A finite element study on the effects of densification on fused silica under indentation

Li，Changsheng1,3; Zhang，Liangchi2,3; Sun，Lin1; Wu，Chuhan3; Duan，Duanzhi1; Lin，Qijing1; Ding，Jianjun1; Jiang，Zhuangde1

2020-12-01

10.1016/j.ceramint.2020.07.162

CERAMICS INTERNATIONAL   影响因子和分区

0272-8842

1873-3956

The pressure-induced densification significantly affects the deformation and damage behavior of fused silica. This paper presents a finite element analysis (FEA) of the densification and its effects on the deformation in fused silica under indentation. An elliptical constitutive model was refined to consider the influence of densification on elastic properties and its saturation with hydrostatic pressure. By matching the simulated indentation hardness to experiments, the plastic properties of fused silica were more accurately identified. FEA shows that the modified elliptical model can improve the prediction accuracy of the load-displacement curve of Berkovich indentation. As a widely-used reference material, the heavy densification in fused silica dose not influence the calibration accuracy of the tip area function in the Oliver-Pharr method, which provides a theoretical foundation for the use of fused silica as a reference material. With the modified elliptical model, the FEA successfully predicted the geometry of plastic zone, and the extent of elastic recovery and densification, which provided input parameters for the analytical embedded center of dilation (ECD) model of indentation stress field. Results show that the stress fields under a conical indenter predicted by the FEA agreed well with the ECD model.

Densification FEA Fused silica Indentation Stress field

SCI ; EI

英语

通讯

National Science Foundation of China[51720105016] ; Higher Education Discipline Innovation Project, i.e., 111 Project[B12016] ; Discovery-Project of the Australian Research Council[DP190102959] ; State Key Laboratory for Manufacturing Systems Engineering, China[SKLMS2020006]

Materials Science

Materials Science, Ceramics

WOS:000577586400047

ELSEVIER SCI LTD

20203209011575

Elasticity ; Fused silica ; Indentation ; Hydrostatic pressure ; Deformation ; Densification

Liquid Dynamics:631.1.1 ; Chemical Operations:802.3 ; Glass:812.3 ; Numerical Methods:921.6

MATERIALS SCIENCE

2-s2.0-85088987664

Scopus

1.State Key Laboratory for Manufacturing Systems Engineering,School of Mechanical Engineering,Xi'an Jiaotong University,710049,China
2.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.School of Mechanical and Manufacturing Engineering,The University of New South Wales,2052,Australia

Li，Changsheng,Zhang，Liangchi,Sun，Lin,et al. A finite element study on the effects of densification on fused silica under indentation[J]. CERAMICS INTERNATIONAL,2020,46(17):26861-26870.

Li，Changsheng.,Zhang，Liangchi.,Sun，Lin.,Wu，Chuhan.,Duan，Duanzhi.,...&Jiang，Zhuangde.(2020).A finite element study on the effects of densification on fused silica under indentation.CERAMICS INTERNATIONAL,46(17),26861-26870.

Li，Changsheng,et al."A finite element study on the effects of densification on fused silica under indentation".CERAMICS INTERNATIONAL 46.17(2020):26861-26870.