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Littérature scientifique sur le sujet « Tooth root optimization »

Auteur : Grafiati
Publié le 4 juin 2021
Mis à jour le 1 février 2022

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Articles de revues sur le sujet "Tooth root optimization"

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Uelpenich, Ray, et Peter Tenberge. « Fast tooth root load capacity optimization based on improved design of hob geometry ». MATEC Web of Conferences 287 (2019) : 01011. http://dx.doi.org/10.1051/matecconf/201928701011.

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The competitiveness of gearboxes is significantly influenced by their performance ability. Increasing the tooth root load capacity has always been in focus of current research because in case of a failure of the gearwheel due to a tooth root fracture, the complete gearbox fails. This paper presents a new calculation method that enables the optimization of hob geometries within a few minutes so that they lead to reduced stresses in the tooth root fillet of spur gears. This results in reductions of the maximum tooth root stress of 10% and more for most gearwheels. The manufacturing costs for the optimized hob are only influenced slightly. In order to increase the computational speed compared to purely FE-based optimization methods, the present paper shows a method in which the decisive part of the optimization process is based on an analytical equation which are derived by a small number of FE-calculations.
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Vaghela, Priyakant, et Jagdish Prajapati. « Optimization of Tooth Root Profile Using Bezier Curve with G2 Continuity to Reduce Bending Stress of Asymmetric Spur Gear Tooth ». MATEC Web of Conferences 237 (2018) : 03010. http://dx.doi.org/10.1051/matecconf/201823703010.

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This research describes simple and innovative approach to reduce bending stress at tooth root of asymmetric spur gear tooth which is desire for improve high load carrying capacity. In gear design at root of tooth circular-filleted is widely used. Blending of the involute profile of tooth and circular fillet creates discontinuity at root of tooth causes stress concentration occurs. In order to minimize stress concentration, geometric continuity of order 2 at the blending of gear tooth plays very important role. Bezier curve is used with geometric continuity of order 2 at tooth root of asymmetric spur gear to reduce bending stress.
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Kapelevich, A. L., et Y. V. Shekhtman. « Optimization of asymmetric tooth root generated with protuberance hob ». Forschung im Ingenieurwesen 83, no 3 (24 juillet 2019) : 627–34. http://dx.doi.org/10.1007/s10010-019-00357-2.

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Yang, Yu, Xing Guo, Shu Dong Yang et Tao Xu. « Strength Optimization Design of a Helical Hydraulic Rotary Actuator ». Advanced Materials Research 544 (juin 2012) : 139–44. http://dx.doi.org/10.4028/www.scientific.net/amr.544.139.

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A helical hydraulic rotary actuator for part-turn motion control is presented. Because of its compact structure and large output torque, strength study for the helical hydraulic rotary actuator becomes very necessary. Using AWE, influences of multi-start thread engagement length, thread start number, spline pressure angle and piston material on strength of the actuator’s key parts are studied in depth, so as to optimize the actuator’s strength and structure. The results show that the influences of nut width, thread start number and piston material on multi-start thread root strength of nut are notable, the influence of pressure angle on spline tooth root strength of output shaft is visible, and stress concentration on multi-start thread root and spline tooth root is very obvious.
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Seitz, K. F., J. Grabe et T. Köhne. « A three-dimensional topology optimization model for tooth-root morphology ». Computer Methods in Biomechanics and Biomedical Engineering 21, no 2 (25 janvier 2018) : 177–85. http://dx.doi.org/10.1080/10255842.2018.1431778.

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Landi, Luca, Alessandro Stecconi, Giulia Morettini et Filippo Cianetti. « Analytical procedure for the optimization of plastic gear tooth root ». Mechanism and Machine Theory 166 (décembre 2021) : 104496. http://dx.doi.org/10.1016/j.mechmachtheory.2021.104496.

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Zhang, Yu Bai, Hui Qun Yuan et Ming Xuan Liang. « Simulation Research on Tooth Root Dynamic Stress of Marine Helical Gear Meshing Impact ». Applied Mechanics and Materials 331 (juillet 2013) : 7–10. http://dx.doi.org/10.4028/www.scientific.net/amm.331.7.

