Influence of Stick-Slip Behavior on Friction and Wear under Fretting Conditions

2006 ◽  
Vol 326-328 ◽  
pp. 1189-1192
Author(s):  
Sung Hoon Jeong ◽  
Seok Ju Yong ◽  
Tae Shik Ahn ◽  
Young Ze Lee
Keyword(s):  
Friction And Wear ◽  
Fretting Wear ◽  
Partial Slip ◽  
Dissipated Energy ◽  
Stick Slip ◽  
Steel Surfaces ◽  
Low Amplitude ◽  
Fretting Damage ◽  
Friction And Wear Characteristics ◽  
Slip Phenomenon

Friction and wear characteristics between two steel surfaces under fretting condition are investigated experimentally. The fretting damage caused by low-amplitude oscillatory sliding can be classified into three regimes of gross-slip, mixed-slip and partial-slip due to stick-slip phenomenon. One of the most important characteristics of fretting wear is the transition from gross-slip to mixed-slip. This study was focused on getting the degree of stick-slip out of the friction transition under fretting condition. Fretting wear is divided into three conditions of gross-slip/mixed-slip/ partial-slip. The criteria for the division are friction and displacement amplitude, wear scar morphology and dissipated energy. In this test, friction force and displacement were measured for detecting the transition from mixed-slip to gross-slip and qualitatively predicting the degree of the wear.

Transition of Friction and Wear by Stick-Slip Phenomenon in Various Environments under Fretting Conditions

2006 ◽  
Vol 321-323 ◽  
pp. 1344-1347 ◽  
Author(s):  
Sung Hoon Jeong ◽  
Jung Min Park ◽  
Young Ze Lee
Keyword(s):  
Friction And Wear ◽  
Mineral Oil ◽  
Fretting Wear ◽  
Engine Oil ◽  
Partial Slip ◽  
Tangential Displacement ◽  
Stick Slip ◽  
Wet Friction ◽  
Fretting Damage ◽  
Wear Tests

The fretting wear arises when contacting surfaces undergo oscillatory tangential displacement of small amplitude. Depending on the degree of stick and slip there are three kinds of the contact motions, such as gross-slip, partial-slip and stick-slip. The fretting damage occurs most severely when the transition from gross-slip to partial-slip happens. In this paper, the transitions of friction and wear under fretting were investigated by ball-on-disk wear tests in various environments, which were dry friction of air and nitrogen, and wet friction of mineral oil and engine oil. The transition from partial-slip to stick-slip firstly occurred in nitrogen environment, and then in air. Later, the transition occurred at higher load in mineral oil, and then lastly in engine oil.

A Novel Three-Dimensional Finite Element Model to Simulate Third Body Effects on Fretting Wear of Hertzian Point Contact in Partial Slip

2020 ◽  
Vol 143 (4) ◽  
Author(s):  
Arman Ahmadi ◽  
Farshid Sadeghi
Keyword(s):  
Finite Element ◽  
Material Properties ◽  
Three Dimensional ◽  
Point Contact ◽  
Fretting Wear ◽  
Partial Slip ◽  
Wear Particles ◽  
Third Body ◽  
Stick Slip ◽  
The Third

Abstract In this investigation, a finite element (FE) model was developed to study the third body effects on the fretting wear of Hertzian contacts in the partial slip regime. An FE three-dimensional Hertzian point contact model operating in the presence of spherical third bodies was developed. Both first bodies and third bodies were modeled as elastic–plastic materials. The effect of the third body particles on contact stresses and stick-slip behavior was investigated. The influence of the number of third body particles and material properties including modulus of elasticity, hardening modulus, and yield strength were analyzed. Fretting loops in the presence and absence of wear particles were compared, and the relation between the number of cycles and the hardening process was evaluated. The results indicated that by increasing the number of particles in contact, more load was carried by the wear particles which affect the wear-rate of the material. In addition, due to the high plastic deformation of the debris, the wear particles deformed and took a platelet shape. Local stick-slip behavior over the third body particles was also observed. The results of having wear debris with different material properties than the first bodies indicated that harder wear particles have a higher contact pressure and lower slip at the location of particles which affects the wear-rate.

Wear Prediction in Wheel-Rail Contact under Partial Slip Conditions

2014 ◽  
Vol 658 ◽  
pp. 317-322 ◽  
Author(s):  
George Gavrila ◽  
Spiridon Cretu ◽  
Marcelin Benchea
Keyword(s):  
Numerical Model ◽  
Normal Force ◽  
Rolling Contact ◽  
Experimental Results ◽  
Partial Slip ◽  
Initial Condition ◽  
Dynamic Effects ◽  
Stick Slip ◽  
Slip Conditions ◽  
Slip Phenomenon

This paper presents a numerical model to calculate wear during rolling contact due to micro-slip. Having as initial condition a corrugated rail it is shown the influence of the corrugation wavelength and the dynamic effects of the normal force on the wear creation. Experimental results are presented in order to reveal the influence of roughness when studying the stick-slip phenomenon.

