Failure and wear analysis of poly(butylene terephthalate) nanocomposite spur gears

Soudmand, B.H.; Shelesh‐Nezhad, Karim

doi:10.1016/j.triboint.2020.106439

Cited by 22 publications

(11 citation statements)

References 55 publications

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“…The higher

X_{c}

results from the increase in the nucleation activity of nanoparticles in the matrix, improving the stiffness, surface hardness, and wear performance. [ 83 ] The incorporation of NCC also increased

X_{c}

compared to POM; however, the values of

X_{c}

for nanocomposites were lower than that of POM/CB. The lower nucleation with CaCO 3 inclusion can be ascribed to the higher chain immobilization in the presence of CaCO 3 due to proper bonding, which suppressed nucleation activity and lowered

X_{c}

.…”

Section: Resultsmentioning

confidence: 99%

Synergetic impacts of two rigid nano‐scale inclusions on the mechanical and thermal performance of POM/carbon black/CaCO₃ ternary nanocomposite systems

2022

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In the present contribution, the mechanical and thermal characteristics of polyoxymethylene (POM)/carbon black (CB)/CaCO3 (NCC) ternary nanocomposites were assessed through mechanical tests and morphological observations. Scanning electron microscopy (SEM) micrographs indicated the uniform distribution of nanoparticles in the matrix. Dynamic mechanical thermal analysis (DMTA) revealed a promotion of elastic response and lower energy dissipation in ternary nanocomposites against neat POM and single‐filled POM/CB samples. Tensile strength results showed the increase of tensile modulus and strength by 27% and 8% for the ternary nanocomposite compared to binary POM/CB. Flexural and impact properties were also enhanced with the inclusion of NCC as a second rigid phase. SEM observations of impact‐fractured surfaces at high magnifications revealed full and partial debonding of nanoparticles from the matrix and consequent cavitation in the matrix, which mainly contributed to impact toughening. Hashin‐Shtrikman model was employed to analyze its efficiency to predict Young's modulus of ternary nanocomposite systems.

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“…The higher

X_{c}

results from the increase in the nucleation activity of nanoparticles in the matrix, improving the stiffness, surface hardness, and wear performance. [ 83 ] The incorporation of NCC also increased

X_{c}

compared to POM; however, the values of

X_{c}

X_{c}

.…”

Section: Resultsmentioning

confidence: 99%

Synergetic impacts of two rigid nano‐scale inclusions on the mechanical and thermal performance of POM/carbon black/CaCO₃ ternary nanocomposite systems

2022

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“…As shown in previous works [17,18], the method for analyzing gear wear is relatively simple. At the same time, complex and changeable real-world environmental factors have not yet been simulated.…”

Section: Introductionmentioning

confidence: 99%

Study on Wear Mechanism of Helical Gear by Three-Body Abrasive Based on Impact Load

Wang

Guo

et al. 2022

Materials

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This study aimed to explore the wear characteristics and evolution mechanisms of large-scale wind power gears under the impact load of particles of the three-body abrasive Al2O3 (0.2 mg/mL) from four aspects: oil analysis, vibration analysis, amount of gear wear, and tooth-surface-wear profile analysis. A magnetic powder brake was used to simulate the actual working conditions. Combined with the abrasive particle monitoring and the morphology analysis of the tooth-surface-wear scar, by setting quantitative hard particles in the lubricating oil, the gears are mainly operated in the abrasive wear state, and wear monitoring and wear degree analysis are carried out for the whole life cycle of the gears. Oil samples were observed and qualitatively analyzed using a particle counter, a single ferrograph, a metallographic microscope, and a scanning electron microscope. The experiments demonstrate that the initial hard particles have a greater impact in the early wear stage of the gears (<20 h), and abrasive particle concentration increases by 30%. This means that Al2O3 particles accelerate the gear wear during the running-in period. The loading method of the impact load on the oblique gear exacerbates the abrasion particle wear and expands the stress concentration, which reduces the surface of large milling particles on the surface, and reduces the width of the tooth (the part above the pitch line is severely worn), which causes the gear to break into failure. The research provides help for analyzing the mechanism of abrasive wear of gears and predicting wear life.

