scholarly journals Analisis Keausan Line Contact Menggunakan Permodelan Global Incremental Wear Model

2021 ◽  
Vol 17 (2) ◽  
pp. 121
Author(s):  
Asdiar Surya Kurniawan
Keyword(s):  
Line Contact ◽  
Wear Model ◽  
Pin On Disc

Keausan merupakan fenomena tribologi yang terjadi pada setiap peralatan akibat kontak mekanik antara dua komponen. Dalam kurun waktu yang lama keausan ini akan menimbulkan kerusakan pada peralatan. Untuk meningkatkan keandalan dan efisiensi peralatan, maka fenomena keausan ini perlu dikaji lebih lanjut. Penelitian ini bertujuan menghitung kedalaman aus dan volume aus sebuah pin berbentuk silinder pendekatan line contact menggunakan tribometer pin-on-disc. Variasi yang dilakukan adalah pembebanan yaitu sebesar 6 N, 8 N, dan 10 N. Pengujian keausan dilakukan pada keadaan tanpa pelumas. Hasil eksperimen kemudian dibandingkan dengan metode analitik GIWM (Global Incremental Wear Model). Hasil penelitian memperlihatkan bahwa eksperimen tribometer pin-on-disc dan GIWM sama-sama berbanding lurus dengan pembebanan. Pada beban 10 N dengan jarak sliding 904,32 m memiliki kedalaman aus 2,46096E-05 m dan volume keausan 1,62778E-08 m3. Pada beban 6 N pada jarak sliding yang sama memiliki kedalaman aus 1,75067E-05 m dan volume aus 9,76666E-09 m3. Semakin bertambah pembebanan dan jarak sliding maka nilai keausan semakin bertambah.

An adhesive wear model for helical gears in line-contact mixed elastohydrodynamic lubrication

Wear ◽  
2019 ◽  
Vol 426-427 ◽  
pp. 896-909 ◽  
Author(s):  
Hongbing Wang ◽  
Changjiang Zhou ◽  
Yuying Lei ◽  
Zhongming Liu
Keyword(s):  
Adhesive Wear ◽  
Elastohydrodynamic Lubrication ◽  
Line Contact ◽  
Wear Model ◽  
Helical Gears

scholarly journals A Multi-scale Contact Temperature Model for Dry Sliding Rough Surfaces

2021 ◽  
Vol 69 (4) ◽  
Author(s):  
Jamal Choudhry ◽  
Andreas Almqvist ◽  
Roland Larsson
Keyword(s):  
Surface Roughness ◽  
Interface Temperature ◽  
Temperature Model ◽  
Flash Temperature ◽  
Wear Model ◽  
Multi Scale ◽  
Proposed Model ◽  
Model Predictions ◽  
Pin On Disc ◽  
Effect Of Surface

AbstractA multi-scale flash temperature model has been developed and validated against existing work. The core strength of the proposed model is that it can be adapted to predict flash contact temperatures occurring in various types of sliding systems. In this paper, it is used to investigate how different surface roughness parameters affect the flash temperatures. The results show that for decreasing Hurst exponents as well as increasing values of the high-frequency cut-off, the maximum flash temperature increases. It was also shown that the effect of surface roughness does not influence the average interface temperature. The model predictions were validated against data from an experiment conducted in a pin-on-disc machine. This also showed the importance of including a wear model when simulating flash temperature development in a sliding system.

Analytic Calculation and Experimental Study on the Wear of the Slide Guide of Machine Tool Considering Boundary Lubrication

2020 ◽  
Vol 142 (7) ◽  
Author(s):  
Yanqing Tan ◽  
Lianjie Ma
Keyword(s):  
Machine Tool ◽  
Boundary Lubrication ◽  
Friction Surface ◽  
Quantitative Relationship ◽  
Calculation Model ◽  
Machining Accuracy ◽  
Feed System ◽  
Wear Model ◽  
Precision Design ◽  
Pin On Disc

Abstract A slide guide is the core component of a machine tool feed system, and its wear significantly affects feeding accuracy, machining accuracy, and product quality. This study aims to obtain a suitable wear calculation model for the slide guide under working conditions. The slide guide is a typical plane sliding pair. Based on the principle of friction fatigue, the wear model of plane sliding pairs had been previously established without considering lubrication. Actually, the friction surface of the slide guide is in the state of boundary lubrication when it works normally. In this study, the analysis on the interactions among friction surface asperities covered with a boundary film indicated that the wear model of plane sliding pairs was also applicable to calculate the wear of the slide guide under boundary lubrication by substituting the friction coefficient µ and the fatigue exponent k under lubricating conditions into the wear model. Then, a series of pin-on-disc wear tests with material specimens of the slide guide under boundary lubrication were designed with the working load and working speed of the pair as the experimental parameters. The comparison between the experimental results and calculated results showed that the wear model of plane sliding pairs could be used to predict the wear of the slide guide under boundary lubrication. The wear model reflected the quantitative relationship between the wear rate of the slide guide and its main influencing factors. The study also provides the basis for the tribological design and precision design of the slide guide.

