Fatigue properties of polypropylene involute rack gear reinforced with metallic springs

Mendi, Faruk; Can, Hilal; Külekçi, Mustafa Kemal

doi:10.1016/j.matdes.2004.11.001

Cited by 12 publications

(9 citation statements)

References 9 publications

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“…They compared the results with a number of experiments for model validation purposes. Mendi et al manufacture a gear made from polypropylene, reinforced with three different metallic springs, and they concluded that the increase in the diameter of the reinforcement spring will increase the service life of the gear 30 times more than gears without metallic springs [16]. Aslantas and Tas carried out a series of experimental and numerical analysis on a spur gear made from austempered ductile iron to predict the pitting occur of the gear teeth [17].…”

Section: Numerical Proceduresmentioning

confidence: 99%

Dynamic Analysis of a Straight Bevel Gear Composite Structure

Al-Qrimli¹,

Almurib

Kumar

et al. 2014

J Material Sci Eng

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In this paper, orthotropic materials are selected to be used as a straight bevel gear. These materials have the advantage of being light, are durable in high speeds, require the minimum need for oil, high strengths, and extra loading capacities. Due to these properties, it is highly preferable comparing to conventional materials. This work demonstrates a standard form of the straight bevel gear, to focus on the study of the behaviour of material. Based on the complex proportional assessment method, we selected the woven roving glass fibre as an optimum material to be used in the straight bevel gear model. From the results, it was determined that the composite gear is better in terms of specific energy absorption and dynamic behaviour compared to steel gears. From the results, the jute-epoxy shows a very low value of stiffness and it can be concluded that the natural fibre is not suitable to be used as a material for a straight bevel gear.

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Section: Numerical Proceduresmentioning

confidence: 99%

Dynamic Analysis of a Straight Bevel Gear Composite Structure

Al-Qrimli¹,

Almurib

Kumar

et al. 2014

J Material Sci Eng

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“…Several other researchers have proposed and developed polymeric composite gears as alternatives to metallic gears [14][15][16][17][18]. Mendi et al [15] demonstrated that due to reinforcement, and residual compression stress in the tooth profile is more effective in increasing fatigue strength.…”

Section: Introductionmentioning

confidence: 99%

“…Mendi et al [15] demonstrated that due to reinforcement, and residual compression stress in the tooth profile is more effective in increasing fatigue strength. Endo et al [19] developed micro gears of carbon nanotubes as a filler into Nylon polymer and investigated its workability based on its applications.…”

Section: Introductionmentioning

confidence: 99%

Development and fabrication of cement reinforced polypropylene composite material spur gear

Sardar

Bandopadhya

2014

Journal of Polymer Engineering

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A new type of polymeric composite material spur gear was developed and fabricated using low cost Portland pozzolana cement (PPC) particles as filler into the polypropylene (PP) matrix. PP granules were mixed with PPC particles and an injection-molding process was followed to manufacture the thermoplastic composite gear. Several experiments were conducted with different percentages of PPC particles with the PP to optimize the gear material (cement filled poly-propylene composite) for fabrication. Tensile tests were conducted and the morphological studies of the fractured surface of the gear materials were investigated using scanning electron microscopy (SEM) and field emission SEM (FE-SEM). Dynamic mechanical analysis (DMA) was carried out and viscoelastic properties of the gear materials were studied with varying temperature. Further, extensive experimental studies were carried out to evaluate the performance of the gear tooth under loading conditions. The experimental results validate the suitability of the proposed non-metallic spur gear for low cost industrial applications.

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“…Hirogaki et al [10] used cotton fiber plain woven filled phenolics resin laminate as the gear material to study the tooth root stress resulting from bending movement under running conditions; the results revealed that the strength of a tooth with a filled fiber angle of 45 ∘ is at the lowest when the load is applied to the tooth tip. In addition, Mendi et al [11] found that reinforcing the polypropylene gear tooth with metallic wires, subsequently generating a residual compression stress in the structure of the gear tooth, increases the number of cycles of fatigue failure and enhances fatigue strength.…”

Section: Introductionmentioning

confidence: 99%

Optimized Injection Molding of Unfilled and Glass Filled PA6 Gears

Mehat

Kamaruddin

Othman

2014

International Journal of Manufacturing Engineering

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Shrinkage behavior is a crucial problem in manufacturing plastic molded gear. This is because it negatively affects the dimensional stability and accuracy of the involute profile, as well as the concentricity, roundness, tooth spacing uniformity, and size of the gear. By integrating the Taguchi robust design, Grey relational analysis, and principal component analysis, we investigated the dimensional stability related to the shrinkage of tooth thickness, addendum circle, and dedendum circle of molded gear via the optimization of processing parameters and glass fiber reinforcement. The results revealed that the optimal combination of the processing parameters of the molded gear to achieve minimum shrinkage is melt temperature of 260°C, packing pressure of 60%, packing time of 5 s, and cooling time of 30 s. The melt temperature showed the highest comparability sequence among the four key process parameters examined, followed by packing pressure, cooling time, and packing time. Meanwhile, the presence of glass fibers induced higher deviations of tooth thickness, addendum circle, and dedendum circle than those of the unfilled polyamide 6 gears.

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Fatigue properties of polypropylene involute rack gear reinforced with metallic springs

Cited by 12 publications

References 9 publications

Dynamic Analysis of a Straight Bevel Gear Composite Structure

Dynamic Analysis of a Straight Bevel Gear Composite Structure

Development and fabrication of cement reinforced polypropylene composite material spur gear

Optimized Injection Molding of Unfilled and Glass Filled PA6 Gears

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