Based on ABAQUS Roll Bending Forming Simulation Numerical Algorithm

2012 ◽  
Vol 482-484 ◽  
pp. 1442-1446
Author(s):  
Rui Hong Tong ◽  
Yi Lv
Keyword(s):  
Detailed Comparison ◽  
Simulation Method ◽  
Object Model ◽  
Convergence Problem ◽  
Implicit Algorithm ◽  
Forming Simulation ◽  
Roll Bending ◽  
Cold Bending ◽  
Process Convergence ◽  
Simulation Parameters

This paper first to roll bending forming algorithm is-implicit algorithm and genetic algorithm was carried on the detailed comparison demonstrates to the existing literature experiment for object model, based on the implicit algorithm, established for prediction of the residual stress multi-channel times roll bending forming simulation method, solve the problems of the simulation process convergence, and the influence of the cold bending forming the prediction precision steel simulation parameters were analyzed. Sure the implicit algorithm based on the roll bending forming lane simulation method, and emphasizes to discuss how to solve the resulting convergence problem.

A Comparison of 3D and Axi-Symmetric Models in Pipe Welding Simulation Process

2014 ◽  
Vol 529 ◽  
pp. 277-281
Author(s):  
Jie Xu ◽  
Xiao Lei Jia ◽  
Yu Fan ◽  
Zhi Sun ◽  
An Min Liu ◽  
...  
Keyword(s):  
Heat Source ◽  
3D Model ◽  
Welding Process ◽  
Detailed Comparison ◽  
Finite Element Models ◽  
Symmetric Model ◽  
Welding Pool ◽  
Welding Simulation ◽  
Pipe Welding ◽  
Simulation Parameters

In this paper, a detailed comparison of axi-symmetric and 3D pipe finite element models was carried out under the condition of same welding simulation parameters. Results showed that axi-symmetric model share similar residual stress distribution with 3D model in the condition of same heat source shape parameters. However, the stress values of the two concerned models were different. Meanwhile the scale of welding pool for 3D model was almost twice bigger than that of axi-symmetric model. Both welding experiment and simulation results of 3D model showed that peak temperature of welding pool along the welding path increased during the welding process, and welding pool width and depth also increased with the moving of heat source.

Simulation on Laser Shock Strengthening of the Crankshaft

2011 ◽  
Vol 121-126 ◽  
pp. 2304-2307
Author(s):  
Tie Jun Wu ◽  
Hong Jun Wang
Keyword(s):  
Experimental Data ◽  
Residual Stress ◽  
Simulation Method ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Ansys Simulation ◽  
Element Simulation ◽  
Simulation Results ◽  
Simulation Parameters ◽  
Shock Processing

The residual stress distribution of fillet of the diesel engine crankshaft on laser shock processing was analyzed by ANSYS software. The simulation results compared with the experimental data, to get results as follows: the simulation results were basically consistent with the experimental data. This fully proved that the finite element simulation method and related simulation parameters were correct. The parameters of laser impacting were optimized by ANSYS simulation, and the residual stress favorable distribution of the crankshaft fillet was obtained.

Research on the Process of NC-ECM with Ball-End Cathode Based on FEM

2010 ◽  
Vol 458 ◽  
pp. 93-98 ◽  
Author(s):  
Yong Yang ◽  
Min Kang ◽  
Xiu Qing Fu
Keyword(s):  
Finite Element Method ◽  
Process Simulation ◽  
Current Density Distribution ◽  
Simulation Method ◽  
Surface Shape ◽  
Two Dimensional ◽  
The Finite Element Method ◽  
Analysis Model ◽  
Ansys Software ◽  
Simulation Parameters

In order to solve the difficulty in analyzing the shaping law of NC-ECM with ball-end cathode, the method of processing simulation was presented based on the finite element method (FEM). The two-dimensional analysis model of the electric field with ball-end cathode built in ANSYS software was solved. The current density distribution and surface shape in different time on the anode were obtained. The experiments based on the simulation parameters were carried out, and the dimensions of the processed surface were measured, which were compared with the theoretical values. It is indicated that the simulation method meets the accuracy of the engineering calculations. The method and theory for further in-depth research on the process simulation in NC-ECM with ball-end cathode are provided.

scholarly journals A woven reinforcement forming simulation method. Influence of the shear stiffness

