Development of Three-Dimensional Parametric Modeling for Milling Process Simulation

2010 ◽  
Vol 139-141 ◽  
pp. 1178-1183
Author(s):  
Jing Sheng ◽  
Guang Guo Zhang ◽  
Hong Hua Zhang
Keyword(s):  
3D Modeling ◽  
Process Simulation ◽  
Three Dimensional ◽  
Milling Process ◽  
Parametric Modeling ◽  
Machining Simulation ◽  
Metal Machining ◽  
Simulation Results ◽  
Key Techniques ◽  
Access Data

Metal machining simulation using finite element method (FEM) is extraordinarily complex. It is essential to develop a system so as to construct simulation model and obtain valuable results conveniently and rapidly. This study developed a parametric modeling based on MSC.Marc software, which included the key techniques of three-dimensional (3D) modeling and the parametric modeling course of metal milling process. In addition, an explanation facility based on the procedure file, which could be run automatically, was performed according to a modeling procedure. The interface of the system designed using Builder, could access data, which included the geometric angles and the dimensions of a tool and a workpiece, the relative position between them, their properties and cutting conditions, etc.. Calling the procedure file, the system approached the parametric modeling. An example was given, which simulation results indicated that it is an effective methodology to develop 3D parametric modeling.

3D Parametric Modeling of Numerical Simulation on Oblique Cutting

2009 ◽  
Vol 16-19 ◽  
pp. 399-403
Author(s):  
Jing Sheng ◽  
Li Ping Yao
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Metal Cutting ◽  
Parametric Modeling ◽  
Oblique Cutting ◽  
Complex Process ◽  
Element Simulation ◽  
Metal Machining ◽  
Key Techniques ◽  
Access Data

The finite element simulation of metal machining is a complex process. It is essential to develop a system to construct a model of simulation so as to obtain simulation data conveniently and rapidly. The paper detailed the parametric modeling. The key techniques of 3D modeling with MSC.Marc software and the parametric modeling procedure of metal oblique cutting process were presented in the paper. The modeling rule based on the procedure file was investigated. The interface of the system, designed using C++ Builder, could access data, which includes the geometrical angles and dimensions of a tool, the sizes of a workpiece, the relative position between the tool and the workpiece, their properties and cutting conditions, etc.. The procedure file, which is able to model in the MSC.Marc environment, was created by the program automatically. Calling the file, the system can finish the parametrical modeling of the finite element simulation. Then an example was given and the simulation model was also run. It was proved that the parametric modeling is an effective way for metal cutting simulation.

Parametric Modeling Based on Orthogonal Milling Process

2011 ◽  
Vol 55-57 ◽  
pp. 2175-2181
Author(s):  
Jing Sheng
Keyword(s):  
Orthogonal Cutting ◽  
Milling Process ◽  
Parametric Modeling ◽  
Element Analysis ◽  
Modeling Process ◽  
Dimensional Modeling ◽  
Complex Process ◽  
The Finite Element Analysis ◽  
Metal Machining ◽  
Key Techniques

The finite element analysis (FEM) of metal machining is a complex process. It is essential to exploit a system to construct a model of FEM so as to obtain simulation data more conveniently and rapidly. The key techniques of two-dimensional modeling in MSC.Marc software and the whole modeling procedure of metal orthogonal cutting process were presented. The rule based on the modeling process was also investigated. The system’s interface, designed using C++ Builder, can access data which includes the geometrical angles and dimensions of tool, the sizes of work, the relative position between tool and work, properties of tool and work, cutting conditions, etc.. The procedure file which can model in MSC.Marc environment automatically is generated by the program. The parametrical modeling of simulation is completed by the procedure file. Finally, case studies were performed to study the simulation model, interface and simulation.

Recent Progress of Computer Aided Simulation of Chip Flow and Tool Damage in Metal Machining

1996 ◽  
Vol 210 (3) ◽  
pp. 233-242 ◽  
Author(s):  
K Maekawa ◽  
T Shirakashi ◽  
T Obikawa
Keyword(s):  
Three Dimensional ◽  
Machining Simulation ◽  
Virtual Machining ◽  
Chip Flow ◽  
Element Simulation ◽  
Deformation And Fracture ◽  
Computer Aided ◽  
Metal Machining ◽  
Tool Damage ◽  
Further Development

A computer simulation approach to the predictions of chip flow and tool damage in metal machining is reviewed based on the authors' recent work. Not only finite element simulation theory but also material characteristics to be included in the analysis are stressed, since machining phenomena are intimately associated with elastic-plastic deformation and fracture of work materials at high strain rates and high temperatures. Temperature rise in the tool and workpiece should be incorporated in the machining simulation as well. Various simulation results together with some comparisons with experiments are shown, such as two-dimensional continuous and discontinuous chip formation, wear and fracture of a cutting tool and more practical three-dimensional machining. Finally, a new concept of computational machining or virtual machining simulation is envisaged in the light of further development of the present computer aided simulation.