A Finite Element Based Technique for Simulating Sliding Wear

2005 ◽  
Author(s):  
V. Hegadekatte ◽  
N. Huber ◽  
O. Kraft
Keyword(s):  
Finite Element ◽  
Material Properties ◽  
Sliding Wear ◽  
High Surface ◽  
Volume Ratio ◽  
Wear Model ◽  
Contact Information ◽  
Pin On Disc ◽  
Set Up ◽  
Operating Cycles

Micro-machines are known to fail prematurely due to excessive wear by virtue of their inherent high operating frequencies and high surface to volume ratio. In order to predict wear and eventually the life-span of such complex systems, several hundreds of thousand operating cycles have to be simulated. Due to the complexity of wear, the existing wear models are insufficient to reliably predict wear based on the material properties and the contact information. As a first step, a technique has been developed which involves post processing of the results from a finite element (FE) contact simulation with a simple wear model to compute wear. The technique can be used to simulate wear in a pin-on-disc set-up in order to improve and verify the wear models.

scholarly journals Tribological Properties of Al2O3 Nanoparticles as Lithium Grease Additives

Lubricants ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 9
Author(s):  
Ahmed Nabhan ◽  
Ahmed Rashed ◽  
Nouby M. Ghazaly ◽  
Jamil Abdo ◽  
M. Danish Haneef
Keyword(s):  
Tribological Properties ◽  
Wear Scar ◽  
Al2o3 Nanoparticles ◽  
Lithium Grease ◽  
Pin On Disc ◽  
Scar Width

The tribological properties of Lithium grease specimens with different concentrations of Al2O3 nanoparticles were investigated using a pin on disc apparatus under different sliding speeds and normal loads. Results showed that Al2O3 nanoparticles enhanced the tribological properties of lithium grease and reduced the COF and wear scar width by approximately 57.9% and 47.5% respectively.

scholarly journals Simulation and Experimental Study on Wear of U-Shaped Rings of Power Connection Fittings under Strong Wind Environment

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 735
Author(s):  
Songchen Wang ◽  
Xianchen Yang ◽  
Xinmei Li ◽  
Cheng Chai ◽  
Gen Wang ◽  
...  
Keyword(s):  
Abrasive Wear ◽  
Adhesive Wear ◽  
Surface Hardness ◽  
Wear Depth ◽  
Strong Wind ◽  
Wear Model ◽  
Wind Environment ◽  
Simulation Results ◽  
Oxidation Wear ◽  
Good Agreement

The objective of this study was to investigate the wear characteristics of the U-shaped rings of power connection fittings, and to construct a wear failure prediction model of U-shaped rings in strong wind environments. First, the wear evolution and failure mechanism of U-shaped rings with different wear loads were studied by using a swinging wear tester. Then, based on the Archard wear model, the U-shaped ring wear was dynamically simulated in ABAQUS, via the Umeshmotion subroutine. The results indicated that the wear load has an important effect on the wear of the U-shaped ring. As the wear load increases, the surface hardness decreases, while plastic deformation layers increase. Furthermore, the wear mechanism transforms from adhesive wear, slight abrasive wear, and slight oxidation wear, to serious adhesive wear, abrasive wear, and oxidation wear with the increase of wear load. As plastic flow progresses, the dislocation density in ferrite increases, leading to dislocation plugs and cementite fractures. The simulation results of wear depth were in good agreement with the test value of, with an error of 1.56%.

scholarly journals Dry Sliding Behavior of an Aluminum Alloy after Innovative Hard Anodizing Treatments

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3281
Author(s):  
Chiara Soffritti ◽  
Annalisa Fortini ◽  
Anna Nastruzzi ◽  
Ramona Sola ◽  
Mattia Merlin ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Substrate ◽  
Dry Sliding ◽  
Aluminum Oxides ◽  
Wear Rates ◽  
Anodic Aluminum ◽  
Hard Anodizing ◽  
Pin On Disc ◽  
Diffuse Reflectance Infrared ◽  
Wear Tests

This work evaluates the dry sliding behavior of anodic aluminum oxides (AAO) formed during one traditional hard anodizing treatment (HA) and two golden hard anodizing treatments (named G and GP, respectively) on a EN AW-6060 aluminum alloy. Three different thicknesses of AAO layers were selected: 25, 50, and 100 μm. Prior to wear tests, microstructure and mechanical properties were determined by scanning electron microscopy (VPSEM/EDS), X-ray diffractometry, diffuse reflectance infrared Fourier transform (DRIFT-FTIR) spectroscopy, roughness, microhardness, and scratch tests. Wear tests were carried out by a pin-on-disc tribometer using a steel disc as the counterpart material. The friction coefficient was provided by the equipment. Anodized pins were weighed before and after tests to assess the wear rate. Worn surfaces were analyzed by VPSEM/EDS and DRITF-FTIR. Based on the results, the GP-treated surfaces with a thickness of 50 μm exhibit the lowest friction coefficients and wear rates. In any case, a tribofilm is observed on the wear tracks. During sliding, its detachment leads to delamination of the underlying anodic aluminum oxides and to abrasion of the aluminum substrate. Finally, the best tribological performance of G- and GP-treated surfaces may be related to the existence of a thin Ag-rich film at the coating/aluminum substrate interfaces.

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