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| Thermo-plastic shear wave induced adiabatic shear banding in high speed machining |
| Received:March 30, 2012 Revised:June 23, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201302016 |
| KeyWord:high speed machining adiabatic shear instability thermo-plastic shear wave serrated chip shear bandwidth |
| Author | Institution |
| 谷丽瑶 |
大连理工大学 精密和特种加工教育部重点实验室,大连 |
| 王敏杰 |
大连理工大学 精密和特种加工教育部重点实验室,大连 |
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| Abstract: |
| The propagation mechanism of thermo-plastic shear wave induced adiabatic shear banding in high speed machining was presented theoretically.Considering plastic gradient deformation characteristics,momentum and energy dissipations in thermo-plastic region of serrated chip with adiabatic shear band,the propagation model of thermo-plastic shear wave and the corresponding shear bandwidth model were established.On this basis,through high speed cutting experiment of hardened 45 steel and its modified Johnson-Cook constitutive model,the propagation laws of thermo-plastic shear wave were investigated and the shear bandwidth model was compared with other purposed shear bandwidth models,such as DB model,WR model and DM model.The results indicate that the shear bandwidth model deduced from the propagation theory of thermo-plastic shear wave is more accordant with the experimental results than the other shear bandwidth models. |