Prediction of Adiabatic Shear Localization Fracture in High Speed Machining

doi:10.3901/JME.2016.05.186

Abstract

Abstract: Based on the theory of adiabatic shear saturation limit, combining with the deformation and loading conditions of adiabatic shear band (ASB) in serrated chip and dynamic constitutive relation, the prediction model of adiabatic shear localization fracture with variables of cutting speed, cutting depth and rake angle is established. The critical cutting condition of ASLF of hardened 45 steel is predicted and verified through high speed cutting experiment and metallography experiment. The influence of cutting conditions on adiabatic shear localization fracture and the corresponding sensibility are discussed. The results show that large cutting depth and small rake angle can reduce the critical cutting speed of adiabatic shear localization fracture. The critical cutting condition of adiabatic shear localization fracture in chip can be predicted effectively through adiabatic shear localization fracture prediction model.

Key words: adiabatic shear, fracture, high speed machining, prediction, serrated chip

CLC Number:

TG501

GU Liyao, WANG Minjie. Prediction of Adiabatic Shear Localization Fracture in High Speed Machining[J]. Journal of Mechanical Engineering, 2016, 52(5): 185-192.

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