Study on Deformation of Thin-Walled Workpieces Milling Machining Based on Finite Element Method

2014 ◽  
Vol 644-650 ◽  
pp. 4971-4975
Author(s):  
Ji Qun Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Thin Plate ◽  
Simulation Analysis ◽  
Geometric Model ◽  
Mode Selection ◽  
Machining Process ◽  
Machining Accuracy ◽  
Finite Element Numerical Simulation ◽  
Thin Walled

In the mechanical products, there are always some poor stiffness and high precision thin-walled workpieces which will produce deformation in the machining process easily, so it is difficult to control the machining accuracy and to meet the requirement of higher machining accuracy. Based the finite element numerical simulation key technology, this paper analyzes the machining deformation, including geometric model simplification, mode selection, dynamic loading, a 3D simulation model of thin plate features establishment. Through the finite element numerical simulation analysis of the thin plate, we analyze the influence on processing deformation from different processing parameters and different constraints.

Optimal Clamping Scheme of Thin-Walled Cavity Workpiece

2011 ◽  
Vol 189-193 ◽  
pp. 2116-2120
Author(s):  
Shi Min Geng ◽  
Jun Wang
Keyword(s):  
Finite Element ◽  
Aluminum Alloy ◽  
Machining Process ◽  
Machining Accuracy ◽  
Finite Element Models ◽  
Thin Walled ◽  
Clamping Sequence

The thin-walled cavity workpiece with insufficient rigid property is liable to deform during the machining process and the request of accuracy is very strict. The paper takes typical aeronautic aluminum-alloy for example, fixture is an important consideration in the operation. To reveal the influences of locating points, clamping sequence and loading ways on the distortion of thin-walled cavity part, finite element models were established to simulate the clamping operation. The result shows the preferable scheme is that the distance of the clamping locations are far each other, clamping forces are firstly applied on the surface with high rigid and all clamping forces are applied in many steps. The scheme can effectively control the deformation of clamp ,and furthermore improve the machining accuracy.

Monitoring Measurement of Vehicular Tunnels and Finite Element Numerical Simulation Analysis

2012 ◽  
Vol 204-208 ◽  
pp. 2832-2836
Author(s):  
Lei Chen ◽  
Lei Wang ◽  
Lin Zhang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Comparative Analysis ◽  
Linear Regression ◽  
Simulation Analysis ◽  
Field Monitoring ◽  
Monitoring Data ◽  
Finite Element Numerical Simulation ◽  
Simulation Results

The vault settlement, the horizontal convergence of Fangdoushan tunnel are monitored and measured. The changing curves with time are drawn; while the data of convergence measurement is analyzed with linear regression. The whole constructing process is simulated to analyze based on FLAC3D. The results of comparative analysis of the data from field monitoring and the data from numerical simulation shows that the simulation results accord well with the actual monitoring data, which will furthermore optimize both the design and the scientific construction

Finite Element Numerical Simulation Analysis on Deformation of Adjacent Building with Shallow Foundation due to Excavation

2013 ◽  
Vol 353-356 ◽  
pp. 403-406
Author(s):  
Yong Kang Yang ◽  
Xiao Yuan Li ◽  
Wu Yang ◽  
Chun Yan Feng
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Simulation Analysis ◽  
Horizontal Displacement ◽  
Element Model ◽  
Vertical Displacement ◽  
Shallow Foundation ◽  
Foundation Pit ◽  
Adjacent Building ◽  
Finite Element Numerical Simulation

Based on deformation of adjacent building with shallow foundation of foundation pit excavation, Midas GTS is adopted to establish the finite element model. Through the numerical simulation, the maximum horizontal and vertical displacement in different conditions, Influence of different SMW pile stiffness and influence of different anchor position are analyzed. The results show that (1) horizontal deformation of SMW pile is decreased at the anchor construction; (2) compared with maximum horizontal displacement of SMW pile with 25a25b28a, the maximum horizontal displacement of SMW pile with 28b is increased by 50.9, 43.3, 11.5% respectively; (3) compared with the second anchor at 1.5, 3.5m, the horizontal displacement of adjacent building is minimal by the second anchor at 2.5m.

Numerical Simulation on the Flow Field in Melt Pump

2012 ◽  
Vol 220-223 ◽  
pp. 1719-1722
Author(s):  
Jin Song Wen ◽  
Xi Ling Zhou
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Flow Field ◽  
Pressure Field ◽  
Simulation Analysis ◽  
Distribution Characteristics ◽  
Inflow Rate ◽  
Molding Process ◽  
3D Finite Element ◽  
Finite Element Numerical Simulation

In this paper, 3D finite element numerical simulation was used on the flow in the XXXX melt pump with POLYFLOW. By numerical simulation analysis on the flow field in the melt pump, distribution characteristics of pressure, flow velocity vectors and shear rate in the melt pump were obtained. Finally, the effects of inflow rate on the pressure difference between the exit and the entrance of the melt pump were investigated by analyzing the pressure field of the melt pump, which could be used to guide the design of melt pump and the plastics molding process.

Numerical Simulation Analysis on Shear Bearing Capacity Experiments of Cold-Formed Steel Self-Drilling Screws Connection

2012 ◽  
Vol 166-169 ◽  
pp. 200-206
Author(s):  
Lin Feng Lu ◽  
Guang Yin Huang ◽  
Wen Qi Fang ◽  
Dong Hua Yang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Contact Problem ◽  
Bearing Capacity ◽  
Large Deformation ◽  
Simulation Analysis ◽  
Simulation Method ◽  
Shear Bearing Capacity ◽  
Cold Formed Steel ◽  
Finite Element Numerical Simulation

Cold-formed steel self-drilling screws connection are imitated to carry out numerical simulation analysis, in which geometric large deformation, materials nonlinear and contact problem are taken into account. From the comparison of computer analysis with experimental results, it comes out that the finite element numerical simulation method is accurate and feasible.

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.

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