Smoothed-particle hydrodynamics investigation on brittle–ductile transition of quartz glass in single-grain grinding process

Xiaoguang Guo, Ming Li, Xichun Luo, Ruifeng Zhai, Renke Kang, Zhuji Jin, Dongming Guo

Research output: Contribution to journalArticlepeer-review

Abstract

The smoothed-particle hydrodynamics (SPH) method was introduced to simulate the quartz glass grinding process with a single grain under micro-nano scale. To investigate the mechanism of brittle–ductile transition, such factors as the machining 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 propagation of cracks in quartz glass at different grinding depths (0.1–1 μm) are observed, and the critical depth of brittle–ductile transformation is 0.36 μm. At different grinding depths, the grinding force ratio is greater than 1. When the cutting depth is 0.4 μm, the crack propagation depth is about 1.2 μm, 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.

Original languageEnglish
Pages (from-to)299-306
Number of pages8
JournalNanomanufacturing and Metrology
Volume3
Early online date25 Sep 2020
DOIs
Publication statusPublished - 31 Dec 2020

Keywords

  • brittle–ductile transition
  • quartz glass
  • smoothed-particle hydrodynamics
  • ultra-precision grinding

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