Experimental and Numerical Investigation of Fretting Wear at High Temperature for Aeronautical Alloys

2010 ◽  
Author(s):  
D. Botto ◽  
A. Campagna ◽  
M. Lavella ◽  
M. M. Gola
Keyword(s):  
Three Dimensional ◽  
Experimental Tests ◽  
Fretting Wear ◽  
Numerical Code ◽  
Dissipated Energy ◽  
Hysteresis Cycle ◽  
Set Up ◽  
Wear Law ◽  
Low Amplitude ◽  
The Given

Fretting wear is a complex phenomenon that occurs at component interfaces that undergo low amplitude oscillation under high contact pressure. The aim of this paper is to investigate the fretting behavior of contact interfaces both with experiments and numerical code. The hysteresis cycles have been measured through the experiment and, at the end of the test, the worn volume has been determined. A numerical code has been developed to predict worn volume. The three-dimensional elastic contact problem has been solved by using a semi-analytical half space model. The numerical code uses a wear law for which the worn volume is proportional to the dissipated energy during the hysteresis cycle. The wear coefficient has been iteratively determined by comparing the theoretical results with the experimental tests. The main results of this work is the set up of a wear model for the given geometry and materials.

Influence of Contact States on the Dynamic Behavior of Rubbing Structures

2005 ◽  
Author(s):  
Flavio D’Ambrosio ◽  
Eric Chatelet ◽  
Georges Jacquet
Keyword(s):  
Dry Friction ◽  
High Cycle Fatigue ◽  
Failure Modes ◽  
Working Life ◽  
Dissipated Energy ◽  
Response Functions ◽  
Cycle Fatigue ◽  
Stick Slip ◽  
Contact State ◽  
Slip Phenomenon

One of the most common failure modes for turbomachinery wheels is associated to high-cycle fatigue of blades. A classical way to extend the working life of those structures is obtained through the introduction of specific devices in order to reduce vibrational amplitudes during resonance. Different kinds of components are used such as shrouds and wires within power industry and under platform limiters for aeronautics. Dry friction between the devices and blades induces non linear behaviors and flattens the associated frequency response functions (FRF). Even if this phenomena is now well known, different interpretations are presented in bibliography to explain the origin of this flattening. The most common one is based on the dissipated energy while more recent studies propose a different approach and explain peak flattening by changes in boundary conditions induced by the stick/slip phenomenon. The objective of the proposed study is to progress towards a better understanding of the flattening phenomena during vibration of bladed assemblies in presence of dry friction. A simple case is analyzed in order to show the contribution of respectively energy dissipation and changes of contact state on peak levels.

Friction and Wear Characteristics of Natural Iron Sand Coating

2003 ◽  
Author(s):  
Yasuo Kondo ◽  
Takao Koide ◽  
Kouitsu Miyachika ◽  
Fumio Obata
Keyword(s):  
Oxide Film ◽  
Friction And Wear ◽  
Striking Similarity ◽  
Load Range ◽  
Stick Slip ◽  
Wear Characteristics ◽  
Sliding Surfaces ◽  
Natural Iron ◽  
Sand Particles ◽  
Friction And Wear Characteristics

Friction and wear characteristics of natural iron sand coating were experimentally examined in the absence of lubricant. The friction motion was not be continuous, but be intermittent and proceeded by a process of stick-slip. An oxide film, Fe2O3, was formed along the sliding marks, but the amount of coating worn away was slight. There is a striking similarity in the friction coefficient between the zinc/iron sand coating and MoS2 over a load range of 20N to 1000N. The iron sand coating has a spongy structure and the bonding strength between the iron sand particles is so small that the metallic junction formed between sliding surfaces may be weaker than the substrate. Consequently the amount of metal removed may be small. In addition, the oxide film formed on coating is so soft and fluid that it may in itself function as lubricants and may play little part in abrading the other surface.