2006 ◽  
Vol 84 (5-6) ◽  
pp. 351-363 ◽  
Author(s):  
Bassem Zouari ◽  
Jean-Luc Daniel ◽  
Philippe Boisse
Keyword(s):  
Shear Stiffness ◽  
Simulation Method ◽  
Forming Simulation ◽  
Woven Reinforcement

Hot Forming Analysis of Car Door Bar for Ultra High Strength Steel

2010 ◽  
Vol 160-162 ◽  
pp. 836-841
Author(s):  
Yun Kai Gao ◽  
Da Wei Gao ◽  
You Zhi Deng ◽  
Wei Cao
Keyword(s):  
High Strength Steel ◽  
Thickness Distribution ◽  
High Strength ◽  
Simulation Method ◽  
Hot Forming ◽  
Forming Limit ◽  
Boron Steel ◽  
Shell Elements ◽  
Forming Simulation ◽  
Ultra High Strength Steel

Ultra high strength steel plays an important role of light weighting in automotive industry. The hot forming simulation of car door bar is processed with 22MnB5 ultra high strength boron steel. FEM is built with the 12 nodes shell elements and MAT 106 is selected in LS-DYNA. The hot forming processes include two heat transfers. One is the process from the oven to the tools after the blank is heated. The other is the process after the blank contacts the tools. The hot forming simulation results are obtained by LS-DYNA. The results show that the thickness distribution, the forming limit and the maximum effective plastic strain and other performances attain to standards. It is proved that the hot forming simulation method is correct.

Structural Classification of Complex Molecules by Artificial Intelligence Techniques

2011 ◽  
pp. 25-91 ◽  
Author(s):  
Francisco Torrens ◽  
Gloria Castellano
Keyword(s):  
Trichomonas Vaginalis ◽  
Field Data ◽  
Biological Significance ◽  
Detailed Comparison ◽  
Local Anaesthetics ◽  
Simulation Method ◽  
Quantitative Structure Activity Relationship ◽  
Molecular Phylogenetic ◽  
Biological Tests ◽  
1918 Influenza

Algorithms for classification and taxonomy bases on criteria, e.g., information entropy. The feasibility of replacing a given molecule by similar ones in the composition of a complex drug is studied. Some local anaesthetics currently in use are classified using structural properties. In taxonomy the detailed comparison of the sequences of biomolecules, proteins or nucleic acids, allows the reconstruction of a molecular phylogenetic tree. The method is applied to the classifications of (1) indazolols (against Trichomonas vaginalis), (2) fullerenes and fullerite, (3) living and heat-inactivated lactic acid bacteria against cytokines, (4) phylogenesis of avian birds and 1918 influenza virus, (5) local anaesthetics, (6) transdermal-delivery percutaneous enhancers, (7) quantitative structure–activity relationship of anti-human immunodeficiency virus (HIV) compounds, (8) HIV inhibitors, e.g., thiocarbamates, N-aryloxazolidinone-5-carboxamides and styrylquinolines, (9) antimalarial aryltriazolylhydroxamates, (10) N-aryl-N-(3-aryl-1,2,4-oxadiazol-5-yl) amines against prostate cancer, antimitotic 2-phenylindole-3-carbaldehydes against breast cancer and anti-tubulin agents against gastric cancer with indole ring. The entropy contributions may be studied with the equipartition conjecture. It is not within the scope of our simulation method to replace biological tests of drugs or field data in palaeontology, but such simulation methods can be useful to assert priorities in detailed experimental research. Available experimental and field data should be examined by different classification algorithms to reveal possible features of real biological significance.

Optimization Research on Ventilation Modes of Anatomy Laboratory

2013 ◽  
Vol 353-356 ◽  
pp. 3044-3048
Author(s):  
Chuan Hui Zhou ◽  
Ya Ming Zeng
Keyword(s):  
Air Quality ◽  
Concentration Field ◽  
Simulation Method ◽  
Equation Model ◽  
Formaldehyde Concentration ◽  
Ventilation Modes ◽  
Anatomy Laboratory ◽  
Effective Ventilation ◽  
Simulation Parameters

Good indoor air quality is the basic requirement of people's production and life, so it becomes more and more important and urgent to improve the air quality of the anatomy laboratory. According to the specific characteristics of the anatomy laboratory, the paper simulates the distribution of the velocity field, the formaldehyde concentration field and the air age of five ventilation modes by using the standard k-ε two equation model. The research will get a more effective ventilation model by comparing the simulation results. Then the simulation parameters will be adjusted based on the experimental results, it shows that the measured results are correspondent with the re-simulated results, and the error is also within the acceptable range. It is further to verify that the simulation method is feasible, and the conclusions obtained on this basis are acceptable.

