scholarly journals Fast Point and Element Search Method in Adaptive Remeshing Procedure and Its Applications

2011 ◽  
Vol 2011 ◽  
pp. 1-13 ◽  
Author(s):  
Jie Zhang ◽  
Abel Cherouat ◽  
Houman Borouchaki
Keyword(s):  
Finite Element ◽  
Density Distribution ◽  
Orthogonal Cutting ◽  
Milling Process ◽  
Search Method ◽  
Local Region ◽  
Three Dimension ◽  
Point Location ◽  
Adaptive Remeshing ◽  
Finite Element Numerical Simulation

The FPES (fast point and element search) method is a useful and efficient strategy for node field transfer from old mesh to the new mesh in adaptive remeshing procedure. The FE mesh after adaptive remeshing with various error estimates will be refined at local region, and the mesh after adaptive remeshing has the heterogeneous density distribution. The FPES has the capacity to define the nearest search path adapting to the mesh with heterogeneous density distribution. It is a point location process which includes point searching, point location in element, and weight factor distribution. This strategy has been integrated to our finite element adaptive remeshing simulations, and it works well and rapidly. The three-dimension finite element numerical simulation of simply tensile test, orthogonal cutting, and metal milling process is given out to study its accuracy and efficiency.

Residual Stresses Modelling of End Milling Process Using Numerical and Experimental Methods

2020 ◽  
Vol 978 ◽  
pp. 106-113
Author(s):  
Marimuthu K. Prakash ◽  
Kumar C.S. Chethan ◽  
Prasada H.P. Thirtha
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
End Milling ◽  
Orthogonal Cutting ◽  
Milling Process ◽  
Parent Material ◽  
Machining Processes ◽  
Element Analysis ◽  
1045 Steel ◽  
Cutting Model

Machining has been one of the most sort of process for realizing different products. It has significant role in the value additions process. Machining is one of the production process where material is removed from the parent material to realize the final part or component. Among machining, the well known machining processes are turning, milling, shaping, grinding and non-conventional machining processes like electric discharge machining, ultrasonic machining, chemical machining etc. The fundamental of all these processes being material removal in the form of chips using a tool either in contact or not in contact. In the present work, milling is being taken for study Finite element analysis is being used as a tool to understand the different phenomenon that underlies the machining processes. Of late, the machining induced residual stresses is of great interest to the researchers since the residual stresses have an impact on the functional performances. The present work is to model the milling process to predict the forces and residual stresses using finite element method. Unlike many researchers, the authors have attempted to develop oblique cutting model rather than an orthogonal cutting model. The present work was carried out on AISI 1045 steel.

The Finite Element Simulation of Milling Based on Orthogonal Cutting Model

2012 ◽  
Vol 499 ◽  
pp. 208-212
Author(s):  
Ai Hua Gao ◽  
Fu Rong Wang ◽  
Jian Xin Zhang
Keyword(s):  
Finite Element ◽  
Service Life ◽  
Finite Element Simulation ◽  
Metal Cutting ◽  
Orthogonal Cutting ◽  
Milling Process ◽  
Machining Process ◽  
Element Simulation ◽  
Basic Parameters ◽  
Cutting Model

The paper make the service life of relieving formed milling cutter as the optimization objective, proceed the simulation study on the mechanical degree of cutter, cutting data. The concrete method is that the orthogonal milling model is established to simulate the simulation milling process, some basic parameters which are obtained in the machining process are analyzed and discussed. The results indicate that the finite element simulation of the metal cutting processing can analyze quantitatively some physical properties, such as the cutting force, stress, strain and so on, the traditional way of qualitative analysis is changed. The state of machining is in favour of grasping in the theory, the theory and technology are provided to establish the proper processing technology strategy.

