Smoothed-Particle Hydrodynamics Investigation on Brittle-Ductile Transition of Quartz Glass in Single-Grain Grinding Process

• 作者: Dongming Guo Ming Li Renke Kang Ruifeng Zhai Xiaoguang Guo Xichun Luo Zhuji Jin
• 来源期刊: 纳米制造与计量(英文)
• 学科: 地球科学
• 关键词: Quartz glass Brittle ductile transition Ultra precision grinding Smoothed particle hydrodynamics
• 年，卷（期）: 2020,（4）
• 页码范围: 299-306
• 页数: 8页
• 分类号: P59

摘要

The smoothed-particle hydrodynamics(SPH)method was introduced to simulate the quartz glass grinding process with a single grain under micrp-nano scale.To investigate the mechanism of brittle-ductile transition,such factors as the machin-ing depth,grinding force,maximum equivalent stress,and residual stress were analyzed.The simulation results indicate that quartz glass can be machined in a ductile mode under a certain condition.In this paper,the occurrence and propaga-tion of cracks in quartz glass at different grinding depths(0.1-1μm)are observed,and the critical depth of brittle-ductile transformation is 0.36 pum.At different grinding depths,the grinding force ratio is greater than 1.When the cutting depth is 0.4 um,the crack propagation depth is about 1.2μm,which provides a basis for the prediction of subsurface damage depth.In addition,the correctness of the simulation result was verified by carrying out scratch experiments of varying cutting depth on optical quartz glass.