Analysis of Oil Injection Cooling Characteristics of High Pitch Line Velocity Gear Pairs by Huang Bo, Zhang Hong, Ding Yiqun, Zhang Yuzhe, Hou Xiangying

“…Based on the Hertz contact theory and gear meshing characteristics, the average contact stress, relative sliding velocity, and friction coefficient of the tooth surface were solved. Based on the heat generation theory, the average heat flux density of the tooth surface at the high pitch line velocity was obtained. …”
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Design and Analysis of Asymmetric Involute Gear by Li Jianguo, Zhang Haiwei, Chen Zhenguo

“…The asymmetric involute gear tooth is designed,a collaborative coordinate of rack cutter,gear blanks and frame is built,the end face of rack cutter is designed,the tooth profile equation is determined,the tooth profile is simulated.The stress of single contact point to active small gear is analyzed,four force pressure angle combination are calculated using the formula method on 20° /20°,25° /20°,30° /20° and 35° /20°,the result is verified by using the finite element method,the comparative analysis results show that work with large pressure angle tooth surface can effectively improve the contact strength and bending strength of the gear.…”
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Load Contact Analysis and Strength Calculation of Spur Gear by Wang Yunzhi

“…Through tooth contact analysis（ TCA） and loaded tooth contact analysis（ LTCA）,the meshing process of spur gear pair is simulated. …”
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INFLUENCE OF ACTIVE MODIFICATION PARAMETERS ON BEARING CHARACTERISTICS OF OPPOSITE GEAR PAIRS (MT) by HOU YanYan, CHANG Qing, HU XiWen, PENG XianLong

“…In order to study the influence of active gear design on the bearing characteristics of tooth surface, the relationship between active modification parameters of the face gear and bearing characteristics of tooth surface is studied. …”
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Finite Element Analysis and Experimental Research of Gear Broken Teeth Fault of Engine by Jiang Zhinong, Jiang Bing, Zhang Yunxin, Che Yiquan, Zhang Feng, Zhang Jinjie

“…A finite element analysis of gear broken tooth fault of diesel engine based on the ANSYS Workbench is presented. …”
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Simulation Analysis of Face Gear Roll Forming by Guang Zhang, Fengshou Zhang, Yuanyuan Jin, Li Li

“…Based on the roll deformation theory，a roll model through Deform-3D finite element simulation software is established，the roll forming process of the face gear is analyzed and the metal flow conditions of the active and passive faces of the face gear tooth profile is analyzed according to the finite element simulation results； the influence trend of process parameters on the maximum load of the rolling wheel and the distribution law of equivalent strain and equivalent residual stress on the tooth profile are analyzed. …”
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Sharp Curvature of Premolar Resulting in External Apical Root Resorption of the Neighbouring Molar by Özgür İlke Atasoy Ulusoy

“…This case report describes an external apical root resorption resulted from the unusual root morphology of the neighbouring tooth. A 28-year-old female was referred to the department of endodontics with a complaint of intense pain in her maxillary second premolar tooth. …”
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Study on the Effect of Wind Turbine Gear Fault on the Transmission System by Feng Baohua, Xu Yuxiu

“…Combining experimental signal and analog signal on ADAMS,the effect of the fault which based on a single failure with gear tooth broken of fixed axis and coupling faults with crack tooth on fixed axis gear- planetary gear tooth broken on different points of transmission system is studied. …”
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Minimally Invasive Approach for Improving Anterior Dental Aesthetics: Case Report with 1-Year Follow-Up by H. Sevilay Bahadır, Gökhan Karadağ, Yusuf Bayraktar

“…An external discoloration was also identified in the maxillary left canine tooth. Moreover, the right canine tooth was identified as a Turner’s tooth according to the patient’s anamnesis. …”
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Calculation and Simulation of Non-circular Planetary Gear Water Motor Machining Parameter based Multiple Objective Optimization by Liu Zhiping, Su Jianxin, Deng Xiaozhong, Xu Zengjun

“…Aiming at the development of the water motor of petrochemical decoking transmission,the method of pitch curve calculation and tooth profile machining of non- circular planetary gear with tooth surface modification is studied. …”
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The Prevalence of Premature Loss of Primary Molars Among Children Who Attended College of Dentistry/Hillah City, Iraq by Sarah Y. Al Khafaji, Zahraa Mohamed Hussain Wais, Omaima Lateef Salman

