Analysis of Micromechanical Characteristics of Softness Consolidation Abrasives

JI Shiming;QIU Wenbin;ZENG Xi;XI Fengfei;QIU Lei;ZHENG Qianqian;SHI Meng

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  • Sponsored by: China Association for Science and Technology (CAST)

    Editor-In-Chief: Xu Yida

    ISSN 1000-1093

    　

  • Hosted By: China Ordnance Society

    Published By: Acta Armamentarii

    CN 11-2176/TJ

Acta Armamentarii, a Chinese monthly journal, was first published in 1979. The journal is supervised by China Association for Science and Technology, sponsored by China Ordnance Society，and edited and published by Editorial Board of Acta Armamentarii. The Journal is included in all important domestic databases，and also collected by Engineering Index (EI, USA), Chemical Abstracts (CA, USA), Science Abstracts (SA, UK）, Abstract Journal (AJ, Russia), and Current Bibliography on Science and Technology(CBST).Acta Armamentarii has been selected into the journal Of Ordnance Science and Technology (Weapons Industry) Field Of High Quality Scientific and Technological Periodical Classification Catalogue (2022 edition), ranking T1, and the journal of Automotive Engineering Field of High Quality Scientific and technological Periodical classification Catalogue, ranking T2.
Acta Armamentarii ›› 2019, Vol. 40 ›› Issue (5) : 1068-1076. DOI: 10.3969/j.issn.1000-1093.2019.05.020
Paper

Analysis of Micromechanical Characteristics of Softness Consolidation Abrasives

  • JI Shiming， QIU Wenbin， ZENG Xi， XI Fengfei， QIU Lei， ZHENG Qianqian， SHI Meng
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Abstract

A model of microscopic contact mechanics inside abrasives group is established to analyze the force chain transfer process. The Li-Dafalias elastoplastic dilatant constitutive model is used to reflect the relationship between micro-force and displacement within the abrasives group. The evolution of force chain network of abrasives group with different porosities and the pressure distribution on workpiece surface were simulated using the three-dimensional particle flow code (PFC3D) software. The simulated results show that, when the porosity exceeds 44%, the internal force chain transmission path of abrasives group disappears; the surface pressure of workpiece exhibits a periodic distribution, and the pressure amplitude decreaseswith the increase in porosity. A test platform was set up, and the influence laws of porosity and abrasive mesh on the surface roughness of workpiece can be concluded after a series of polishing experiments by pneumatic grinding wheels with softness consolidation abrasives. The experimental results show that the contour arithmetic mean deviation of workpiece surface roughness is small and decreases from 313.744 nm to 67.11 nm when the abrasive mesh is 800 and the porosity is 24%. Key

Key words

softnessconsolidationabrasivegroup / pneumaticwheel / dilatancyeffect / scratchescontrolling / constitutivemodel / roughness / micromechanicalcharacteristic

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JI Shiming， QIU Wenbin， ZENG Xi， XI Fengfei， QIU Lei， ZHENG Qianqian， SHI Meng. Analysis of Micromechanical Characteristics of Softness Consolidation Abrasives. Acta Armamentarii. 2019, 40(5): 1068-1076 https://doi.org/10.3969/j.issn.1000-1093.2019.05.020

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第40卷第5期
2019年5月兵工学报ACTA
ARMAMENTARIIVol.40No.5May2019

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