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Finite element model of helical gear meshing of large burden marine is built based on explicit dynamics finite element method, dynamics stress variation of helical gear tooth is simulated under multiple working conditions, research is focused on the impact of changes in working conditions on the dynamic stress of the tooth root. The results show that helical gear pair speed and center distance error have great impact on dynamic stress of tooth root. The results provide reference for dynamic performance optimization of marine gears.
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Week, M., et O. Brömsen. « A computer system for tooth root optimization of case-hardened gearwheels ». CIRP Annals 51, no 1 (2002) : 135–38. http://dx.doi.org/10.1016/s0007-8506(07)61484-x.

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Sholahuddin, Umar, Agus Purwadi et Yanuarsyah Haroen. « Structural Optimizations of a 12/8 Switched Reluctance Motor using a Genetic Algorithm ». International Journal of Sustainable Transportation Technology 1, no 1 (30 avril 2018) : 30–34. http://dx.doi.org/10.31427/ijstt.2018.1.1.5.

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Structural design optimization of 12/8 switched reluctance motor using single objectives genetic algorithms is explored. The objective of this optimization is to maximize the output torque using four parameters, namely rotor width of tooth root, rotor width of tooth tip, half of stator tooth width, and stator outer diameter. The result is the optimized motor has higher average torque of 25% compared to the initial design. The evaluation of motor model is finite element method. The 12/8 switched reluctance motor will be applied in a mini electric vehicle.
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Wang, Chun Xiang, Fan Juan Meng et Jing Qiang Zhang. « Research on the 3D Modeling Method of Epicycloids’ Bevel Gear Based on Pro/E ». Applied Mechanics and Materials 120 (octobre 2011) : 15–19. http://dx.doi.org/10.4028/www.scientific.net/amm.120.15.

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In order to obtain 3D solid model of an Oerlikon system’s prolate epicycloidal bevel gear by full generating processing, the solid modeling method for the gear was studied in Pro/E. First, Drawing benchmark circles (base on the circle and reference circle as well as tip circle and root circle)and involute tooth profile of virtual equivalent gears of both large end and small end of the real gear, and then an intercepted segment of prolate epicycloid which has the same trend to the tooth and is controlled by prolate epicycloidal equations is projected to the surface of the gear’s root cone for the sake of getting tooth curve along axial direction. In the end, along the tooth curve and on the root cone conducting a variable cross section solid scanning to tooth shaped cross section, a complete gear tooth will be gained and at last model establishing will be finished. This method provided digital basis for optimization design, reverse design and rapid prototyping of this kind of gear, and so its design efficiency is improved.
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Thèses sur le sujet "Tooth root optimization"

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Schumann, Stefan. « Möglichkeiten und Grenzen asymmetrischer Kegelradverzahnungen ». Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-170928.

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Durch neue, hochflexible Fertigungsverfahren wie das Freiformfräsen eröffnet sich für Kegelradverzahnungen ein großes geometrisches Optimierungspotenzial. Diese Arbeit widmet sich daher der Ermittlung einer optimalen Makro-, Mikro- und Zahnfußgeometrie für bogenverzahnte Kegelräder. Neben dem Zahnprofil und der Zahnfußkurve wird besonderes Augenmerk auf die Ermittlung topologischer Flankenmodifikationen zur Maximierung der Tragfähigkeit gelegt. Gleichzeitig bietet der gezeigte Optimierungsalgorithmus die Möglichkeit zur Minimierung der Geräuschanregung, wodurch der bisher existierende Zielkonflikt zwischen diesen beiden Aspekten aufgehoben werden kann.
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Müller, Tim. « Development of asymmetric gears with Creo Simulate ». Technische Universität Chemnitz, 2018. https://monarch.qucosa.de/id/qucosa%3A21514.

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Grundgedanke: • Erhöhung der Tragfähigkeit der Verzahnung (Flanke, Fuss) durch ein asymmetrisches Bezugsprofil Umsetzung: • Aufbau eines parametrischen FE-Zahnradmodells für asymmetrische Verzahnungen in Creo Simulate • Automatisierte FE-Simulation einer Vielzahl an Lösungsvarianten mit Multiziel-Konstruktionsstudie • Auswertung der Ergebnisse mit Hilfe einer Nutzerwertanalyse • Zeichnungserstellung und Fertigungsbetreuung Potenziale: • Reduzierung der Verzahnungsbreite um ca. 10%
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Schumann, Stefan. « Möglichkeiten und Grenzen asymmetrischer Kegelradverzahnungen ». Doctoral thesis, 2014. https://tud.qucosa.de/id/qucosa%3A28750.