“…Background: Early tooth loss can compromise the integrity of the arch length required for subsequent permanent teeth, causing crowding, rotation, and impaction of the permanent teeth. …”
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Evaluation of Caries-Free Restorations Bonded with Various Adhesive Systems: In Vitro Study by Morakot Piemjai, Pareewan Chantarawej, Nobuo Nakabayashi

“…Secondary caries originate from a leakage pathway where oral acids can penetrate faster and demineralize the tooth substrate deeper which can be visualized by dye penetration. …”
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Simulation and Experimental Verification of Barrel Finishing of Spiral Bevel Gears Based on the DEM by Yang Shufeng, Gao Yang, Wang Feng, Li Zhisheng, Yu Wentao, Xu Wenbo

“…The tooth surface of spiral bevel gears is a spatial curved surface, and the change of tooth surface roughness can have a significant impact on its meshing performance, directly affecting the vibration, bearing and other performance of the system. …”
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Analysis of the Modification Sensitivity of Herringbone Gear by Yong Zhao, Yajun Huang, Bin Yan, Yong Guo, Yuanyuan Zhang, Wei Cao

“…The results show that the load transmission error amplitude is sensitive to the tooth profile modification parameters， but not to the drum shape modification parameters； after the optimal modification of the tooth profile， the bearing transmission error is not sensitive to the center distance installation error， but the drum shape modification is vice versa； the sensitivity of load-bearing transmission error amplitude to topological modification parameters is between tooth profile and drum shape modification. …”
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Dynamic Contact Analysis of Torus-involute Gear by Fang Meijuan, Liu Lei

“…Taking the torus-involute gear as study object,according to the theory of gear meshing and the gear hobbing process,the tooth surface equations of torus-involute gears with convex and concave teeth are derived by using the tooth surface equation of counterpart rack.According to the mathematical conditions of neither undercutting nor tooth pointing,based on MATLAB,the Graphical User Interface which contains geometric parameter designs of torus-involute gear is developed.In the light of the tooth surface equations of torus-involute gear,the three-dimensional coordinates of torus-involute gear are calculated which can be used to develop the3-D solid models.The Hypermesh is used to mesh the 3-D models of torus-involute gear.Based on the nonlinear contact algorithm,the finite element models of convex and concave torus-involute gears meshing are established which can be used to implement the dynamic contact analysis in ABAQUS.The results reveal that the width of torus-involute gears is limited by gear undercutting or tooth pointing and the maximum contact stress will be steady after hobbing for a while.The contact stress is small when just a pair of gear teeth are meshing,while the contact stress is large when two pairs of gear teeth are meshing.…”
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A Forming Method and Theoretical Verification of Curvilinear Cylindrical Gears for Adjustable Contact Area by Xuegang Zhang, Yongchun Xie, Pengfei Wang

“…To improve the contact performance of curvilinear cylindrical gears，a forming method for adjusting the contact area of tooth surfaces is proposed. Firstly，a basic scheme is established for adjusting the contact area of tooth surfaces，which means the large gear is formed by a double-edged face-milling cutter，and the concave and convex surfaces of the pinion are formed by the outer-edge and inner-edge face-milling cutters，respectively. …”
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Analysis of Relevant Influence Factor of the High-speed Meshing Gear Body Temperature by Wang Chunhua, Han Chong, An Da

“…The temperature on tooth surface uniformly increase when tooth width increases,the change of modulus cause the changes of multiple factors and temperature on tooth surface decrease and then increase as modulus decreases. …”
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Effect of Geometric Transmission Error on Load and Vibration Characteristic of Spiral Bevel Gear by Bohui Yang, Xuemei Cao, Dingjun She, Haoyang Tian

“…The tooth surface grid node coordinates are accurately calculated by the tooth surface equation. …”
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SIMPLIFIED CALCULATION OF MESHING STRENGTH OF FACE GEAR PAIR (MT) by HE Fei, QIAN WeiXiang, FU XueZhong, PENG XianLong

“…By referring to the existing strength calculation formula of the standard spur gear, the analytical calculation models of contact stress and bending stress of full tooth height of face gear were established. The curvature of tooth surface was solved by the basic parameters of the gear, and the contact stress of tooth surface was solved by the Hertz contact theory. …”
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Research on Modification Method of Internal Gearing Power Honing based on Flexible Dressing of Honing Wheel by Lian Xia, Qing Wang, Jiang Han, Xiaoqing Tian

“…Finally，the final tooth surface of the workpiece is calculated according to the optimized motion parameters of honing，and the tooth contact is analyzed. …”
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