Machinability of ZTC4 Titanium Alloy Analysis Using Finite Element Simulation and Milling Experiment

2011 ◽  
Vol 474-476 ◽  
pp. 633-638 ◽  
Author(s):  
Chang Yi Liu ◽  
Zhi An Tang ◽  
Sheng Yang ◽  
Wen Wen Liu ◽  
Yuan Dong Lu
Keyword(s):  
Finite Element ◽  
Titanium Alloy ◽  
Fem Simulation ◽  
Milling Process ◽  
Machining Process ◽  
Three Dimension ◽  
3D Fem ◽  
Chip Flow ◽  
Clearance Face ◽  
Elastic And Plastic Deformation

In this paper Finite element methods (FEM) and cutting experiment were used to investigate the machinability of titanium alloy ZTC4 (cast Ti6Al4V). Machinability was evaluated as cutting force, temperature, and surface roughness. Two-dimension (2D) and three-dimension (3D) machining process FEM models were established. Material constitutive applied Johnson-Cook model synthesizing elastic and plastic deformation. Chip separated criteria adopted arbitrary Lagrangian Euler (ALE) algorithm. Heat generation source included the rake face chip flow under conditions of seizure and chip/tool friction, clearance face tool/workpiece friction. 3D discrete milling tool was modeled and the milling process was simulated. The ZTC4 milling experiments were designed and carried out with same cutting conditions of the 3D FEM simulation. The results of FEM simulation and the experiment were compared and analysed. The influences of the machining variables to the machinability of ZTC4 were discussed.

Temperature Field Correlation With Surface Integrity in Hard Milling

2011 ◽  
Author(s):  
H. M. Singh ◽  
Y. B. Guo
Keyword(s):  
Finite Element ◽  
Surface Integrity ◽  
Orthogonal Cutting ◽  
Cutting Speed ◽  
Milling Process ◽  
Temperature Deformation ◽  
Hard Milling ◽  
Workpiece Interaction ◽  
Cutting Model ◽  
Insight Into

Experimental and FEA study is conducted to get an insight into critical mechanisms of temperature, deformation, stress generation and variations with cutting speed and tool wear in hard milling AISI H13 steel (50±1 HRC). The critical issues like energy consumption during milling and the resulting surface integrity of the machined component depend on the tool and workpiece interaction. An insight into tool and workpiece interaction is needed in order to design a better milling process for required surface integrity. 2D finite element simulation of orthogonal cutting model is performed to investigate the variations of temperatures and residual stresses at different cutting speeds and tool wears. Hard milling experiments are conducted to correlate with the simulation results. The fact that in hard milling, the temperature does not penetrate deep into the workpiece and there is no clear evidence of heat affected zone such as white layer is demonstrated. With the finite element simulations and experiments, the capability of hard milling process to achieve better surface integrity on the machined surface is explored.

Hot Compression Simulation of Ti75 Alloy Based on DEFORM-3D

2012 ◽  
Vol 229-231 ◽  
pp. 55-58
Author(s):  
Jun Fan
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Simulation Method ◽  
Hot Compression ◽  
Strain Rates ◽  
Know How ◽  
Numerical Simulation Method ◽  
Control Objective ◽  
Finite Element Numerical Simulation ◽  
Deform 3D

To obtain the know-how of the deficiency for the filling capability, taking Ti75 alloy as the research object, at the same height of reducing, strain rates during forming as the control objective, the finite element numerical simulation method was used to simulate the hot compression with DEFORM-3D, analyzing the effect of the strain rates on the distribution of strain and stress.

Study on Load Stress of Lean Concrete Base in Asphalt Pavement

2012 ◽  
Vol 178-181 ◽  
pp. 1495-1498
Author(s):  
Li Jun Suo
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Asphalt Pavement ◽  
Element Model ◽  
Pavement Design ◽  
The Other ◽  
Three Dimension ◽  
Traffic Loading ◽  
Concrete Base

Load stress, which is caused by traffic loading, is important parameter used in the analysis of the new pavement design. In order to study the load stress of lean concrete base in the asphalt pavement, first of all, three–dimension finite element model of the asphalt pavement is established. The main objectives of the paper are investigated. One is calculation for load stress of lean concrete base, and the other is analysis for relationship between load stress of lean concrete base and parameters, such as thickness, modulus. The results show that load stress of lean concrete base decreases, decreases and increases with increase of base’s thickness, surface’s thickness and ratio of base’s modulus to foundation’s modulus respectively. So far as the traffic axle loading is concerned, it has a significant impact on load stress of lean concrete base, and it can be seen from results that when load is taken from 100kN to 220kN, load stress increases quickly with the increase of the traffic axle loading.

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