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Durch neue, hochflexible Fertigungsverfahren wie das Freiformfräsen eröffnet sich für Kegelradverzahnungen ein großes geometrisches Optimierungspotenzial. Diese Arbeit widmet sich daher der Ermittlung einer optimalen Makro-, Mikro- und Zahnfußgeometrie für bogenverzahnte Kegelräder. Neben dem Zahnprofil und der Zahnfußkurve wird besonderes Augenmerk auf die Ermittlung topologischer Flankenmodifikationen zur Maximierung der Tragfähigkeit gelegt. Gleichzeitig bietet der gezeigte Optimierungsalgorithmus die Möglichkeit zur Minimierung der Geräuschanregung, wodurch der bisher existierende Zielkonflikt zwischen diesen beiden Aspekten aufgehoben werden kann.
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Chapitres de livres sur le sujet "Tooth root optimization"

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Kapelevich, A. L., et Y. V. Shekhtman. « Optimization of asymmetric tooth root generated with protuberance hob ». Dans International Conference on Gears 2019, 403–14. VDI Verlag, 2019. http://dx.doi.org/10.51202/9783181023556-403.

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Yildirim, N., M. Yasar, E. Yildirim, F. Erdogan et B. Karatas. « Experimental verification of improvements in static and fatigue bending capacity of spur gear tooth via tooth root design optimization ». Dans International Conference on Gears 2019, 959–72. VDI Verlag, 2019. http://dx.doi.org/10.51202/9783181023556-959.

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Actes de conférences sur le sujet "Tooth root optimization"

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Chao, Chen-Xiang, Dieter Bestle et David Krüger. « Tooth Root Shape Optimization of Thin-Rimmed Planet Gears ». Dans ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97345.

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Abstract Planetary gearboxes in highly sophisticated applications such as turbofan engines are required to have a high power-to-weight ratio and excellent reliability. Hence, thin-rimmed gear units need to be designed as compact as possible which, however, is usually limited by the tooth root load capacity. In order to come up with the best design, a tooth root shape optimization process is developed for thin-rimmed planet gears.
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Zou, Ting, Mathew Shaker, Jorge Angeles et Alexei Morozov. « Optimization of Tooth Root Profile of Spur Gears for Maximum Load-Carrying Capacity ». Dans ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34568.

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Increasing the strength of the gear tooth is a recurrent demand from industry. The authors report a novel approach to the design of tooth-root profile of spur gears using cubic splines, with the aim of investigating the effect of tooth-root geometry on stress concentration in order to increase the gear tooth strength by optimizing the root profile. An iterative co-simulation procedure, consisting of tooth-root profile shape synthesis via nonlinear programming and finite element analysis software tools is conducted, for the purpose of forming the tooth-root geometry design with the minimum stress concentration. The proposed design was verified to be capable of reducing the stress concentration by 21% over its conventional circular-filleted counterpart. Hence, the results showcase an innovative and sound methodology for the design of the tooth-root profile to increase gear load-carrying capacity.
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Fan, Qi. « Optimization of Face Cone Element for Spiral Bevel and Hypoid Gears ». Dans ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47211.

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In the blank design of spiral bevel and hypoid gears, the face cone is defined as an imaginary cone tangent to the tops of the teeth. Traditionally, the face cone element or generatrix is a straight line. On the other hand, the tooth root lines which are traced by the blade tips are normally not straight lines. As a result, the tooth top geometry generally does not fit the mating member’s real root shape, providing an uneven tooth root-tip clearance; additionally, in some cases root-tip interference between the tooth tip and the root tooth surfaces of the mating gear members may be observed. To address this issue, this paper describes a method of determining an optimized face cone element for spiral bevel and hypoid gears. The method is based on the incorporation of calculation of tooth surface and root geometries, the conjugate relationship of the mating gear members, the ease-off topography, and the tooth contact analysis. The resulting face cone element may not be a straight line but generally an optimized curve that, in addition to avoidance of the interference, offers maximized contact ratio and even tooth root-tip clearance. Manufacturing of bevel gear blanks with a curved face cone element can be implemented by using computer numerically controlled (CNC) machines.
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Dong, Janet, Shane Y. Hong et Gunnar Hasselgren. « Non Destructive Diagnosis for Minimum Invasive Access Preparation in Endodontic Treatment ». Dans ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33484.

