Table top experimental setup for electrical contact resistance measurement during indentation

Dutta, Sudipta; Vikram, G N V R; Bobji, M. S.; Mohan, S.

doi:10.1016/j.measurement.2019.107286

Cited by 8 publications

(10 citation statements)

References 22 publications

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“…The current flow through the indenter/sample contact was monitored during loading and unloading in traditional and cyclic indentation experiments for GaAs. Compared with those as reported in Gridneva et al [14][15][16][17][18][19][20][21][22][23][24][25], the in situ electrical characterization method proposed in this research was low-cost and the measurement was easy to establish in most indentation system only if a conductive indenter was used. Experimental results showed a steady increase of conductivity in GaAs associated with the applied indentation force, while the applied bias had no effect on the mechanical performance of the sample.…”

Section: Introductionmentioning

confidence: 87%

“…In their report, a phase transformation was argued to be the fundamental cause of nanoscale plasticity in GaAs, leading to a revision of the dislocation-based understanding of nanoscale plasticity. Recently, Dutta et al [25] reported a table top experimental setup for the electrical contact resistance measurement during indentation and verified the method by indenting a porous-alumina-Ni nanocomposite material.…”

Section: Introductionmentioning

confidence: 95%

“…Nanoindentation experiments have been proven to provide considerable insights into the evolution of materials properties during indentation loading and unloading at the level of micro-and nano-scales [9][10][11][12][13]. Based on the nanoindentation technique, a so called in situ electrical characterization method [14][15][16][17][18][19][20][21][22][23][24][25] which enables us to record precisely both the mechanical response of the deformed materials and the accompanying electrical effect has been developed. Owing to this method, the pressure-induced conductivity changes in semiconductors could be related with the mechanical performance of materials and have been a topic of extensive research over the past decades.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electrical-mechanical coupling performance of gallium arsenide under nanoindentation

Xu¹,

Kong²,

Liu³

et al. 2020

Semicond. Sci. Technol.

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In this research, the electrical-mechanical coupling performance of gallium arsenide (GaAs) crystalline has been investigated by carrying out the in situ electrical measurement experiments which enabled us to record precisely both the mechanical behavior of the nanodeformed GaAs and the accompanying electrical response during nanoindentation. An effective and precise In situ electrical measurement system has been set up by introducing a conductive diamond indenter and both traditional and cyclic nanoindentation experiments have been performed. The experimental results showed that the application of indentation force caused a significant increase in the current flow due to the pressure-induced metallic phase transition of GaAs, and the magnitude of current flow was increased with increasing either the applied force or voltage. Furthermore, the current flow showed symmetric changes with the indentation loading and unloading, indicating a fully reversible metallic phase transformation of GaAs in indentation. On the other hand, the externally applied voltage (electrical field) was observed to barely affect the indentation force-depth curve (mechanical performance) of GaAs in respect of Young's modulus and hardness.

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Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrical-mechanical coupling performance of gallium arsenide under nanoindentation

Xu¹,

Kong²,

Liu³

et al. 2020

Semicond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Next, electrical contacts have been also widely studied using experimental setups and measurements, employing a combined analytical and experimental investigation [25] to describe the electrical-thermal behavior of electrical contact systems, using a low-cost tabletop indenter setup [26] to measure the in-situ electrical contact resistance, determining experimentally the adhesion force and energy at contact interfaces for conductive, isotropic, and rough surfaces [27]. High current automotive connectors were tested [28] to assess their thermal performance, experimental observations on contact resistance were summed up [29] to be used as an electrical contact guide, two distinct techniques were used during investigations [30] for different pressures, temperatures, and contact types, and trials were conducted [31] on copper/brass plug-and-sockets type of contacts.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Modeling of Mechano–Electro–Thermal Behavior of Electrical Contact Using COMSOL Multiphysics

Andras,

Popescu,

Radu

et al. 2024

Preprint

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Electrical contacts are important circuit components with diverse industrial applications, and their failure can lead to multiple unwanted effects. Hence, the behavior of electrical contacts is a widely studied topic in scientific literature based on various approaches, tools, and techniques. The present study proposes a numerical modeling and simulation approach based on the Holm contact theory to study the dependence between the electric potential and the temperature within an electrical contact. Structured in 5 sections, the research was conducted using COMSOL Multiphysics software and its solid-state mechanics, electric current, and heat transfer modules in order to highlight contact behavior from mechanical, electrical and thermal points of view: the von Mises stress, contact force, the electric field amplitude, the variation of the electrical potential along the current path, the temperature gradient, and dependence of temperature along the contact elements edges were obtained by simulation and graphically represented. The results are in line with the expectations and with past research that was studied in the literature review.

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“…The indentation rolling resistance of spherically profiled idler rolls was studied. Dutta Sudipta [28] designed a table top experimental setup for electrical contact resistance measurement during indentation. Nicola Menga [29] studied the indentation rolling resistance in belt conveyors based on a model for the viscoelastic friction.…”

Section: Introductionmentioning

confidence: 99%

Normal Force and Sag Resistance of Pipe Conveyor

Huang

2020

Chin. J. Mech. Eng.

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Pipe belt conveyor is a new type of environmentally friendly and efficient bulk conveying equipment. In the design of the roller, the belt and the driving motor of pipe belt conveyor, the sag resistance is a key parameter. Meanwhile, the normal force between the conveyor belt and the roller group is the other important factor need be considered and has a great influence on the sag resistance. This paper analyzes a pipe belt conveyor with a diameter of 150 mm to study the calculation method of normal force. And the relationship between the normal force and the sag resistance is explored. Firstly, the normal force is decomposed into three components related to the forming force of belt, material gravity and belt gravity. So it can be expressed as a linear combination of these three quantities, and the coefficients of each component are obtained based on the dynamic analysis of belt-roller. The results show that the coefficient is mainly affected by the material filling rate, and is almost not affected by the distance between the rollers and the density of the material. The calculation method of the normal force is eventually obtained. Secondly, the normal force in the case of different material filling rates is tested by experiments, and the calculation method of the normal force is verified. Thirdly, the variation law of the sag resistance in the case of different roller group spacing and material filling rate is studied by the dynamic model. It is found that the roller group spacing and material filling rate affects the sag resistance by changing the normal force. There is a power function relationship between the sag resistance and the normal force. In the case of different roller group spacing and material filling rate, the relationship among the sag resistance and the normal force remains unchanged. This study results are of great significance to the design of pipe belt conveyor.

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Table top experimental setup for electrical contact resistance measurement during indentation

Cited by 8 publications

References 22 publications

Electrical-mechanical coupling performance of gallium arsenide under nanoindentation

Electrical-mechanical coupling performance of gallium arsenide under nanoindentation

Numerical Simulation and Modeling of Mechano–Electro–Thermal Behavior of Electrical Contact Using COMSOL Multiphysics

Normal Force and Sag Resistance of Pipe Conveyor

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