Contact resistance study of high-copper alloys used in power automotive connectors

Abdi, R. El; Beloufa, Amine; Benjemaa, N.

doi:10.1243/09544070jauto799

Cited by 14 publications

(4 citation statements)

References 5 publications

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“…Contact resistance was slightly higher for the harder material C70250 then the other softer materials. It has been shown in an earlier paper (El Abdi et al [24]) that static contact resistance measured under indentation test for C70250 alloy was higher then the other alloys. C70250 copper alloy which contains hard Nickel element has been hardened by precipitation and offer an interesting mechanical properties with high strength, high Young's modulus, high hardness and a low electrical conductivity (table 1) (Zauter and Kudashov [18]).…”

Section: Electrical Contact Resistancementioning

confidence: 81%

Investigation on contact surface damage of automotive connector by fretting corrosion

Beloufa

2010

Tribology and Design

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The main cause of electrical contact resistance degradation by corrosion is the vibration of contact interfaces. The purpose of this paper is to analyse the change of contact resistance under vibration test for uncoated sphere/plane contact made of new high copper alloys. The influence of electrical and mechanical properties of materials and mainly the hardness on contact resistance was studied in this work. During the fretting test, contact point was submitted to 16000 vibration cycles under fretting amplitude of 50 µm and 1 Hz frequency. The sphere part was fixed, while the plane part was submitted to a relative motion. At the end of the test, the fretted surfaces and the wear debris were analysed by scanning electron microscope and energy dispersive X-ray spectroscopy to evaluate damage, oxidation and elemental composition present in the wear surfaces. In addition, the measurement of the wear track profile using a 3D surface scanning system was introduced. Increases contact resistance and contact temperature has been examined during the fretting test. The results showed that the contact resistance for the harder alloy was higher than those obtained for the other materials. In addition, topographic measurement showed that the small wear track corresponds to the harder material. Finally, depending on the hardness and the resistivity, these uncoated materials influence fretting apparition and its level.

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Section: Electrical Contact Resistancementioning

confidence: 81%

Investigation on contact surface damage of automotive connector by fretting corrosion

Beloufa

2010

Tribology and Design

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“…Contact resistance was slightly higher for the harder material C70250 than the other softer materials. It has been shown in an earlier paper [24] that static contact resistance measured under indentation test for C70250 alloy was higher than that of the other alloys. C70250 copper alloy which contains the hard Nickel element has been hardened by precipitation and offers interesting mechanical properties with high strength, high Young's modulus, high hardness and a low electrical conductivity (Table 1) [18].…”

mentioning

confidence: 76%

Investigation on contact surface damage of an automotive connector by fretting corrosion

Beloufa

2017

WIT Transactions on State-of-the-Art in Science and Engineering

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The main cause of electrical contact resistance degradation by corrosion is the vibration of contact interfaces. The purpose of this article is to analyse the change of contact resistance under vibration testing for uncoated sphere/plane contact made of new high-copper alloys. The influence of electrical and mechanical properties of materials and mainly the hardness on contact resistance was studied in this work. During the fretting test, the contact point was submitted to 16,000 vibration cycles under a fretting amplitude of 50 µm and 1 Hz frequency. The spherical part was fixed, while the plane part was submitted to a relative motion. At the end of the test, the fretted surfaces and the wear debris were analysed by scanning electron microscope and energy dispersive X-ray spectroscopy to evaluate damage, oxidation and elemental composition present in the wear surfaces. In addition, the measurement of the wear track profile using a 3D surface scanning system was introduced. Increases in contact resistance and contact temperature have been examined during the fretting test. The results showed that the contact resistance for the harder alloy was higher than that obtained for the other materials. In addition, topographic measurement showed that the small wear track corresponds to the harder material. Finally, depending on the hardness and the resistivity, these uncoated materials influence fretting appearance and its level.

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“…Few research works [17] are available for the typically third order of complexity multiphysics analysis with coupled electrical and mechanical and thermal phenomena. However, most of the studies available in the literature are either focused on electromechanical [6]- [16] or electrothermal [17]- [19] or thermomechanical [20]- [23] approaches. During the sliding motion, the contact resistance temperature is rising spontaneously [17].…”

Section: Introductionmentioning

confidence: 99%

Multiphysics Analysis of Hemispherical Bulk Conductor Hertzian Contact Under Uniaxial Mechanical Load

Ravelo¹,

Peyret

Penas

et al. 2019

IEEE J. Multiscale Multiphys. Comput. Tech.

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A multiphysics model of smoothed contact surface hemispherical contact under dynamic vibration stress is treated in this paper. The contact structure is applied to hemispherical conductor bulk materials. The structure electrothermomechanical (ETM) behavior is investigated based on the Hertz contact theory coupled with electrokinetic approach. An electrical circuit integrating the contact material properties is proposed. The contact surface deformation ETM expression is formulated. The transient variations of the contact conductor material temperatures in function of the mechanical vibrations are analytically described. The ETM parameters range versus the mechanical load stress is analyzed by considering aluminum alloy material hemispherical bulk with a radius varying from 10 µm to 1 mm. The contact radius can be totally deformed when the load is increased up to 20 kN. In addition, an innovative multiphysics computational method is validated numerically to determine the transient variation of the contact surface radius model from SPICE simulation by considering 0.5 kHz/1 kHz frequency presenting 0.5-kN amplitude sine wave, and arbitrary waveform dynamic vibrations. It was conjectured from numerical application, the hemispherical bulk contact temperature, and also the mechanism multiphysics phenomena governing the structure behavior. As ongoing research, the equivalent system tensorial statement illustrating the multiphysics interaction between the conductor contacts will be developed.

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Contact resistance study of high-copper alloys used in power automotive connectors

Cited by 14 publications

References 5 publications

Investigation on contact surface damage of automotive connector by fretting corrosion

Investigation on contact surface damage of automotive connector by fretting corrosion

Investigation on contact surface damage of an automotive connector by fretting corrosion

Multiphysics Analysis of Hemispherical Bulk Conductor Hertzian Contact Under Uniaxial Mechanical Load

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