Mechanics Modeling and Three-Dimensional Finite Element Simulating for High Speed Milling of Titanium Alloy

2010 ◽  
Vol 29-32 ◽  
pp. 360-364
Author(s):  
Yong Yang ◽  
Yu Ling Wang ◽  
Chang He Li
Keyword(s):  
Finite Element ◽  
Titanium Alloy ◽  
Finite Element Model ◽  
High Speed ◽  
Three Dimensional ◽  
Element Model ◽  
Milling Process ◽  
High Speed Milling ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

A three-dimensional finite element model of helix double-edge cutting is developed to study the ending milling process of titanium alloy Ti6Al4V. Several mechanics models of milling process, such as material constitutive model, friction model and heat transfer model, are implemented to improve finite element simulating accuracy. A milling force experiment is carried out, and a good agreement between simulation and experimental value is achieved, which proved that the finite element model presented in this paper is correct. Using this finite element model, chip formation and cutting temperature are simulated and analyzed. This work will be a base for process parameter optimization, tool’s optimization selection and design during high speed milling of difficult-to-cut titanium alloy.

scholarly journals MODELLING FROM THE PAST: THE LEANING SOUTWEST TOWER OF CAERPHILLY CASTLE 1539-2015

2017 ◽  
Vol IV-2/W2 ◽  
pp. 221-227 ◽  
Author(s):  
O. E. C. Prizeman ◽  
V. Sarhosis ◽  
A. M. D’Alri ◽  
C. J. Whitman ◽  
G. Muratore
Keyword(s):  
Finite Element ◽  
Structural Analysis ◽  
Finite Element Model ◽  
Three Dimensional ◽  
Element Model ◽  
Present Condition ◽  
Long Term Stability ◽  
Dimensional Finite Element ◽  
The Uk ◽  
Three Dimensional Finite Element

Caerphilly Castle (1268-70) is the first concentric castle in Britain and the second largest in the UK. The dramatic inclination of its ruinous south west tower has been noted since 1539. Comparing data from historical surveys and a terrestrial laser scan undertaken in 2015, this paper seeks to review evidence for the long-term stability of the tower. Digital documentation and archival research by architects is collated to provide data for structural analysis by engineers. A terrestrial laser scan was used to create a detailed three dimensional finite element model to enable structural analysis of the current shape of the tower made by tetrahedral elements. An automated strategy has been implemented for the transformation of the complex three dimensional point cloud into a three dimensional finite element model. Numerical analysis has been carried out aiming at understanding the main structural weaknesses of the tower in its present condition. Comparisons of four sets of data: 1539, 1830, 1870 and 2015 enabled us to determine change albeit between very different methods of measurement.

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