Frictional Tooth Contact Analysis along Line of Action of a Spur Gear Using Finite Element Method

Patil, Santosh; Karuppanan, Saravanan; Atanasovska, Ivana; Wahab, Azmi Abdul

doi:10.1016/j.mspro.2014.07.399

Cited by 22 publications

(12 citation statements)

References 6 publications

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“…Given F t(α>0) one can determine the torque M α c needed to move the chair up a ramp. Taking a total mass (chair + user) of m = 100 kg and a coefficient of rolling resistance ρ = 0.015 in accordance with the results reported in de Groot et al (2006) and Richter et al (2007), one has:…”

Section: Analysis Of the Kinematics Of The Proposed Propulsion Systemsupporting

confidence: 56%

“…We make the following simplifying assumptions in this work: the analysis is done in two dimensions (van der Woude et al, 1988); the speed of ascent (v slope = cte) (Arnet et al, 2013;Chow et al, 2009;Veeger et al, 1991;Van Der Woude et al, 2003); the inertia of the wheel (Richter et al, 2007;van der Woude et al, 1988) and the aerodynamic resistance (Van Der Woude et al, 2003 are neglected; and the forces the user applies to each wheel are symmetrical (Arnet et al, 2013). Then:…”

Section: Analysis Of the Kinematics Of The Proposed Propulsion Systemmentioning

confidence: 99%

“…Figure 8 shows a method for calculating the resistance of the mechanism. This is the method used in Hwang et al (2013), Li (2012), Moreira et al (2016) and Patil et al (2014) in which the resistance of the cog is calculated from the tangential force F t(α>0) caused by the torque produced at the centre of the gear's pitch radius.…”

Section: Force and Stress Analysismentioning

confidence: 99%

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A new manual wheelchair propulsion system with self-locking capability on ramps

et al. 2018

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Abstract. A wheelchair user faces many difficulties in their everyday attempts to use ramps, especially those of some length. The present work describes the design and build of a propulsion system for manual wheelchairs for use in ascending or descending long ramps. The design is characterized by a self-locking mechanism that activates automatically to brake the chair when the user stops pushing. The system consists of a planetary transmission with a self-locking capacity coupled to a push rim with which the user moves the system. Different transmission ratios are proposed, adapted to the slope and to the user's physical capacity (measured as the power the user can apply over ample time periods). The design is shown to be viable in terms of resistance, and approximate dimensions are established for the height and width of the propulsion system. Also, a prototype was built in order to test the self-locking system on ramps.

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Section: Analysis Of the Kinematics Of The Proposed Propulsion Systemsupporting

confidence: 56%

Section: Analysis Of the Kinematics Of The Proposed Propulsion Systemmentioning

confidence: 99%

Section: Force and Stress Analysismentioning

confidence: 99%

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A new manual wheelchair propulsion system with self-locking capability on ramps

et al. 2018

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“…Frictional gear contact stress evaluation has been the major challenge. Finite element (FE) technique has been utilized to solve this nonlinear frictional problem and a new idea of friction factor for gear contact stress evaluation has been proposed in recent literature [7].…”

Section: Reviewmentioning

confidence: 99%

A Short Review on Frictional Contact Stress Distribution in Involute Gears

Patil¹,

Karuppanan²,

Atanasovska³

2019

Tribol. Ind.

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In this paper, the gear contact evaluation models developed using various methods have been discussed. The new experimental and numerical methods have been presented. The research papers are classified into frictionless and frictional contact stress analysis and subdivided into experimental and finite element models. This paper will provide researchers with various information and huge literature data on the described subject. It serves as the rapid retrieval of data related to gear contact stress evaluation. Furthermore, a comprehensive discussion focusing on the customized experimental test rig (Gear Dynamic Stress Test Rig) has been done. Also, the finite element (FE) results showing the variation of contact stresses with and without friction, along the contact path has been shown. The FE results revealed that the contacting stresses between the gears increased significantly for different parallel axis gear, for a given coefficient of friction rise considered in the study.

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“…Patil et al [16] discovered that frictional variations affect the point of contact and cause deviations in maximum pressure values. Zheng Li and Ken Mao [17] investigated the effects of friction towards the gear tooth contact analysis and discovered that transmission error is an excitation mechanism which causes gear noise and vibration due to friction.…”

Section: Introductionmentioning

confidence: 99%

Frictional stress analysis of spur gear with misalignments

Eng¹,

Karuppanan²,

Patil³

2018

J. MECH. ENG. SCI.

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Misalignments in gears cause vibrations and contact nonlinearities, which in turn cause load distribution shift on the gear tooth. The load distribution shift of the gear pair results in increased contact and bending stresses with the maximum stresses leaning towards the edge of the face width. These stress changes cause failures and gear performance variations, such as pitting, scuffing, crack initiation and eventually tooth breakage. In this paper, the contact and bending stresses of a misaligned spur gear pair were evaluated with and without friction by employing corresponding analytical methods and finite element method (FEM). Friction coefficient values of 0.1 to 0.3 were used to evaluate the effects of friction on contact and bending stress distribution of a spur gear pair with axial and angular misalignments. The stress concentration was found to be higher at the contact point and at the tooth root of the gear with the augmentation of the misalignment distance and angle. The maximum contact and bending stresses increased by 67.5% and 18.9%, respectively, when axial misalignments were subjected. Similarly, the maximum contact and bending stresses increased by 27.0% and 62.4%, respectively, for angular misalignments. Furthermore, the contact and bending stresses increased proportionally with the increasing coefficient of friction. Finally, the relationships between the normalized stress and misalignments (both axial and angular) were established.

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Frictional Tooth Contact Analysis along Line of Action of a Spur Gear Using Finite Element Method

Cited by 22 publications

References 6 publications

A new manual wheelchair propulsion system with self-locking capability on ramps

A new manual wheelchair propulsion system with self-locking capability on ramps

A Short Review on Frictional Contact Stress Distribution in Involute Gears

Frictional stress analysis of spur gear with misalignments

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