Suppression of Hopf bifurcation in metal cutting by extrusion machining
文献类型：期刊论文
| 作者 | Liu Y; Cai SL ; Shang XC; Dai LH(戴兰宏)
|
| 刊名 | NONLINEAR DYNAMICS
 |
| 出版日期 | 2017-04-01 |
| 卷号 | 88期号:1页码:433-453 |
| 关键词 | Hopf bifurcation Metal cutting Bifurcation suppression Nonlinear dynamic model |
| ISSN号 | 0924-090X |
| 中文摘要 | Hopf bifurcation is a common phenomenon during the metal cutting process which results in poor surface finish of the workpiece and inhomogeneous grain structure in materials. Therefore understanding and controlling Hopf bifurcation in metal cutting are necessary. In this work the systematic low-speed extrusion machining experiments were conducted to suppress Hopf bifurcation phenomenon. It is found that the suppression of Hopf bifurcation is achieved with the increasing constraint extrusion degree. In order to reveal the mechanism of the suppression of Hopf bifurcation a new nonlinear dynamic model for extrusion machining is developed where the convection the diffusion the extrusion of constraint the thermal-softening deformation and the fracture-type damage are included. The theoretical predictions are in agreement with the experimental results; therefore the present theoretical model is effective to characterize the suppression of Hopf bifurcation in metal cutting. Based on the numerical calculation of the theoretical model the mechanisms underlying in extrusion machining are further revealed: Fracture-type deformation is more important than the thermal-softening-type deformation in low-speed extrusion machining; however the thermal-softening-type deformation is the primary deformation mode for high-speed extrusion machining. |
| 类目[WOS] | Engineering, Mechanical ; Mechanics |
| 研究领域[WOS] | Engineering ; Mechanics |
| 关键词[WOS] | CHIP FORMATION ; SHEAR-BAND ; NONLINEAR DYNAMICS ; SPEED ; FLOW ; INSTABILITY ; TI-6AL-4V ; EVOLUTION ; TITANIUM ; SYSTEMS |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000397829200026 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/60569]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Liu Y,Cai SL,Shang XC,et al. Suppression of Hopf bifurcation in metal cutting by extrusion machining[J]. NONLINEAR DYNAMICS,2017,88(1):433-453. |
| APA | Liu Y,Cai SL,Shang XC,&戴兰宏.(2017).Suppression of Hopf bifurcation in metal cutting by extrusion machining.NONLINEAR DYNAMICS,88(1),433-453. |
| MLA | Liu Y,et al."Suppression of Hopf bifurcation in metal cutting by extrusion machining".NONLINEAR DYNAMICS 88.1(2017):433-453. |
入库方式： OAI收割
来源：力学研究所
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