Open AccessEffect of Inertial on the Adiabatic Shear Instability: Numerical Analysis
Author(s) -
Jiejian Liu,
Genwei Wang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/740/1/012145
Subject(s) - adiabatic shear band , instability , machining , chip formation , finite element method , materials science , inertial frame of reference , inertia , shear (geology) , adiabatic process , mechanics , mechanical engineering , cutting tool , fictitious force , structural engineering , engineering , tool wear , composite material , physics , classical mechanics , thermodynamics
Adiabatic shear instability, as a common plastic instability model of metal materials, has attracted more and more attention. In the process of metal cutting, adiabatic shear instability is observed in the chip with different cutting speed. The plastic instability of the chip usually has two effects: one is the quality of the machined parts, and the other is the fatigue service life of the machined tool. These two factors are usually determined by the parameters of the tool (front corner, back corner), the processing parameters (cutting thickness and cutting speed) and other conditions. In order to improve the machining efficiency, the main way is to raise the cutting speed under the condition that the tool parameters are fixed. With the continuous increase of cutting speed, the inertial effect will become stronger and stronger. By means of commercial finite element software Abaqus/Explicit, this paper analyzes the variation of metal cutting morphology, the fluctuation law of cutting force, the change trend of average cutting force, and the role of inertia effect in different machining speed ranges.