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“…Several investigations concerning polymer gears have utilized polymer-polymer gear pairs. Recently, the wear and durability of unreinforced and glass-fiber reinforced polyoxymethylene (POM) gears were evaluated by Mao et al 3 Soudmand and Shelesh-Nezhad 4 examined the wear characteristics of gears made of nanocomposites based on poly(butylene terephthalate).…”

Section: Introductionmentioning

confidence: 99%

Effect of metal and polymer mating gears on the bending fatigue performance of asymmetric polymer gears

Pandian

Gautam

Senthilvelan

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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The material of the mating gear influences the fatigue life of polymer gears. The bending fatigue characteristics of polyamide 66 asymmetric gears (34°/20° and 20°/34°) corresponding to steel–polymer and polymer–polymer material combinations were investigated. The performance of symmetric gear pairs (20°/20°) was determined to serve as a comparison. Quasi-static numerical simulations were performed in a finite element analysis tool to predict root bending stress, load sharing ratio, and tooth deflection. The bending fatigue strength of steel–polymer and polymer–polymer pairs of each test configuration was determined using bending fatigue tests. The load sharing ratio and root bending stress of polymer–polymer pairs decreased substantially compared to steel–polymer pairs. The extent of deflection-induced load sharing was greater in polymer–polymer pairs. The bending fatigue life of polymer–polymer pairs was lower than that of steel–polymer pairs owing to the higher operating temperature. In polymer–polymer pairs, polymer driving and driven gears increased the heat generated and diminished the heat dissipation to the environment. In steel–polymer and polymer–polymer pairs, the configuration with the highest bending fatigue strength was 34°/20° and 20°/34°, respectively. This divergence was caused by the increase in temperature difference between the two configurations for polymer–polymer pairs. Analysis of hysteresis loops indicated that the loop area was higher for polymer–polymer pairs, signifying the increased amount of dissipated energy. No noticeable variation was observed between the failure modes of steel–polymer and polymer–polymer pairs despite the significant difference in the operating temperatures. The bending stress and operating temperature were the dominant factors affecting the performance of steel–polymer and polymer–polymer gear pairs, respectively.

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Failure and wear analysis of poly(butylene terephthalate) nanocomposite spur gears

Cited by 22 publications

References 55 publications

Synergetic impacts of two rigid nano‐scale inclusions on the mechanical and thermal performance of POM/carbon black/CaCO₃ ternary nanocomposite systems

Synergetic impacts of two rigid nano‐scale inclusions on the mechanical and thermal performance of POM/carbon black/CaCO₃ ternary nanocomposite systems

Study on Wear Mechanism of Helical Gear by Three-Body Abrasive Based on Impact Load

Effect of metal and polymer mating gears on the bending fatigue performance of asymmetric polymer gears

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Failure and wear analysis of poly(butylene terephthalate) nanocomposite spur gears

Cited by 22 publications

References 55 publications

Synergetic impacts of two rigid nano‐scale inclusions on the mechanical and thermal performance of POM/carbon black/CaCO3 ternary nanocomposite systems

Synergetic impacts of two rigid nano‐scale inclusions on the mechanical and thermal performance of POM/carbon black/CaCO3 ternary nanocomposite systems

Study on Wear Mechanism of Helical Gear by Three-Body Abrasive Based on Impact Load

Effect of metal and polymer mating gears on the bending fatigue performance of asymmetric polymer gears

Contact Info

Product

Resources

About

Synergetic impacts of two rigid nano‐scale inclusions on the mechanical and thermal performance of POM/carbon black/CaCO₃ ternary nanocomposite systems

Synergetic impacts of two rigid nano‐scale inclusions on the mechanical and thermal performance of POM/carbon black/CaCO₃ ternary nanocomposite systems