Finite element modelling of shear angle and cutting force variation induced by material anisotropy in ultra-precision diamond turning

2013 ◽  
Vol 75 ◽  
pp. 82-86 ◽  
Author(s):  
W.B. Lee ◽  
H. Wang ◽  
C.Y. Chan ◽  
S. To
Keyword(s):  
Finite Element ◽  
Cutting Force ◽  
Finite Element Modelling ◽  
Shear Angle ◽  
Diamond Turning ◽  
Material Anisotropy ◽  
Element Modelling ◽  
Ultra Precision ◽  
Force Variation

scholarly journals Finite element modelling of cutting force components in face milling

2020 ◽  
Vol 10 (1) ◽  
pp. 119-128
Author(s):  
Csaba Felhő
Keyword(s):  
Finite Element ◽  
Cutting Force ◽  
Finite Element Modelling ◽  
Measurement Data ◽  
Face Milling ◽  
Third Wave ◽  
Element Modelling ◽  
Cutting Force Components ◽  
Force Components ◽  
Cutting Processes

This paper presents a study about the Finite Element Modelling of cutting force components acting on the workpiece (Fx, Fy, Fz) in face milling. The values of the three force components were simulated by the FEM software AdvantEdge by Third Wave Systems. This program is uniquely intended for modelling of cutting processes. The simulated cutting force values were compared with real measurement data, and a good correlation was between them.

A Microplasticity Analysis of Micro-Cutting Force Variation in Ultra-Precision Diamond Turning

2002 ◽  
Vol 124 (2) ◽  
pp. 170-177 ◽  
Author(s):  
W. B. Lee ◽  
C. F. Cheung ◽  
S. To
Keyword(s):  
Cutting Force ◽  
Crystallographic Orientation ◽  
Cutting Planes ◽  
Diamond Turning ◽  
Micro Cutting ◽  
Crystalline Materials ◽  
Analysis Technique ◽  
Ultra Precision ◽  
Force Variation ◽  
Cutting Experiments

This paper describes a microplasticity model for analyzing the variation of cutting force in ultra-precision diamond turning. The model takes into account the effect of material anisotropy due to the changing crystallographic orientation of workpieces being cut. A spectrum analysis technique is deployed to extract the features of the cutting force patterns. The model has been verified through a series of cutting experiments conducted on aluminum single crystals with different crystallographic cutting planes. The results indicate that the model can predict well the patterns of the cutting force variation. It is also found that there exists a fundamental cyclic frequency of variation of cutting force per revolution of the workpiece. Such a frequency is shown to be closely related to the crystallographic orientation of the materials being cut. The successful development of the microplasticity model provides a quantitative means for explaining periodic fluctuation of micro-cutting force in diamond turning of crystalline materials.

scholarly journals Analysis of Fan Blade Vibration with a Non-Contact Method

2020 ◽  
Vol 50 (1) ◽  
pp. 341-357
Author(s):  
Pierluigi Porco ◽  
Radoslaw Przysowa ◽  
Daniele Botto
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Contact Method ◽  
Material Anisotropy ◽  
Blade Vibration ◽  
Element Modelling ◽  
Blade Tip ◽  
Fan Blade ◽  
Vibration Parameters ◽  
Good Agreement

AbstractComposite fan blades are more and more common both in aviation and ground applications. This work aims to characterize the vibration parameters of plastic blades installed in a wind tunnel fan by a non-contact method, namely blade tip timing (BTT). Blade dynamics was predicted with finite element modelling (FEM) and confirmed experimentally by tip timing measurements and analysis of data. BTT results were acquired and compared in two different configurations. A good agreement between predicted and measured frequency values was obtained for the fundamental mode. Significant differences were observed for the second and third modes due to material anisotropy and contact effects which could not be modelled because necessary material data were unavailable.

Finite Element Modelling of Orthogonal Cryogenic Machining Process

2016 ◽  
Vol 852 ◽  
pp. 248-254
Author(s):  
S. Sriram ◽  
V. Vignesh ◽  
K.S. Vijay Sekar ◽  
Murugasan Pradeep Kumar
Keyword(s):  
Finite Element ◽  
Cutting Force ◽  
Finite Element Modelling ◽  
Thrust Force ◽  
Machining Process ◽  
Maximum Temperature ◽  
Finite Element Models ◽  
Experimental Conditions ◽  
Element Modelling ◽  
Orthogonal Machining

The present work aims in creating the Finite Element Models for the conventional and the Cryogenic Orthogonal machining process. Finite Element Modelling (FEM) of the orthogonal machining operation was performed using DEFORM – 2D which is based on a modified Lagrangian formulation. Finite Element models were developed for various experimental conditions for both conventional and cryogenic orthogonal machining process. The response variables obtained from the models are cutting force, thrust force, temperature, shear stress, strain and strain rate. AISI 1045 steel is used as work material and for tool, tungsten carbide is used under various experimental conditions with the cutting speeds at 100 m/min, 150 m/min, 200 m/min and feeds at 0.07 mm/rev, 0.1 mm/rev, 0.14 mm/rev. A maximum temperature difference of 20.12% is obtained when conventional and cryogenic models were compared at a feed rate of 0.07 mm/rev and cutting speed of 150 m/min. cutting force and thrust force were higher for cryogenic model compared with that of the conventional model. Stress and Strain were distributed as expected to occur in the experiment.

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