Dynamic Analysis of Hydraulic Roll Bending System for Asymmetric Loading

2011 ◽  
Vol 121-126 ◽  
pp. 3243-3247
Author(s):  
Xing Chun Yan ◽  
Zhi Fang Liu ◽  
Yong Qin Wang ◽  
Yuan Xin Luo
Keyword(s):  
Simulation Method ◽  
Rolled Plate ◽  
Design Parameters ◽  
Dynamics Model ◽  
Rolling Mills ◽  
Steel Making ◽  
Asymmetric Loading ◽  
Roll Bending ◽  
Asymmetric Load

To increase quality of the final product, high-precision rolling mills have been used in the modern steel making industry. Hydraulic bending system is widely used to improve the precise of the rolled plate products. In this paper, the dynamics model of hydraulic bending system for asymmetric load is built, and the simulation method is proposed accordingly. The simulation is realized in MATLAB/Simulink. Then an illustrative example is given for demonstrative of the model. Also, the effects of the design parameters are analyzed and some nonlinear factors, such as, flow characteristic, load damping of servo valves, are considered in this simulation. It’s believed that this research will help to analysis and optimize the design of roll bending system

Sources of Error in a Simulation of Rigid Parts on a Vibrating Rigid Plate

2010 ◽  
Vol 5 (4) ◽  
Author(s):  
Stephen Berard ◽  
Binh Nguyen ◽  
Kurt Anderson ◽  
J. C. Trinkle
Keyword(s):  
Rigid Body ◽  
Simulation Method ◽  
Plate Motion ◽  
Rigid Plate ◽  
Step Size ◽  
Body Contact ◽  
Time Stepping ◽  
Numerical Studies ◽  
Simulation Parameters ◽  
Part Motion

We present a simulation study of an important rigid-body contact problem. The system in question is composed of a rigid plate and a single rigid body (or particle). The plate follows a prescribed periodic motion of small amplitude and high frequency, such that the net force applied to the part appears to be from a time-independent, position-dependent velocity field in the plane of the plate. Theoretical results obtained by Vose et al. were found to be in good agreement with simulation results obtained with the Stewart–Trinkle time-stepping method. In addition, simulations were found to agree with the qualitative experimental results of Vose et al. After such verification of the simulation method, additional numerical studies were done that would have been impossible to carry out analytically. Specifically, we were able to demonstrate the convergence of the method with decreasing step size (as predicted theoretically by Stewart). Further analytical and numerical studies will be carried out in the future to develop and select robust simulation methods that best satisfy the speed and accuracy requirements of different applications. With the accuracy of our time-stepper verified for this system, we were able to study the inverse problem of designing new plate motions to generate a desired part motion. This is done through an optimization framework, where a simulation of the part interacting with the plate (including the full dynamics of the system) is performed, and based on the results of the simulation the motion of the plate is modified. The learned (by simulation) plate motion was experimentally run on the device, and without any tuning (of the simulation parameters or device parameters) our learned plate motion produced the desired part motion.

Formability Analysis with Precise Surface Building for the Automobile Outer Clutch Shell

2013 ◽  
Vol 718-720 ◽  
pp. 244-248
Author(s):  
Solomon Tiruneh Gobu ◽  
Yu Jun Cai ◽  
Qiang Yu
Keyword(s):  
Sheet Metal ◽  
Deep Drawing ◽  
Metal Forming ◽  
Design Methodology ◽  
Shell Surface ◽  
Forming Simulation ◽  
Simulation Process ◽  
Die Surface ◽  
Different Dimensions ◽  
Simulation Parameters

Majority of automobile and appliance components are made by deep drawing sheet metal process. So these growing needs demand a new design methodology based on metal forming simulation. With the help of metal forming simulation we can identify the problem areas and solutions can be validated. The aim of this research is to develop techniques that would reduce the amount of time spent during the tool qualifying stage. In this paper the draw tools on Automobile outer clutch shell surface are designed by the precise die surface at different dimensions and draw processes is analyzed with appropriate simulation parameters. From this we got the most reliable results. The compression with the tryout part shows that the simulation process can accurately predict the formability problems.

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