Thermo-mechanical modeling of polymer spur gears with experimental validation using high-speed infrared thermography

Černe, Borut; Petkovšek, Martin; Duhovnik, Jože; Tavčar, Jože

doi:10.1016/j.mechmachtheory.2019.103734

Cited by 59 publications

(27 citation statements)

References 22 publications

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“…Some of the main benefits of polymer gears are high size-weight ratio, low coefficient of friction, self-lubrication, high resistance against impact loading, ability to absorb and damp vibration, reduced noise, ability to be used in food preparation areas, etc. [ 7 , 8 , 9 , 10 ]. However, polymer gears also have some disadvantages, such as less load carrying capacity and lower operating temperatures if compared to the metal gears, difficulties in achieving high tolerances (especially in the case of moulded gears), relatively high dimensional variations due to temperature and humidity conditions, etc.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Wear Behaviour of Coated Polymer Gears

et al. 2021

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A comprehensive experimental investigation of the wear behaviour of coated spur polymer gears made of POM is performed in this study. The three physical vapour deposition (PVD) coatings investigated were aluminium (Al), chromium (Cr), and chromium nitrite (CrN). Al was deposited in three process steps: By plasma activation, metallisation of Al by the magnetron sputtering process, and by plasma polymerisation. Cr deposition was performed in only one step, namely, the metallization of Cr by the magnetron sputtering process. The deposition of CrN was carried out in two steps: the first involved the metallization of Cr by the magnetron sputtering process while the second step, vapour deposition, involved the reactive metallisation of Cr with nitrogen, also by the magnetron sputtering process. The gears were tested on an in-house developed testing rig for different torques (16, 20, 24 and 30 Nm) and rotational speed of 1000 rpm. The duration of the experiments was set to 13 h, when the tooth thickness, and, consequently, the wear of the tooth flank was recorded. The experimental results showed that the influence of metallisation with aluminium, chromium, and chromium nitrite surface coatings on the wear behaviour of the analysed polymer gear is not significant. This is probably due to the fact that the analysed coatings were, in all cases, very thin (less than 500 nm), and therefore did not influence the wear resistance significantly. In that respect, an additional testing using thicker coatings should be applied in the further research work.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Wear Behaviour of Coated Polymer Gears

et al. 2021

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“…In our previous work, a Thermosensorik CMT 384SM high-speed thermal imaging camera was used, which provided a frame rate of approximately 1910 fps and an integration time of 0.1 ms at a low 64 Â 64 px resolution [17,23]. While this was not enough to analyse the thermal response of a gear tooth pair throughout a gear meshing cycle, the camera yielded clear single-frame tooth temperature measurements during meshing, which sufficed to evaluate the local temperature gradient and the long-term tooth-root nominal temperature rise.…”

Section: Enhanced Measurement Methodsmentioning

confidence: 99%

“…The entire numerical analysis is built on a set of assumptions thoroughly verified in our previous studies [20,17,23,44]:…”

Section: Numerical Verification Analysesmentioning

confidence: 99%

“…All mentioned failure modes are typically identified by employing lifetime tests on specially designed test rigs and by observing the condition of the polymer gear after failure or after a chosen number of running cycles. There exists a variety of different types of test rigs, but in general most of them employ either the so-called back-to-back method (see, e.g., Mao et al [13]), a motor/brake setup (Pogac ˇnik et al [7], Cathelin et al [14], Letzelter et al [15]) or a twin-motor set-up (Lu et al [16], C ˇerne et al [17], Zorko et al [18]). Typically, tests are performed at a controlled constant torque and running speed, although in some cases it is advantageous to perform tests with variable loads (Pogac ˇnik et al [7]).…”

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confidence: 99%

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High-Speed Camera Based Optical Measurement Methods for In-Mesh Tooth Deflection Analysis of Thermoplastic Spur Gears

Černe¹,

Petkovšek

2022

SSRN Journal

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“…Since Wilcox [1] started using it in 1973 to determine the stresses in gear teeth under load, the finite element method has become an essential technology in the research and development of gear transmissions. In the last years, this analysis technique has been used for a wide range of applications, including the determination of the contact and bending stresses of the gears under load [2,3,4,5] and the prediction of the bulk and flash temperatures of the gears in operating conditions [6,7,8].…”

Section: Introductionmentioning

confidence: 99%

A simple procedure for generating locally refined 2D quadrilateral finite element meshes of gears

Roda-Casanova

Sanchez-Marin

2021

Mechanism and Machine Theory

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This article describes a new procedure for automated generation of two-dimensional locally refined quadrilateral meshes of gear drives. In this new procedure, a base mesh is generated using a multiblock meshing procedure. Then, selected elements of the base mesh are subdivided to obtain a refined mesh in certain parts of the gear teeth. The proposed procedure is completed with a mesh quality enhancement technique, which is based on an optimization-based smoothing. It also includes strategies that allow to automatically identify and refine those areas of the gear that are typically subjected to elevated stress gradients. The performance of the proposed procedure is illustrated with numerical examples, and it is compared to other existing meshing procedures, both in terms of mesh distortion and accuracy of the results.

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Thermo-mechanical modeling of polymer spur gears with experimental validation using high-speed infrared thermography

Cited by 59 publications

References 22 publications

Experimental Investigation of the Wear Behaviour of Coated Polymer Gears

Experimental Investigation of the Wear Behaviour of Coated Polymer Gears

High-Speed Camera Based Optical Measurement Methods for In-Mesh Tooth Deflection Analysis of Thermoplastic Spur Gears

A simple procedure for generating locally refined 2D quadrilateral finite element meshes of gears

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