Fretting Wear Behavior and Damage Mechanisms of Inconel X-750 Alloy in Dry Contact Condition

2019 ◽  
Vol 141 (4) ◽  
Author(s):  
Ibrohim Rustamov ◽  
Gaolong Zhang ◽  
Margarita Skotnikova ◽  
Yuming Wang ◽  
Zixi Wang
Keyword(s):  
Normal Load ◽  
Fatigue Cracks ◽  
Contact Condition ◽  
Fretting Wear ◽  
Partial Slip ◽  
Small Displacement ◽  
Stick Slip ◽  
Damage Mechanisms ◽  
Normal Loading ◽  
Dry Contact

Frictional and fretting wear behaviors of Inconel X-750 alloy against GCr15 steel ball were investigated in dry contact condition with ∼60% air humidity. Fretting tests were run at the high frequency tribosystem SRV 4 in room temperature and ball-on-flat contact configuration were adopted with the relative oscillatory motion of small displacement amplitude (40 μm). Sliding regimes, wear volumes, frictional properties, and material damage mechanisms were studied with regard to different normal loading and test durations. After the tests, the worn surface morphologies were analyzed by three-dimensional (3D) optical surface profiler, scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) to distinguish fretting running conditions and material responses for different test cases. It was found that the material removals by abrasive and adhesive wear, debris formation and oxidization, and wear delamination were the main damage mechanisms under the lower normal load where the full slide or gross slip regime (GSR) was dominant between the contact surfaces. On the other hand, fretting regime was found to be a stick-slip or a partial slip at greater loads where damage mechanisms were correlated with deformed asperities, fatigue cracks, and thick layer removal due to highly concentrated cyclic stresses. Time dependence was crucial during GSR where the wear volume increased substantially; however, the wear volumes and scars sizes were consistent over time because of stick-slip effects under the higher normal load.

scholarly journals The Effect of Displacement Amplitude on Fretting Wear Behavior and Damage Mechanism of Alloy 690 in Different Gaseous Atmospheres

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5778
Author(s):  
Long Xin ◽  
Lanzheng Kang ◽  
Weiwei Bian ◽  
Mengyang Zhang ◽  
Qinglei Jiang ◽  
...  
Keyword(s):  
Wear Behavior ◽  
Displacement Amplitude ◽  
Fretting Wear ◽  
Partial Slip ◽  
Wear Volume ◽  
Stick Slip ◽  
Slip Regime ◽  
Mixed Regime ◽  
Alloy 690 ◽  
Strong Adhesion

The effect of displacement amplitude on fretting wear behavior and damage mechanisms of alloy 690 in air and nitrogen atmospheres was investigated in detail. The results showed that in air, the friction coefficient gradually increased with the increase in displacement amplitude which conformed to the universal law. In nitrogen, however, it had the highest point at the displacement amplitude of 60 μm due to very strong adhesion. Whether in air or nitrogen, the wear volume gradually increased with the increase in displacement amplitude. The wear volume in air was larger than that in nitrogen except at 30 μm. At 30 μm, the wear volume in air was slightly smaller. With an increase in displacement amplitude, a transformation of fretting running status between partial slip, mixed stick-slip, and final gross slip occurred along with the change of Ft-D curves from linear, to elliptic, to, finally, parallelogrammical. Correspondingly, the fretting regime changed from a partial slip regime to a mixed regime to a gross slip regime. With the increase in displacement amplitude, the transition from partial slip to gross slip in nitrogen was delayed as compared with in air due to the strong adhesion actuated by low oxygen content in a reducing environment. Whether in air or nitrogen, the competitive relation between fretting-induced fatigue and fretting-induced wear was prominent. The cracking velocity was more rapid than the wear. Fretting-induced fatigue dominated at 30 μm in air but at 30–60 μm in nitrogen. Fretting-induced wear won the competition at 45–90 μm in air but at 75–90 μm in nitrogen.

scholarly journals Comparison of Shot Peening and Nitriding Surface Treatments under Complex Fretting Loadings

2006 ◽  
Vol 513 ◽  
pp. 105-118 ◽  
Author(s):  
Krzysztof Kubiak ◽  
Siegfried Fouvry ◽  
Bogdan Wendler
Keyword(s):  
Surface Engineering ◽  
Surface Treatments ◽  
The Other ◽  
Fretting Wear ◽  
Partial Slip ◽  
Original Sequence ◽  
The Past ◽  
New Treatments ◽  
Fretting Damage ◽  
Critical Challenge

Considered as a plague for numerous industrial assemblies, fretting associated with small oscillatory displacements is encountered in all quasi-static contacts submitted to vibrations. According to the sliding conditions, fretting cracks and/or fretting wear can be observed in the contact area. On the other hand an important development has been achieved in the domain of surface engineering during the past three decades and numerous new surface treatments and coatings are now available. Therefore there is a critical challenge to evaluate the usefulness of these new treatments and/or coatings against fretting damage. To achieve this objective, a fast fretting methodology has been developed. It consists in quantifying the palliative friction, cracking and wear responses through a very small number of fretting tests. With use of defined quantitative variables, a normalized polar fretting damage chart approach is introduced. Finally, to evaluate the performance of the assemblies after these protective surface treatments under complex fretting loadings, an original sequence of partial slip and gross slip sliding procedure has been applied. It has been demonstrated that performing of a very short sequence of gross slip fretting cycles can critically decrease the resistance of the treated surfaces against cracking failures activated under subsequent partial slip loadings.

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