An Investigation into the Densification-Affected Deformation and Fracture in Fused Silica under Contact Sliding

Li, Changsheng1,2; Ma, Yushan3; Sun, Lin1; Zhang, Liangchi4,5,6; Wu, Chuhan7; Ding, Jianjun1; Duan, Duanzhi1; Wang, Xuepeng3; Chang, Zhandong3

2022-07-01

10.3390/mi13071106

MICROMACHINES   Impact Factor & Quartile

2072-666X

Subsurface damage of fused silica optics is one of the major factors restricting the performance of optical systems. The densification-affected deformation and fracture in fused silica under a sliding contact are investigated in this study, via three-dimensional finite element analysis (FEA). The finite element models of scratching with 70.3 degrees conical and Berkovich indenters are established. A refined elliptical constitutive model is used to consider the influence of densification. The finite element models are experimentally verified by elastic recovery, and theoretically verified by hardness ratio. Results of densification and plastic deformation distributions indicate that the accuracy of existent sliding stress field models may be improved if the spherical/cylindrical yield region is replaced by an ellipsoid/cylindroid, and the embedding of the yield region is considered. The initiation sequence, and the locations and stages of radial, median, and lateral cracks are discussed by analyzing the predicted sliding stress fields. Median and radial cracks along the sliding direction tend to be the first cracks that emerge in the sliding and unloading stages, respectively. They coalesce to form a big median-radial crack that penetrates through the entire yield region. The fracture behavior of fused silica revealed in this study is essential in the low-damage machining of fused silica optics.

sliding contact fused silica densification finite element analysis cracks

SCI ; EI

English

Others

Fellowship of China National Postdoctoral Program for Innovative Talents[BX20200268] ; National Natural Science Foundation of China[51720105016] ; Research Project of State Key Laboratory of Mechanical System and Vibration in China[MSV202103] ; Key Research and Development Projects of Shaanxi Province in China[2021GXLH-Z-051] ; Guangdong Specific Discipline Project[2020ZDZX2006] ; Shenzhen Key Laboratory of Cross-scale Manufacturing Mechanics Project[ZDSYS20200810171201007]

Chemistry ; Science & Technology - Other Topics ; Instruments & Instrumentation ; Physics

Chemistry, Analytical ; Nanoscience & Nanotechnology ; Instruments & Instrumentation ; Physics, Applied

WOS:000833940600001

MDPI

20223612702067

Densification ; Finite element method ; Fracture ; Fracture mechanics ; Fused silica ; Unloading

Materials Handling Methods:691.2 ; Chemical Operations:802.3 ; Glass:812.3 ; Numerical Methods:921.6 ; Mechanics:931.1 ; Materials Science:951

Web of Science

1.Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China
2.Shanghai Jiao Tong Univ, State Key Lab Mech Syst & Vibrat, Shanghai 200240, Peoples R China
3.Wuzhong Instrument Co Ltd, Wuzhong 751199, Peoples R China
4.Southern Univ Sci & Technol, Shenzhen Key Lab Cross Scale Mfg Mech, Shenzhen 518055, Peoples R China
5.Southern Univ Sci & Technol, SUSTech Inst Mfg Innovat, Shenzhen 518055, Peoples R China
6.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China
7.Univ New South Wales, Sch Mech & Mfg Engn, Sydney, NSW 2052, Australia

Li, Changsheng,Ma, Yushan,Sun, Lin,et al. An Investigation into the Densification-Affected Deformation and Fracture in Fused Silica under Contact Sliding[J]. MICROMACHINES,2022,13(7).

Li, Changsheng.,Ma, Yushan.,Sun, Lin.,Zhang, Liangchi.,Wu, Chuhan.,...&Chang, Zhandong.(2022).An Investigation into the Densification-Affected Deformation and Fracture in Fused Silica under Contact Sliding.MICROMACHINES,13(7).

Li, Changsheng,et al."An Investigation into the Densification-Affected Deformation and Fracture in Fused Silica under Contact Sliding".MICROMACHINES 13.7(2022).