A study on material dynamic plastic constitutive relationship considering hardness

Adiabatic shear fracture in serrated chip leads to isolated segment formation in high-speed machining with the further increase of cutting speed. An energy model of adiabatic shear band is built and investigated through highspeed machining tests and chip morphology examination. A quick-stop device designed to obtain chip roots in high-speed turning is applied. The adiabatic shear fracture process on considering the induced mechanism is investigated and the multi-stage physical model of adiabatic shear fracture is proposed through chip root morphology examination. The results show that adiabatic shear fracture in high-speed machining is a periodic process from energy convergence to release. The shear band collapses and results in isolated segments formation when the energy convergence in band exceeds the saturation limit. There are possibilities of utilizing the occurrence of adiabatic shear fracture to reduce the increased rate of stress, temperature, and energy and optimize the machinability in the chip formation aspect in high-speed machining.

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“…According to the work of Feng et al [16], the modified Johnson-Cook conservative relation of the hardened steel is…”

Section: Modelmentioning

confidence: 99%

Experimental study on the process of adiabatic shear fracture in isolated segment formation in high-speed machining of hardened steel

Wang

Chen

et al. 2015

Int J Adv Manuf Technol

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Simulation and Analysis of Ball-End Milling of Panel Moulds Based on Deform 3D

Yang¹,

Zheng²

2017

Int. j. simul. model.

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Automobile panel moulds are assembled pieces with various surface features, making it difficult to predict the machining properties in ball-end milling process. In this paper, Deform 3D finite element analysis software is used to simulate the ball-end milling of multi-hardness assembled moulds, and to analyse the distribution patterns of milling forces, stress fields and temperature fields in the transition regions of the multi-hardness assembled moulds. Subsequently, milling of sine surface moulds is simulated, and the effects of milling parameters on the thermal performance of sine surfaces are analysed. Finally, the multi-hardness assembling and milling experiment and the sine surface mould milling experiments are conducted to verify the effectiveness of the Deform 3D finite element simulation method.

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A study on material dynamic plastic constitutive relationship considering hardness

Cited by 2 publications

References 9 publications

Experimental study on the process of adiabatic shear fracture in isolated segment formation in high-speed machining of hardened steel

Experimental study on the process of adiabatic shear fracture in isolated segment formation in high-speed machining of hardened steel

Simulation and Analysis of Ball-End Milling of Panel Moulds Based on Deform 3D

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