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Root canal treatment of infected root canals represents a large percentage of business in general dental practice. It is an expensive process and often prone to failure. During root canal treatment, destructive access preparation by removing parts of tooth crown and dentin is usually needed even before a clinician’s inspection and diagnosis. This paper presents a non-destructive method for accessing the internal tooth geometry by building a 3-D tooth model from 2-D radiograph. The geometry of root canals is then formulated into a mathematical model. Based on this mathematical model, the treatment procedures utilizing the dental tools/instruments are planned by a computer aided prescription system, which yields the tool selection and tool path for the root canal preparation by an intelligent micro drilling machine with on-line monitoring. To minimize the removal of healthy tooth crown and dentin, thus protecting the strength of the patient’s infected tooth, an optimization algorithm is utilized for planning the access preparation in the root canal treatment. Although an opening of a tooth crown is still needed so that dental instruments can reach the root canal, the non-destructive 3-D modeling and the optimization of the access preparation in the new approach makes the root canal treatment minimally invasive compared to present techniques.
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Sun, Shouli, Shilong Wang, Yawen Wang, Teik C. Lim, Baocang Zhou et Zongyan Hu. « Optimization of Hypoid Gear Design and Tooth Contact Analysis ». Dans ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-68407.

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Hypoid gears are effectively used in cross axis power transmission systems. Design of hypoid gear parameters is complex and dependent on designers’ experiences. In this paper, an easy approach to design the parameters of hypoid gear to obtain the minimum of maximum principle normal contact stress and peak to peak transmission error is presented. An improved Particle Swarm Optimization (PSO) and Back Propagation (BP) algorithm is proposed to predict the stress and the transmission error if certain design parameters are given. The predictive accuracy is evaluated by Root Mean Square Error (RMSE) equation. The results show that the predictive accuracy is in reasonable agreement with the values calculated by the software [1]. Based on the prediction model, the optimization model for the design parameters of hypoid gear is established. This paper proposes a method to design a set of hypoid gears with minimum of maximum principle normal stress and peak to peak transmission error.
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Qiu, Kevin, et Reza Samadi. « Numerical Simulation for Optimizing Tooth Profile Using Bezier Curve ». Dans ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97009.

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Abstract The research hereby introduces a novel approach to reduce tooth bending stress using a parametric numeric simulation. This Finite Element Method (FEM) is used to determine optimal design variables for an asymmetric root profile of a helical gear defined by a rational cubic Bezier curve. The gear is first modelled using a machine design software and later implemented into a 3D computer aided design (CAD) package to modify the root spline geometry using a script. A nonlinear relationship exists between the design variables and tooth bending stress. Additionally, certain trends exist between the design variables to exhibit a more optimal root profile. The simulation results show that the proposed method is feasible as the general optimization process results in significant bending stress reduction. The numerical simulation demonstrates that bending stress can be reduced by as much as 10.75% by the proposed approach.
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Arikan, M. A. Sahir. « Performance Rating and Optimization of Spur Gear Drives With Small Number of Teeth ». Dans ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/ptg-14361.

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Abstract Performance rating of spur gear drives with small number of teeth is made and variations of contact ratio, circular tooth thicknesses at pinion and gear tooth tips, lengths of the pinion addendum and dedendum portions of the line of action, AGMA geometry factor J for the pinion and the gear and their ratio, and AGMA geometry factor I with addendum modification coefficient are determined. Thus, it is made possible to design gear drives with properties such as, maximum possible contact ratio, maximum length of the pinion addendum portion of the line of action, maximum length of the pinion dedendum portion of the line of action, equal AGMA geometry factors J for the pinion and the gear (i.e. equal pinion and gear tooth root stresses), and maximum AGMA geometry factor I (i.e. minimum tooth contact stress). Rack cutter tip fillet radius and rack cutter geometry are considered in the analysis, which are the basic factors that determine the gear tooth fillet profile.
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Guo, Jianhua, Hongyuan Jiang, Gang Han et Hui Yan. « A New Design of Tooth Profiles Increases Synchronous Belt’s Fatigue Life ». Dans ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66301.

