Finite Element Simulation and Experimental Investigations to Predict Tool Flank Wear Rate During Microturning of Ti–6Al–4V Alloy

2019 ◽  
pp. 489-498
Author(s):  
Jiju V. Elias ◽  
S. Asams ◽  
Jose Mathew
Keyword(s):  
Finite Element ◽  
Wear Rate ◽  
Finite Element Simulation ◽  
Flank Wear ◽  
Experimental Investigations ◽  
Tool Flank Wear ◽  
Element Simulation

Finite Element Simulation of Residual Stress on the Surface in the Cutting Considering Tool Flank Wear

2010 ◽  
Vol 431-432 ◽  
pp. 338-341
Author(s):  
Hai Tao Liu ◽  
Ya Zhou Sun ◽  
Ze Sheng Lu
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Flank Wear ◽  
Great Influence ◽  
Machining Accuracy ◽  
Surface Residual Stress ◽  
Machined Surface ◽  
Tool Flank Wear ◽  
Element Simulation

Deformation caused by residual stress has been one of the main reasons influencing the machining accuracy, studies on machining residual stress should be performed. The tool flank wear on the cutting process has great influence on cutting heat which will infulence the distribution of residual stress, therefore,we should do the finite element simulation of cutting tool flank wear on the heat-affected firstly,then simulate and forecast the surface residual stress, studies on the effect of tool flank wear on the distribution of machined surface residual stress Johnson-Cook’s coupled thermal-mechanical model is used as workpiece material model, thermal-displacement coupled brick are used to mesh, while friction between tool and work piece uses modified Coulomb's law whose slide friction area is combined with sticking friction. By means of FEA, residual stress on the machined surface and cutting temperature under different tool flank wear conditions are obtained. The results are compared and analyzed, and then we can get the fundamental influencing law on machined surface residual stress of tool flank wear.

scholarly journals Effect of the Supports’ Positions on the Vibration Characteristics of a Flexible Rotor Shafting

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Miaomiao Li ◽  
Zhuo Li ◽  
Liangliang Ma ◽  
Rupeng Zhu ◽  
Xizhi Ma
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Vibration Characteristics ◽  
Rotor System ◽  
Experimental Investigations ◽  
Flexible Rotor ◽  
Bending Vibration ◽  
First Order ◽  
Element Simulation

In this study, we evaluated the effect of changing supports’ position on the vibration characteristics of a three-support flexible rotor shafting. This dependency was first analyzed using a finite element simulation and then backed up with experimental investigations. By computing a simplified rotor shafting model, we found that the first-order bending vibration in a forward whirl mode is the most relevant deforming mode. Hence, the effect of the supports’ positions on this vibration was intensively investigated using simulations and verified experimentally with a house-made shafting rotor system. The results demonstrated that the interaction between different supports can influence the overall vibration deformation and that the position of the support closer to the rotor has the greatest influence.

Springback Analysis of Sheet Metals Regarding Material Hardening

2005 ◽  
Vol 6-8 ◽  
pp. 721-728 ◽  
Author(s):  
Marco Schikorra ◽  
R. Govindarajan ◽  
Alexander Brosius ◽  
Matthias Kleiner
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Dimensional Accuracy ◽  
Material Behavior ◽  
Experimental Investigations ◽  
Sheet Metals ◽  
Forming Process ◽  
Element Simulation ◽  
Strain Reversal ◽  
Draw Bending

The phenomenon of springback of thin-walled sheet metal parts after forming is a well known problem of forming technology in general, but particularly since the finite element simulation offers the opportunity to predict geometrical and material properties after forming. Irrespective of the intensive efforts in the previous years, a reliable and accurate prediction of springback deviations by use of the finite element simulation is still not possible. This paper deals with the numerical and experimental analysis of the springback effect itself, which dependents on the final stress states of a part after the forming process. Experimental investigations have been carried out to analyze geometrical accuracy in loaded and unloaded conditions to isolate the springback effect. Additional finite element simulations have been conducted in order to compare the experimental and numerical results and to determine the geometrical differences and their reasons. Two experimental set-ups are being discussed: Air bending on the one hand, which offers good access to the specimen in the testing equipment, and draw bending on the other hand, which is characterized by a simple strain state, but also by strain reversal within the tests. Both experiments were carried out using DP600 and X5CrNi18.10 with three different sheet thicknesses and bend radii and were compared with according FE-models. An additional shear test experiment has been developed to characterize the material behavior of the tested sheet metals for strain reversal. Furthermore, the importance of the Bauschinger effect and usable hardening models were analyzed. This study intended to investigate reasons for insufficient form and dimensional accuracy between simulations and experiments after springback and to propose modeling methods to improve the accuracy.

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