하는 한편, 개선 방안을 도출하고자 진행되었다. 엔진으로부터 작업기에 이르는 과정에 존재하는 동력전달 시스템은 엔진의 출력이 과도하게 인가될 경우 매우 높은 수준의 응력을 나타낼 우려가 있으며 따라서 이와 같은 가혹한 조건을 고려하기 위하여동력전달 시스템의 출력축이 정지된 상황을 가정하여 시뮬레이션을 수행하였다. 볼클러치(Ball-clutch)와 PTO 조인트(Power take-off joint)에 대하여 응력해석을 수행한 결과 허용접촉응력 이상의 높은응력이 국부적으로 발생한다는 사실을 확인하였고, 이러한 문제를 해결하기 위하여 접촉부의 형상을 변경하여 추가적인 시뮬레이션을 수행하였다. 접촉부의 모서리에 일정 반경의 모깎기를 적용하거나 기계요소의 형상을 변화시켜 접촉면의 위치를 바꿈으로서 과도한 응력집중을 방지할 수 있음을 확인할 수있었다. 이를 바탕으로 보다 우수한 내구성 및 신뢰성을 지닌 다목적 관리기를 개발할 수 있을 것으로판단된다.
Abstract
This study was carried out to analyze stress distribution of mechanical components ofmulti-purpose cultivator under complicated operation conditions. The analysis was performedthrough finite element method and the alternatives to improve durability and reliability ofpowertrain was suggested. The simulation was conducted based on the consideration of harshcondition that output of the cultivator was constrained by various external conditions. In thiscase, engine power was estimated to be applied to the transmission and extremely high stresswas monitored as the result of the stress analysis on the ball-clutch and PTO joint. Modificationof surface geometries at the contact area was suggested and its effectiveness in reducing contactstress was clarified. It was believed that the result of this study could be utilized to developmulti-purpose cultivator which had improved durability and reliability.
참고문헌 (28)
- 최용진, "Multi-Stage Forging Process Design of Steering System Output Shaft for Reduction of Energy Consumption", International Journal of Precision Engineering and Manufacturing, 16(7), pp.1455~1460 (2015), 한국정밀공학회
- Deng X, "Research on the Design and Modification of Asymmetric Spur Gear", Math. Probl. Eng, 2015, pp.897257~ (2015)
- Figueiredo RB, "Using finite element modeling to examine the temperature distribution in quasi-constrained high-pressure torsion", Acta Mater, 60, pp.3190~3198 (2012)
- Gdoutos EE, "Fracture mechanics: An introduction", pp.57~78 (2013), Springer science & Business media
- Goldfarb V, "Theory and Practice of Gearing and Transmissions", pp.257~258 (2015), Springer
- Ibrahim RA, "Friction-induced vibration, chatter, squeal, and chaos-Part I : Mechanics of contact and friction", Appl. Mech. Rev, 47(7), pp.209~226 (1994)
- Johnson KL, "Contact mechanics", pp.84~106 (1994), Cambridge university press
- Jun BY, "Prediction of geometric dimensions for cold forgings using the finite element method", J. Mater. Process. Technol, 189(1-3), pp.459~465 (2007)
- Kim DE, "A novel approach to wear reduction of micro-components by synthesis of carbon nanotube-silver composite coating", CIRP Ann. Manuf. Techn, 60, pp.599~602 (2011)
- 김형규, "트라이볼로지 손상을 억제하기 위한 구조물 모서리부 설계: 제1부 - 설계공식 개발", 한국윤활학회지, 31(4), pp.163~169 (2015), 한국윤활학회[DOI]
- 김형규, "트라이볼로지 손상을 억제하기 위한 구조물 모서리부 설계: 제2부 - 설계인자 분석 및 예", 한국윤활학회지, 31(4), pp.170~176 (2015), 한국윤활학회[DOI]
- Kim JY, "Determination of tensile properties by instrumented indentation technique: Representative stress and strain approach", Surf. Coat. Technol, 201(7), pp.4278~4283 (2006)
- Kim SH, "Quantitative determination of contact depth during spherical indentation of metallic materials—A FEM study", Mater. Sci. Eng, 415(1-2), pp.59~65 (2006)
- 이경원, "FEM을 이용한 스퍼기어 응력 해석에 관한 연구", 한국정밀공학회지, 19(2) (2002), 한국정밀공학회
- Liu G, "Impact of tooth friction and its bending effect on gear dynamics", J. Sound Vibration, 320, pp.1039~1063 (2009)
- Liu Y, "Analysis of subsurface crack propagation under rolling contact loading in railroad wheels using FEM", Eng. Fract. Mech, 74(17), pp.2659~2674 (2007)
- Lovell M, "Analysis of contact between transversely isotropic coated surfaces : development of stress and displacement relationships using FEM", Wear, 214(2), pp.165~174 (1998)
- Matsuoka M, "Sugarcane cultivation and sugar industry in Japan", Sugar Tech, 8(10), pp.3~9 (2006)
- Minami I, "The Tribological Properties of Ionic Liquids Composed of Trifluorotris(pentafluoroethyl) Phosphate as a Hydrophobic Anion", Tribol. Lett, 30(3), pp.215~223 (2008)
- Patil SS, "Contact stress analysis of helical gear pairs, including frictional coefficients", Int. J. Mech. Sci, 85, pp.205~211 (2014)
- Pedersen NL, "Minimizing tooth bending stress in spur gears with simplified shapes of fillet and tool shape determination", Eng. Optimiz, 47(6), pp.805~824 (2015)
- Stachowiak GW, "Numerical characterization of wear particles morphology and angularity of particles and surfaces", Tribol. Int, 31(1-3), pp.139~157 (1998)
- Varenberg M, "Different aspects of the role of wear debris in fretting wear", Wear, 252(11-12), pp.902~910 (2002)
- Velex P, "Experimental and Numerical Investigations on the Influence of Tooth Friction in Spur and Helical Gear Dynamics", J. Mech. Design, 122(4), pp.515~522 (2000)
- Vijayarangan S, "Static contact stress analysis of a spur gear tooth using the finite element method, including frictional effects", Comput. Struct, 51(6), pp.765~770 (1994)
- Wei RP, "Fracture mechanics: Integration of mechanics, Materials Science and Chemistry", pp.50~71 (2010), Cambridge university. press
- Ye SY, "A computerized method for loaded tooth contact analysis of high-contactratio spur gears with or without flank modification considering tip corner contact and shaft misalignment", Mech. Mach. Theory, 97, pp.190~214 (2016)
- 윤병선, "농업관련산업의 세계화 전략과 그 영향 - 농약 및 종자산업을 중심으로 -", 산업경제연구, 17(5), pp.1637~1653 (2004), 한국산업경제학회