A Novel Micro-Contact Stiffness Model for the Grinding Surfaces of Steel Materials Based on Cosine Curve-Shaped Asperities

An, Qi; Suo, Shuangfu; Lin, Fuyan; Jianwen, Shi

doi:10.3390/ma12213561

Cited by 13 publications

(15 citation statements)

References 24 publications

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“…An et al [ 20 ] presented a novel microcontact stiffness model. The model involved the development of rough surfaces through the use of a cosine curve-shaped asperity and the Gauss distribution.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Contact Deformations in Support Systems Using Roller Prisms

2021

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This article presents the results of finite element analyses of the influence of reaction forces on stresses and strains at the contact points of the rollers of prism supports with cylindrical surfaces of the main journals of large-sized crankshafts. The analyses of strains and stresses, as well as the depth of their occurrences, in the case of the shaft journal and support rollers were carried out using Hertz contact theory and the finite element method. These calculation results proved to be highly consistent. Additionally, they provide a basis for stating that, in the case under consideration, permanent deformations do not significantly affect the values of the measured geometrical deviations nor the profile forms of the supported main crankshaft journals.

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Section: Introductionmentioning

confidence: 99%

Analysis of Contact Deformations in Support Systems Using Roller Prisms

2021

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“…The axisymmetric cosinusoidal body provides a more accurate simulation of asperities on a machined surface compared with a hemispherical body (An et al , 2019). Therefore, the axisymmetric cosinusoidal body is chosen as the shape for simulating asperities on a machined surface.…”

Section: Theoretical Formulationsmentioning

confidence: 99%

Fractal model of thermal contact conductance of rough surfaces based on axisymmetric cosinusoidal asperity

Sun,

Xin

2023

COMPEL

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Purpose The purpose of this study is to propose a fractal model of thermal contact conductance of rough surfaces based on axisymmetric cosinusoidal asperity. Design/methodology/approach The effects of contact load, fractal dimension, fractal roughness and friction coefficient on the thermal contact conductance of rough surfaces were investigated in this study. Findings The findings suggest that as the contact load increases, the thermal contact conductance of rough surfaces also increases. In addition, an increase in the fractal dimension corresponds to an increase in the thermal contact conductance. Conversely, an increase in fractal roughness leads to a decrease in thermal contact conductance. The smaller the friction coefficient, the lower the thermal contact conductance of the rough surface. In practical engineering applications, it is possible to achieve the desired thermal contact conductance of rough surfaces by selecting surfaces with appropriate roughness. Originality/value A fractal model of thermal contact conductance of rough surfaces based on axisymmetric cosinusoidal asperity was established in this study. The findings of this study offer a theoretical foundation for investigating the thermal contact conductance of rough surfaces.

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“…Theoretically, to increase the accuracy in the determination of elastic modulus and indentation hardness, the surface of the sample to be tested should be mirror-flat. In practice, however the surfaces of the engineering structures have different degrees of roughness [18][19][20]. Generally, the surface roughness produced by conventional machining ranges from 0.025 μm to 25 μm.…”

Section: Introductionmentioning

confidence: 99%

On determination of elastic modulus and indentation hardness by instrumented spherical indentation: influence of surface roughness and correction method

Peng

Liu

et al. 2023

Mater. Res. Express

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Although, surface roughness can influence the determination of elastic moduli and indentation hardness to some extent by instrumented spherical indentation test, limited work has been done to quantitatively reveal and minimize these influences. In the present work, through a large number of finite element (FE) simulations and analyses, we clarified the evolution trend of determined elastic moduli and indentation hardness corresponding to different normalized indentation depths (h/R) and normalized roughness (Sq/R). On this basis, an area correction method was proposed to improve the measurement accuracy in the elastic moduli and indentation hardness. The FE results show that, with the newly proposed correction method, the maximum relative error in determined elastic moduli is reduced from about ±7% to ±2%, and that in the determined indentation hardness is reduced from about ±13% to ±5%, when Sq/R ≤ 2.2 × 10-3 and h/R = 5%. Applications were then illustrated on four typical metallic materials (i.e., AA 7075, AA 2014, steel 316L, and copper T2). The experimental results demonstrate that the proposed correction method is able to mitigate the effects of surface roughness on the determination of elastic moduli and indentation hardness to obtain more correct results.

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A Novel Micro-Contact Stiffness Model for the Grinding Surfaces of Steel Materials Based on Cosine Curve-Shaped Asperities

Cited by 13 publications

References 24 publications

Analysis of Contact Deformations in Support Systems Using Roller Prisms

Analysis of Contact Deformations in Support Systems Using Roller Prisms

Fractal model of thermal contact conductance of rough surfaces based on axisymmetric cosinusoidal asperity

On determination of elastic modulus and indentation hardness by instrumented spherical indentation: influence of surface roughness and correction method

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