A numerical analysis of the contact stress distribution and physical modelling of abrasive wear in the tram wheel-frog system

Kuminek, Tomasz; Aniołek, Krzysztof; Młyńczak, Jakub

doi:10.1016/j.wear.2015.02.018

Cited by 29 publications

(16 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As mentioned above, the decrease in the friction coefficient and weight loss resulted from the enhancement in the load-carrying capacity of the nanocomposites after the HA addition. The load-carrying capacity can be evaluated by measuring the contact stress generated along the nanocomposite surface during the friction test [ 63 ]. Consequently, in the current study, a finite element model for the reciprocating frictional test was constructed by utilizing the explicit dynamics package of the ANSYS software, as shown in Figure 11 .…”

Section: Resultsmentioning

confidence: 99%

Effect of Low Hydroxyapatite Loading Fraction on the Mechanical and Tribological Characteristics of Poly(Methyl Methacrylate) Nanocomposites for Dentures

et al. 2021

View full text Add to dashboard Cite

Denture base materials need appropriate mechanical and tribological characteristics to endure different stresses inside the mouth. This study investigates the properties of poly(methyl methacrylate) (PMMA) reinforced with different low loading fractions (0, 0.2, 0.4, 0.6, and 0.8 wt.%) of hydroxyapatite (HA) nanoparticles. HA nanoparticles with different loading fractions are homogenously dispersed in the epoxy matrix through mechanical mixing. The resulting density, Compressive Young’s modulus, compressive yield strength, ductility, fracture toughness, and hardness were evaluated experimentally; the friction coefficient and wear were estimated by rubbing the PMMA/HA nanocomposites against stainless steel and PMMA counterparts. A finite element model was built to determine the wear layer thickness and the stress distribution along the nanocomposite surfaces during the friction process. In addition, the wear mechanisms were elucidated via scanning electron microscopy. The results indicate that increasing the concentration of HA nanoparticles increases the stiffness, compressive yield strength, toughness, ductility, and hardness of the PMMA nanocomposite. Moreover, tribological tests show that increasing the nanoparticle weight fraction considerably decreases the friction coefficient and wear loss.

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of Low Hydroxyapatite Loading Fraction on the Mechanical and Tribological Characteristics of Poly(Methyl Methacrylate) Nanocomposites for Dentures

et al. 2021

View full text Add to dashboard Cite

show abstract

“…2. When designing this station, the particular attention was paid to the diagnostic signals [15][16][17] and the reliable operation [18][19][20][21] (both in terms of power supply systems [22,23] as well as the impact of electromagnetic interference [24,25]) by using appropriate reliability structures. During the design of the laboratory station, a manner of the force application, direction and variability in time.…”

Section: Preparing a Skeletal Denture Researchmentioning

confidence: 99%

Automatic system for measuring shifts and deformation of dental prostheses

2016

View full text Add to dashboard Cite

The paper presented a multipurpose system for testing of dental prostheses within the static and kinematic conditions as well as the conditions of its stability quick analysis. The common goal of prosthetics specialists is to define biomechanical criteria shaping the restorations to protect the existing state of the biological substrate [1]. In prosthesis biomechanics, the gingival soft tissue, as substances with heterogeneous properties, are difficult to individual assessment of the value, direction and duration of the occlusion forces transmitted by the prosthesis in the life cycle [2]. More predictable are static or kinematic behaviors, reflecting the mechanical states of prosthesis design with designed shape and material properties which are possible to determine. However, static measurements of dentures do not reflect their work in natural conditions [3], and can only designate the values of selected parameters (deflection, stress) during the reference of constant load values. The article presents the author's research stand for kinematic loads testing, which are similar to natural ones during shredding of food. The results of stress and strain of denture prosthesis, identified during laboratory tests, will be used to verify the mathematical models of dentures during kinematic forces.

show abstract

“…The obtained characteristics of the supporting frame for the micro-turbines [12][13][14][15] have shown that such a construction was not sufficiently vibration-resistant in the frequency range up to 80 Hz. Moreover, the highest displacements of the entire structure occurred at the frequencies of around 6.5 Hz, 34 Hz and 38 Hz, resulting in the reduction in stiffness value (Fig.…”

Section: Displacement Of the Turbogeneratorsmentioning

confidence: 99%

Analysis of dynamic compliance of the supporting structure for the prototype of organic Rankine cycle micro-turbine with a capacity of 100 kWe

Bagiński¹,

Żywica²

2016

J. vibroeng.

View full text Add to dashboard Cite

The article describes the research carried out using a complex numerical model which had been developed applying finite element method (FEM). The supporting structure on which two turbine generators (with a target capacity of approx. 100 kWe) were placed was the object of this study. The calculations were aimed to determine the influence of dynamic properties of the supporting structure on the operation of turbogenerators. Within this study the following tasks have been accomplished: computational modal analysis was performed, the stiffness coefficients of the tested construction were determined and compared with the dynamic properties of the bearings used. This was necessary in order to analyze the dynamic interaction between the rotor and the turbine's bearings.

show abstract

A numerical analysis of the contact stress distribution and physical modelling of abrasive wear in the tram wheel-frog system

Cited by 29 publications

References 8 publications

Effect of Low Hydroxyapatite Loading Fraction on the Mechanical and Tribological Characteristics of Poly(Methyl Methacrylate) Nanocomposites for Dentures

Effect of Low Hydroxyapatite Loading Fraction on the Mechanical and Tribological Characteristics of Poly(Methyl Methacrylate) Nanocomposites for Dentures

Automatic system for measuring shifts and deformation of dental prostheses

Analysis of dynamic compliance of the supporting structure for the prototype of organic Rankine cycle micro-turbine with a capacity of 100 kWe

Contact Info

Product

Resources

About