Uncertainty evaluation of Ruiz parameter for spline coupling wear analysis

2016 ◽  
Vol 230 (16) ◽  
pp. 2888-2895
Author(s):  
Giulio Barbato ◽  
Vincenzo Cuffaro ◽  
Francesca Curà ◽  
Gianfranco Genta ◽  
Andrea Mura
Keyword(s):  
Fretting Wear ◽  
Uncertainty Evaluation ◽  
Specific Design ◽  
Wear Analysis ◽  
The Coefficient Of Friction ◽  
Mechanical Factors ◽  
Rotating Shafts ◽  
Spline Coupling ◽  
Mechanical Elements ◽  
Specific Working

Spline couplings are mechanical elements used to transmit power by joining two coaxial rotating shafts. The main damaging phenomenon on these elements is fretting wear, which can occur on teeth surfaces when there is a relative movement. Therefore, specific design criteria to evaluate teeth damage of spline couplings subjected to fretting wear are needed. In this work, the criterion proposed by Ruiz is considered and criticalities of the first Ruiz parameter are analysed by performing an uncertainty evaluation. The specific working misaligned conditions of a dedicated test rig were considered in this analysis. An uncertainty table allows the comparison of main geometrical and mechanical factors, evidencing their relevant effects. It shows the need of a deeper analysis on the coefficient of friction between the contact surfaces of spline couplings working in misaligned conditions.

scholarly journals Constructiv and Technological Consideration on the Generation of Gear Made by the DLP 3D-Printed Methode

2019 ◽  
Vol 56 (2) ◽  
pp. 440-443
Author(s):  
Mircea Dorin Vasilescu
Keyword(s):  
Optical Microscope ◽  
Functional Domain ◽  
Conserved Quantities ◽  
Technological Parameters ◽  
Specific Design ◽  
Domain Specific ◽  
Cylindrical Gears ◽  
3D Printed ◽  
Mechanical Elements ◽  
The Cost

The aim of the work is conduct to highlight how the technological parameters has influence of 3D printed DLP on the generation of wheel, made from resin type material. In the first part of the paper is presents how to generate in terms of dimensional aspects specific design cylindrical gears, conical and worm gear. Generating elements intended to reduce the cost of manufacturing of these elements. Also are achieve the specific components of this work are put to test with a laboratory test stand which is presented in the paper in the third part of the paper. The tested gears generated by 3D-printed technique made with 3D printed with FDM or DLP technique. After the constructive aspects, proceed to the identification of conserved quantities, which have an impact both in terms of mechanical strength, but his cinematic, in order to achieve a product with kinematic features and good functional domain specific had in mind. The next part is carried out an analysis of the layers are generated using the DLP and FDM method using an optical microscope with magnification up to 500 times, specially adapted in order to achieve both visualization and measurement of specific elements. In the end part, it will highlight the main issues and the specific recommendations made to obtain such constructive mechanical elements.

scholarly journals Evolution of Fretting Wear Behaviors and Mechanisms of 20CrMnTi Steel after Carburizing

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 179 ◽  
Author(s):  
Jinchi Tang ◽  
Xiongfeng Hu ◽  
Fuqiang Lai ◽  
Xiaolong Guo ◽  
Shengguan Qu ◽  
...  
Keyword(s):  
Wear Mechanism ◽  
Engine Speed ◽  
Wear Test ◽  
Fretting Wear ◽  
Wear Volume ◽  
Wear Properties ◽  
The Coefficient Of Friction ◽  
Correlation Trend ◽  
First Time ◽  
Engine Power

In this paper, the fretting wear properties of 20CrMnTi steel, a common material for a rocker bracket, was discussed for the first time after it was suffered carburizing treatment. Subsequently, the fretting wear behaviors of virgin, quenched, and carburized states were studied. The effect of loads (corresponding to different engine power output) and reciprocating frequencies (corresponding to different engine speed) on wear behaviors and mechanisms of carburized specimen were further discussed. The results showed that the coefficient of friction (CoF) and wear volume loss (WVL) of the carburized specimens were significantly lower than that of virgin and quenched states. During the wear test, the surface CoF decreased gradually with the increase of applied load, while the linear correlation trend was not observed with the increase of fretting frequency as it showed an increase first and then a decrease. It was observed that the WVL increased gradually with the increase of load and frequency. With an increase of the load, the wear mechanism gradually deteriorated from the initial adhesive wear to the mixed wear mechanism. When the load was high, the oxidative wear became more severe. However, no significant effect of frequency was observed on the wear mechanism.

