Effect of single grit impacts on initiation and propagation of cracks in ultrasonic assisted grinding of ceramics by using SPH method

Liang，Zhiqiang1; Tian，Meng1; Wang，Qiuyan1; Wang，Xibin1; Zhou，Tianfeng1; Jiao，Li1; Wu，Yongbo2

2018

10.1504/IJNM.2018.095326

International Journal of Nanomanufacturing   影响因子和分区

1746-9392

1746-9406

In order to investigate the material removal mechanism in vertical ultrasonic assisted grinding (VUAG) of ceramics, single-grit impact simulation is performed by using smoothed particle hydrodynamics (SPH) method. The initiation and propagation of cracks in grinding of AlO ceramics are analysed. In this simulation, the grit is modelled as a rectangular pyramid diamond indenter and the process of grit impacting on workpiece under different impact speeds is simulated. The critical depth of initiation and propagation of lateral crack is observed. The results show that within a certain range of impact speed, the critical depth of lateral crack decreases with the increasing of impact speed. This means that the brittle fractures are more prone to occur in VUAG. Considering that the material micro-fracture is the main mode in ceramics material grinding under ordinary processing conditions, the material removal rate in VUAG can be improved. Moreover, by observing the surface topography, it can be found that the surface roughness becomes smaller when the impact speed increases.

ceramics2O3 ceramics Crack Nanomanufacturing Smoothed particle hydrodynamic method SPH UAG Ultrasonic assisted grinding

EI

英语

其他

[2015CB059900] ; [JCKY2016208B001] ; National Natural Science Foundation of China[51205024]

Inderscience Enterprises Ltd.

20184105930039

Alumina ; Aluminum oxide ; Ceramic materials ; Grinding (machining) ; Hydrodynamics ; Surface roughness

Machining Operations:604.2 ; Inorganic Compounds:804.2 ; Ceramics:812.1 ; Physical Properties of Gases, Liquids and Solids:931.2

2-s2.0-85054481438

Scopus

1.,Key Laboratory of Fundamental Science for Advanced Machining,Beijing Institute of Technology,Beijing,5 South Zhongguancun Street, Haidian District,100081,China
2.,Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Nanshan, Shenzhen, Guangdong,1088 Xueyuan Rd.,518055,China

Liang，Zhiqiang,Tian，Meng,Wang，Qiuyan,et al. Effect of single grit impacts on initiation and propagation of cracks in ultrasonic assisted grinding of ceramics by using SPH method[J]. International Journal of Nanomanufacturing,2018,14(4):387-396.

Liang，Zhiqiang.,Tian，Meng.,Wang，Qiuyan.,Wang，Xibin.,Zhou，Tianfeng.,...&Wu，Yongbo.(2018).Effect of single grit impacts on initiation and propagation of cracks in ultrasonic assisted grinding of ceramics by using SPH method.International Journal of Nanomanufacturing,14(4),387-396.

Liang，Zhiqiang,et al."Effect of single grit impacts on initiation and propagation of cracks in ultrasonic assisted grinding of ceramics by using SPH method".International Journal of Nanomanufacturing 14.4(2018):387-396.