A third body contact model for particle contaminated electrical contacts

Ghaednia, Hamed; Jackson, Robert L.; Gao, Jinchun

doi:10.1109/holm.2014.7031018

Cited by 14 publications

(8 citation statements)

References 15 publications

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“…Spherical contact models are used by many researchers from different fields such as tribology, mechanical impact [31][32][33][34][35], and electrical contact [11,31,32,[36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54]. Even though the spherical geometry is often used to consider asperity contact, it can also be used to consider the flattening of particles between surfaces, such as in anisotropic conductive films [51] or in the presence of wear particles [55] and nanoparticles [50]. As with the previously discussed case of cylindrical contact, spherical contact can be divided into three regimes: fully elastic, elastic-plastic, and fully plastic [5].…”

Section: Normal Spherical Contactmentioning

confidence: 99%

A Review of Elastic–Plastic Contact Mechanics

Ghaednia

Wang

Saha

et al. 2017

Applied Mechanics Reviews

206

120

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In typical metallic contacts, stresses are very high and result in yielding of the material. Therefore, the study of contacts which include simultaneous elastic and plastic deformation is of critical importance. This work reviews the current state-of-the-art in the modeling of single asperity elastic–plastic contact and, in some instances, makes comparisons to original findings of the authors. Several different geometries are considered, including cylindrical, spherical, sinusoidal or wavy, and axisymmetric sinusoidal. As evidenced by the reviewed literature, it is clear that the average pressure during heavily loaded elastic–plastic contact is not governed by the conventional hardness to yield strength ratio of approximately three, but rather varies according to the boundary conditions and deformed geometry. For spherical contact, the differences between flattening and indentation contacts are also reviewed. In addition, this paper summarizes work on tangentially loaded contacts up to the initiation of sliding. As discussed briefly, the single asperity contact models can be incorporated into existing rough surface contact model frameworks. Depending on the size of a contact, the material properties can also effectively change, and this topic is introduced as well. In the concluding discussion, an argument is made for the value of studying hardening and other failure mechanisms, such as fracture as well as the influence of adhesion on elastic–plastic contact.

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Section: Normal Spherical Contactmentioning

confidence: 99%

A Review of Elastic–Plastic Contact Mechanics

Ghaednia

Wang

Saha

et al. 2017

Applied Mechanics Reviews

206

120

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“…Contact between two rough surfaces can be equivalent to contact between a hemisphere and a rigid flat [11][12][13]. The study of elastic-plastic contact behavior between hemisphere and a rigid flat is of great significance to the analysis of electrical contact [14][15][16][17], friction [18,19], and wear [20,21] between two rough surfaces.…”

Section: Introductionmentioning

confidence: 99%

Research on Elastic–Plastic Contact Behavior of Hemisphere Flattened by a Rigid Flat

et al. 2022

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The contact behavior of a hemisphere pressed by a rigid plane is of great significance to the study of friction, wear, and conduction between two rough surfaces. A flattening contact behavior of an elastic–perfectly plastic hemisphere pressed by a rigid flat is researched by using the finite element method in this paper. This behavior, influenced by different elastic moduli, Poisson’s ratios, and yield strengths, is compared and analyzed in a large range of interference values, which have not been considered by previous models. The boundaries of purely elastic, elastic–plastic, and fully plastic deformation regions are given according to the interference, maximum mean contact pressure, Poisson’s ratio, and elastic modulus to yield strength ratio. Then, a new elastic–plastic constitutive model is proposed to predict the contact area and load in the elastic–plastic range. Compared with previous models and experiments, the rationality of the present model is verified. The study can be applied directly to the contact between a single sphere and a plane. In addition, the sphere contact can also be used to simulate the contact of single asperity on rough surfaces, so the present proposed model can be used to further study the contact characteristics of rough surfaces.

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“…Fundamental to all assembled systems, contact mechanics is integral to mechanical design. This is evident in various material processes and engineering applications, such as hardness measurement [1,2], particle and powder interactions [3,4], particle erosion [5], thermal spray [6][7][8], electrical contact [9][10][11], biomechanics [12][13][14][15] and additive manufacturing [16,17]. Surface curvature or roughness often causes the extremely small contact area, resulting highly local deformation and stress concentrations.…”

Section: Introductionmentioning

confidence: 99%

Unloading Behavior of Elastic-power-law Strain Hardening Materials Indented by Elastic Indenter

Chen¹,

Wang²,

Wang³

et al. 2021

Preprint

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Both strain hardening and indenter elastic deformation usually cannot be neglected in engineering contacts. By the finite element (FE) method, this paper investigates the unloading behavior of elastic-power-law strain-hardening half-space frictionlessly indented by elastic sphere for systematic materials. The effects of strain hardening and indenter elasticity on the unloading curve, cavity profile during unloading and residual indentation are analyzed. The unloading curve is observed to follow a power-law relationship, whose exponent is sensitive to strain hardening but independent upon indenter elastic deformation. Based on the power-law relationship of the unloading curve and the expression of the residual indentation fitted from the FE data, an explicit theoretical unloading law is developed. Its suitability is validated numerically and experimentally by strain hardening materials contacted by elastic indenter or rigid flat.

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A third body contact model for particle contaminated electrical contacts

Cited by 14 publications

References 15 publications

A Review of Elastic–Plastic Contact Mechanics

A Review of Elastic–Plastic Contact Mechanics

Research on Elastic–Plastic Contact Behavior of Hemisphere Flattened by a Rigid Flat

Unloading Behavior of Elastic-power-law Strain Hardening Materials Indented by Elastic Indenter

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