scholarly journals CONTACT PAIR STRUCTURES AND ASSOCIATED METRICS

2009 ◽  
Author(s):  
G. Bande ◽  
A. Hadjar
Keyword(s):  
Contact Pair

scholarly journals EVALUATION OF STRENGTH OF SPHERICAL CONTACT PAIRS OF AVIATION STRUCTURES

Aviation ◽  
2010 ◽  
Vol 14 (2) ◽  
pp. 33-37
Author(s):  
Antanas Žiliukas ◽  
Bronius Merkys
Keyword(s):  
Strength Criterion ◽  
Contact Pair ◽  
Spherical Contact ◽  
Suggested Criterion

The strength criterion is used to evaluate the spherical contact pairs of the aviation structures. The strength criterion helps evaluate triaxial tension in the contact pair. Calculations reveal the acceptability of the suggested criterion. Santrauka Kontaktiniu poru stiprumui ivertinti taikomas stiprumo kriterijus, kuris naudojamas sudetingo itempiu būvio atvejais. Ši metodika leidžia skaičiavimuose atsisakyti empiriniu koeficientu. Gauti skaičiavimu rezultatai rodo kriterijaus priimtinuma, palyginti su eksperimentiniais.

A Numerical Simulation of Fretting Wear considering the Dynamic Evolution of Debris for the Coated Contact Surface

2021 ◽  
pp. 1-49
Author(s):  
Li Xiao ◽  
Yingqiang Xu ◽  
Zhiyong Chen
Keyword(s):  
Fretting Wear ◽  
Contact Pair ◽  
Dynamic Evolution ◽  
Wear Depth ◽  
Wear Coefficient ◽  
Wear Model ◽  
Wear Process ◽  
Dlc Coating ◽  
Wear Life ◽  
Wear Calculation

Abstract In this paper, a multi-layer body model in which material properties and wear coefficient change with node coordinates is proposed, so that the wear profile is not restricted by the singularity of the interface of the coated contact pairs. The conversion rate of the adhered particles was obtained to describe the growth and expansion of the debris at the fretting interface based on experiments, and the wear model of coated contact pair considering the dynamic evolution of the debris layer was established. By comparing the previous experimental and computational results, the wear calculation method proposed in this paper is more reasonable to predict the wear profile of the coated contact pair. In addition, the influence of the debris layer on the wear depth, friction width, and contact pressure in the fretting process is analyzed, indicating that the existence of the debris layer can delay the wear process. Finally, the fretting wear life of the SCMV steel contact pair deposited with the W-DLC coating is estimated.

Wear of Low Temperature Degradation-Free Zirconia/Alumina Composites in a Ceramic-Ceramic Contact Pair

2006 ◽  
pp. 1265-1268
Author(s):  
Kwon Yong Lee ◽  
Hwan Kim ◽  
Dae Joon Kim ◽  
Myung Hyun Lee ◽  
Won Seon Seo
Keyword(s):  
Low Temperature ◽  
Contact Pair ◽  
Alumina Composites

Research on Temperature Stress for Contacts Reliability of Electric Connector

2014 ◽  
Vol 945-949 ◽  
pp. 1082-1085
Author(s):  
Yong Ying Du ◽  
Zhi Li Sun
Keyword(s):  
Temperature Field ◽  
Temperature Stress ◽  
Transfer Functions ◽  
Early Stage ◽  
Field Analysis ◽  
Contact Pair ◽  
Temperature Structure ◽  
Electrical Connector ◽  
Electric Connector ◽  
The Impact

Temperature induced degradation is a widely recognized failure phenomenon.However, the basic mechanisms that control the onset and progression of such behavior are not well understood and are a topic of considerable interest in the electrical connector community. In this paper, the simulation analysis of temperature field on this topic are described. The distribution graph of temperature field for the electrical connectors and the highest temperature of the surface of electrical connector was achieved by analyzing a single blade/receptacle contact pair FEA model. A mathematical model was developed that related the early stage temperature levels for the connectors.Additionally, the thermal deformation caused by the temperature had little effect on the contact stress based on temperature - structure coupling field analysis for the electrical connector, the impact of temperature on the electrical connector was mainly reflected in the rate of oxidation of the metal surface. The failure physical process of the electric connector was drawn under temperature stress through the model and theory analysis for the electrical connector , and reliability growth program of the electrical connector was achieved under the temperature influence. The same transfer functions for one type of contact pair were obtained from the simulation, and the results showed that for this limited system, finite element modeling and analysis have great potential for evaluating the influence of design variations on degradation behavior.

Study on Logarithmic Crowning of Tapered Roller Profile Considering Angular Misalignment

2020 ◽  
Vol 142 (11) ◽  
Author(s):  
Zhenghai Wu ◽  
Yingqiang Xu ◽  
Kaian Liu
Keyword(s):  
Concentration Effect ◽  
Contact Pair ◽  
Angular Misalignment ◽  
Finite Line Contact ◽  
Finite Line ◽  
Tapered Roller ◽  
Profile Design ◽  
Roller Profile ◽  
Stress Concentration Effect ◽  
Contact Field

Abstract The angular misalignment of the tapered roller contact pair aggravates the stress edge effect and the stress concentration effect at the contact field, which in turn would affect bearing capacity and fatigue life of the contact pair. In this paper, based on the angular misalignment, the geometric interference model of the tapered roller contact pair was established. And two types of logarithmic crowning models for the roller profile design were theoretically deduced, in which design redundancy was considered through the quadratic processing of the pre-pressure. Then, with the discrete convolution and fast Fourier transform (DC-FFT) method and the conjugate gradient method (CGM), contact characteristics of the tapered roller with these two logarithmic profiles were verified. The results show that two profiles can effectively prevent the stress edge/concentration effect, improve contact pressure distribution and stress field of the roller in misalignment state, and ensure that the contact condition in alignment state is not greatly affected. The logarithmic crowning scheme is also suitable for the profile design of heavy-duty tapered rollers and can provide a reference for the crowning of other finite-line contact pairs under angular misalignment.

Fretting Characteristics and Environmental Reliability of Au-Sn Contact Pairs

2019 ◽  
Vol 953 ◽  
pp. 115-120 ◽  
Author(s):  
Xue Yan Lin ◽  
Hai Tao Hao ◽  
Min Xie
Keyword(s):  
Contact Resistance ◽  
Ambient Temperature ◽  
Contact Force ◽  
Salt Spray ◽  
Test System ◽  
Resistance Test ◽  
Contact Pair ◽  
Simulation Experiments ◽  
Micro Motion ◽  
Environmental Simulation

Based on the laboratory micro-motion contact resistance test system, fretting characteristics of the two contact pairs of gold-plated probe and tin-plated samples, gold-plated samples and tin-plated probe, is carried out at different plating thickness, contact force and temperatures. The contact pairs after the fretting experiment were subjected to temperature and humidity test and salt spray test to analyze its environmental reliability. 0.76μmAu-Sn has better fretting characteristics than 4μm Sn-Au. When the contact force is greater than or equal to 100 gf, the two kinds of contact pair exhibit good fretting characteristics. Thickness of sample plating is more important than that of probe. The influence of ambient temperature on fretting contact performance is the weakest. The increase of contact resistance of contact pair 4μm Sn-Au is higher than that of 0.76μmAu-Sn after accelerated environmental simulation experiments.

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