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Synchronous belt and its driving pulley have non-conjugate tooth profiles. Because of non-conjugate motion and polygon effect, interference occurs during incomplete meshing, resulting in excessive wear and tear at tooth-root, which are the main forms of failure of synchronous belts. Tooth cracking also results from uneven stress distribution and/or increased maximal stress. In addition to discovering better materials to increase the strength of the belt’s teeth, optimization of the geometry of tooth profiles of belt and pulley to decrease the maximum tooth-root stress and to reduce interference during meshing is critical in improving the carrying capacity and increasing the belt’s life span. In the present study we proposed a new design of synchronous belt’s and pulley’s tooth profiles, modifying several key geometric parameters commonly used in synchronous belts’ designs. Applying the conformal mapping function and the theory of plane elasticity we systemically investigated the distribution of stress and distortion at the belt’s and pulley’s teeth of varying geometric parameters and analyzed the interference during meshing using an approach to investigating tooth profiles of non-constant pitch diameter. Finite Element Analysis showed that with the same load the maximum principal stress values of belt teeth in complete meshing in our design (STSB) were 54.4% and 67.8% of that of HTD (by Uniroyal) and STPD (by Good Year) belts with an 8 mm pitch commonly used in automobiles, respectively. The uneven distribution of stress along the edge of tooth profile was reduced, and the interference during meshing minimized with our design. We then experimentally tested belts made of the same materials with the three designs manufactured by the same factory. The belts were tested in the enclosed type of testing machine for synchronous belt’s fatigue-life, power = 6.5 kW and speed = 1500 r/min with test belt tension at 400 N. The fatigue lives of the belts (n = 5 each group) were 988 ± 36, 439 ± 21 and 665 ± 22 hours (mean ± SD) for STSB, HTD and STPD belts (p<0.0001), respectively, demonstrating the superiority of our design. We anticipate that the new design will have wide applications not limited to the automobile industry.
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Ma, Xin, Zhongpei Ning, Honggang Chen et Jinyang Zheng. « Modeling and Optimization of Ultra High Pressure Vessel With Self-Protective Flat Steel Ribbons Wound and Tooth-Locked Quick-Actuating End Closure ». Dans ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61700.

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Ultra-High Pressure Vessel (UHPV) with self-protective Flat Steel Ribbons (FSR) wound and Tooth-Locked Quick-Actuating (TLQA) end closure is a new type of vessel developed in recent years. When the structural parameters of its TLQA and Buttress Thread (BT) end closure are determined using the ordinary engineering design method, Design by Analysis (DBA) shows that the requirement on fatigue life of this unique UHPV could hardly be satisfied. To solve the above problem, an integrated FE modeling method has been proposed in this paper. To investigate the fatigue life of TLQA and BT end closures of a full-scale unique UHPV, a three-dimensional (3-D) Finite Element (FE) solid model and a two-dimensional (2-D) FE axisymmetric model are built in FE software ANSYS, respectively., Nonlinear FE analysis and orthogonal testing are both conducted to obtain the optimum structure strength, in which the peak stress in the TLQA or BT end closure of the unique UHPV is taken as an optimal target. The important parameters, such as root structure of teeth, contact pressure between the pre-stressed collar and the cylinder end, the knuckle radius, the buttress thread profile and the local structure of the cylinder, are optimized. As a result, both the stress distribution at the root of teeth and the axial load carried by each thread are improved. Therefore, the load-carrying capacity of the end closure has been reinforced and the fatigue life of unique UHPV has been extended.
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Savignano, Roberto, Sandro Barone, Alessandro Paoli et Armando V. Razionale. « FEM Analysis of Bone-Ligaments-Tooth Models for Biomechanical Simulation of Individual Orthodontic Devices ». Dans ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34912.

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In the last decades, research in the orthodontic field has focused on the development of more comfortable and aesthetic appliances such as thermoformed aligners. Aligners have been used in orthodontics since the mid 20-century. Nonetheless, there is still not enough knowledge about how they interact with teeth. This paper is focused on the development of a Finite Element Method (FEM) model to be used in the optimization process of geometrical attributes of removable aligners. The presented method integrates Cone Beam Computed Tomography (CBCT) data and optical data in order to obtain a customized model of the dental structures, which include both crown and root shapes. The digital simulation has been focused on analyzing the behavior of three upper frontal teeth. Moreover, the analyses have been carried out by using different aligners’ thicknesses with the support of composite structures polymerized on teeth surfaces while simulating a 2 degrees rotation of an upper central incisor.
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