The application of fretting wear modelling to a spline coupling

Wear ◽  
2007 ◽  
Vol 262 (9-10) ◽  
pp. 1205-1216 ◽  
Author(s):  
J. Ding ◽  
I.R. McColl ◽  
S.B. Leen
Keyword(s):  
Fretting Wear ◽  
Wear Modelling ◽  
Spline Coupling

Effects of T6 Heat Treatment on Fretting Wear Resistance of the Aluminum-Silicon Alloys

2019 ◽  
Vol 823 ◽  
pp. 69-74
Author(s):  
Yuh Ping Chang ◽  
Li Ming Chu ◽  
Chien Te Liu ◽  
Gao Wei Chen
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Fretting Wear ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
T6 Heat Treatment ◽  
Wear And Tear ◽  
Mechanical Elements ◽  
Competitive Products ◽  
Aluminum Silicon

It is well known that damage caused by wear and tear of the mechanical parts always seriously affect the accuracy of machinery. It is very important to improve the material properties of the mechanical elements. Anti-abrasion can improve the durability of machinery and equipment, thereby enhancing industrial competitiveness. Hence, it is important to establish the key technology of wear resistance for the related industries. Since the aluminum-silicon alloys are commonly used on the conditions of severe fretting wear, it is necessary to improve the fretting wear resistance before they are used. Therefore, effects of T6 heat treatment on fretting wear resistance of the aluminum-silicon alloys were investigated in this study. The experimental results of this paper will be very beneficial to the future of precision machinery and vehicle industry to develop more internationally competitive products.

scholarly journals Fretting wear rate of sulphur deficient MoSx coatings based on dissipated energy

2001 ◽  
Vol 16 (12) ◽  
pp. 3567-3574 ◽  
Author(s):  
Xiaoling Zhang ◽  
W. Lauwerens ◽  
L. Stals ◽  
Jiawen He ◽  
J-P. Celis
Keyword(s):  
Relative Humidity ◽  
Wear Rate ◽  
Coefficient Of Friction ◽  
Contact Stress ◽  
Ambient Air ◽  
Fretting Wear ◽  
Dissipated Energy ◽  
Wear Volume ◽  
The Coefficient Of Friction ◽  
Crystallographic Orientations

The fretting wear of sulphur-deficient MoSx coatings with different crystallographic orientations has been investigated in ambient air of controlled relative humidity. The coefficient of friction and the wear rate of MoSx coatings sliding against corundum depend not only on fretting parameters like contact stress, fretting frequency, and relative humidity, but also strongly on the crystallographic orientation of the coatings. For randomly oriented MoSx coatings, the coefficient of friction and the wear rate increased significantly with increasing relative humidity. In contrast, basal-oriented MoSx coatings were less sensitive to relative humidity. The coefficient of friction of both types of MoSx coatings decreased on sliding against corundum with increasing contact stress and decreasing fretting frequency. A correlation between dissipated energy and wear volume is proposed. This approach allows detection in a simple way of differences in fretting wear resistance between random- and basal-oriented MoSx coatings tested in ambient air of different relative humidity.

Fatigue life prediction for a barrelled spline coupling under torque overload

2003 ◽  
Vol 217 (3) ◽  
pp. 123-142 ◽  
Author(s):  
S B Leen ◽  
I R McColl ◽  
C H H Ratsimba ◽  
E J Williams
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Life Prediction ◽  
Plastic Material ◽  
Three Dimensional ◽  
Fretting Wear ◽  
Life Assessment ◽  
Simple Tension ◽  
Wide Range ◽  
Spline Coupling

Aeroengine spline couplings experience a wide range of loading conditions leading to contrasting service life limiting phenomena, including fatigue, fretting fatigue and fretting wear. Highly loaded couplings may employ incomplete contact axial profiles, while the contact geometry transverse to the spline axis is nominally complete with theoretical stress singularities at the contact edges. Life assessment of such components is consequently complex. The effect of torque overload conditions on the fatigue life of a barrelled, aeroengine type spline coupling is investigated experimentally. The experimental results are interpreted using three-dimensional finite element analyses, incorporating frictional contact and elastic-plastic material behaviour and the results of simple tension-tension fatigue tests. Torque-life and finite element predicted stress-life relationships are generated for spline life prediction purposes. Good correlation is obtained between the spline coupling and simple tension-tension fatigue test results, interpreted via the finite element predicted stress ranges.

Fretting Wear of SiC and Ni3Al Particles Reinforced Al Alloy Matrix Composites

2007 ◽  
Vol 351 ◽  
pp. 75-80
Author(s):  
Rong Chen ◽  
Hong Hua Wang ◽  
Di Zhang ◽  
Guo Ding Zhang
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloy ◽  
Friction And Wear ◽  
Al Alloys ◽  
Fretting Wear ◽  
Al Alloy ◽  
Wear Depth ◽  
Matrix Composites ◽  
Alloy Matrix ◽  
The Coefficient Of Friction

Fretting friction and wear of aluminum alloy, 5 and 10 vol.% SiCp/Al and Ni3Alp/Al composites under 5×10-4 Pa and atmosphere was investigated. Wear mechanism in vacuum was compared to that in atmosphere at different applied loads. The coefficient of friction (COF) of the SiCp/Al composites was larger than aluminum and Ni3Alp/Al composites, however, incorporation of SiC particles into Al alloy increased the fretting wear resistance of Al alloys, especially in vacuum. It should be notices that the maximum wear depth was larger in vacuum under fretting wear, and the Ni3Alp/Al composites show low fretting wear resistance.

scholarly journals Surface Characterization of Spline Coupling Teeth Subjected to Fretting Wear

2014 ◽  
Vol 74 ◽  
pp. 135-142 ◽  
Author(s):  
Vincenzo Cuffaro ◽  
Francesca Curà ◽  
Andrea Mura
Keyword(s):  
Surface Characterization ◽  
Fretting Wear ◽  
Spline Coupling
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