A Improved Design of Mechanical Structure of a Coin-Wrapping Machine Based on Pro/E Software

2013 ◽  
Vol 288 ◽  
pp. 48-53
Author(s):  
Xue Dong Jing ◽  
Ding Wei ◽  
Siwen Kang
Keyword(s):  
3D Modeling ◽  
Three Dimensional ◽  
Integrated Model ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Mechanical Structure ◽  
Modeling Software ◽  
New Type ◽  
Simulation Results ◽  
Improved Design

This paper has designed a new type of mechanical structure for a coin-wrapping machine; It’s three-dimensional model has been established by Pro / E 3D modeling software and the kinematic of the Integrated model analysis has been carried out. The simulation results have shown that the coin wrapping process can be simplified and the efficiency can also be improved with the new structure, thereby reducing the costs.

scholarly journals Accelerated Time and High-Resolution 3D Modeling of the Flow and Dispersion of Noxious Substances over a Gigantic Urban Area—The EMERGENCIES Project

Atmosphere ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 640
Author(s):  
Olivier Oldrini ◽  
Patrick Armand ◽  
Christophe Duchenne ◽  
Sylvie Perdriel ◽  
Maxime Nibart
Keyword(s):  
High Resolution ◽  
Urban Area ◽  
3D Modeling ◽  
Three Dimensional ◽  
Hazardous Materials ◽  
Support Tool ◽  
On Demand ◽  
Simulation Domain ◽  
Dimensional Simulation ◽  
Atmospheric Release

Accidental or malicious releases in the atmosphere are more likely to occur in built-up areas, where flow and dispersion are complex. The EMERGENCIES project aims to demonstrate the operational feasibility of three-dimensional simulation as a support tool for emergency teams and first responders. The simulation domain covers a gigantic urban area around Paris, France, and uses high-resolution metric grids. It relies on the PMSS modeling system to model the flow and dispersion over this gigantic domain and on the Code_Saturne model to simulate both the close vicinity and the inside of several buildings of interest. The accelerated time is achieved through the parallel algorithms of the models. Calculations rely on a two-step approach: the flow is computed in advance using meteorological forecasts, and then on-demand release scenarios are performed. Results obtained with actual meteorological mesoscale data and realistic releases occurring both inside and outside of buildings are presented and discussed. They prove the feasibility of operational use by emergency teams in cases of atmospheric release of hazardous materials.

Design of finite-time guidance law based on observer and head-pursuit theory

2021 ◽  
pp. 095441002098456
Author(s):  
Chenqi Zhu
Keyword(s):  
Finite Time ◽  
Three Dimensional ◽  
Hypersonic Vehicle ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Reaching Law ◽  
Guidance Law ◽  
Fast Power ◽  
Simulation Results ◽  
Guidance Laws

In order to improve the guiding accuracy in intercepting the hypersonic vehicle, this article presents a finite-time guidance law based on the observer and head-pursuit theory. First, based on a two-dimensional model between the interceptor and target, this study applies the fast power reaching law to head-pursuit guidance law so that it can alleviate the chattering phenomenon and ensure the convergence speed. Second, target maneuvers are considered as system disturbances, and the head-pursuit guidance law based on an observer is proposed. Furthermore, this method is extended to a three-dimensional case. Finally, comparative simulation results further verify the superiority of the guidance laws designed in this article.

Study on Crankshaft Design Based on CAD/CAE

2011 ◽  
Vol 201-203 ◽  
pp. 830-835
Author(s):  
Chang Gao Xia ◽  
Jian Kuan Su ◽  
Mao Hui Pan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Parametric Modeling ◽  
Analysis Procedure ◽  
Secondary Development ◽  
Design Quality ◽  
Element Analysis ◽  
Integrated Method ◽  
Engine Crankshaft

This paper presents an integrated method, which is based on the CAD/CAE, for engine crankshaft design. A parametric modeling system of engine crankshaft is established with the CATIA secondary development tools. Taking advantage of the finite element analysis procedure of engine crankshaft strength which is programmed with ANSYS APDL programming language, the parametric loading, automatic solution and result analysis of the crankshaft strength can be realized. Integrating the parametric modeling system of engine crankshaft and the special finite element analysis procedure of the engine crankshaft strength, the three-dimensional digital model of the crankshaft can be generated rapidly. By changing the structure dimension, the crankshaft series design is achieved and the design and analysis can be improved. Therefore, it is helpful to improve the design quality and efficiency of crankshaft and shorten the design cycle.

Direct simulation of evolution and control of three-dimensional instabilities in attachment-line boundary layers

1995 ◽  
Vol 291 ◽  
pp. 369-392 ◽  
Author(s):  
Ronald D. Joslin
Keyword(s):  
Boundary Layer ◽  
Stokes Equations ◽  
Three Dimensional ◽  
Plate Boundary ◽  
Navier Stokes ◽  
Two Dimensional ◽  
Computationally Efficient ◽  
Simulation Results ◽  
Dimensional Simulation ◽  
Attachment Line

The spatial evolution of three-dimensional disturbances in an attachment-line boundary layer is computed by direct numerical simulation of the unsteady, incompressible Navier–Stokes equations. Disturbances are introduced into the boundary layer by harmonic sources that involve unsteady suction and blowing through the wall. Various harmonic-source generators are implemented on or near the attachment line, and the disturbance evolutions are compared. Previous two-dimensional simulation results and nonparallel theory are compared with the present results. The three-dimensional simulation results for disturbances with quasi-two-dimensional features indicate growth rates of only a few percent larger than pure two-dimensional results; however, the results are close enough to enable the use of the more computationally efficient, two-dimensional approach. However, true three-dimensional disturbances are more likely in practice and are more stable than two-dimensional disturbances. Disturbances generated off (but near) the attachment line spread both away from and toward the attachment line as they evolve. The evolution pattern is comparable to wave packets in flat-plate boundary-layer flows. Suction stabilizes the quasi-two-dimensional attachment-line instabilities, and blowing destabilizes these instabilities; these results qualitatively agree with the theory. Furthermore, suction stabilizes the disturbances that develop off the attachment line. Clearly, disturbances that are generated near the attachment line can supply energy to attachment-line instabilities, but suction can be used to stabilize these instabilities.

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