Process Optimization for the Side-Plate of the Core Part in Parallel Flow Evaporator

2011 ◽  
Vol 55-57 ◽  
pp. 961-965 ◽  
Author(s):  
Ming Jun Liu ◽  
Zhen Yu Zhao ◽  
Bai Liu
Keyword(s):  
Numerical Simulation ◽  
Process Optimization ◽  
Process Parameters ◽  
Parallel Flow ◽  
Side Plate ◽  
The Core ◽  
Plate Production ◽  
Dynamic Software ◽  
Explicit Dynamic ◽  
Core Part

The forming scheme of a side-plate of the core part in parallel flow evaporator was studied. Two forming schemes were compared and the explicit dynamic software DYNAFORM was applied to make simulations about the forming processes. According to comparisons between two forming schemes, the optimized scheme and process parameters were determined. Multi-station dies were designed based on the optimized process. Successful experiments with the dies showed that numerical simulation provided an efficient way for the optimization of the forming scheme in the side-plate production.

The Forming Scheme of a Silencer Cover in Progressive Die

2010 ◽  
Vol 97-101 ◽  
pp. 311-314
Author(s):  
Ming Jun Liu ◽  
Bai Liu ◽  
Fei Tang
Keyword(s):  
Numerical Simulation ◽  
Process Parameters ◽  
Drawing Process ◽  
Progressive Die ◽  
Binding Force ◽  
Simulation And Experiment ◽  
Dynamic Software ◽  
Explicit Dynamic ◽  
Blank Size

The drawing scheme of a silencer cover in the progressive die was studied. This cover was formerly processed by several single punching dies and now was produced by a progressive die. The drawing scheme was hard to determine. Therefore, the explicit dynamic software DYNAFORM was applied to make simulations about the drawing process. According to comparisons between the simulation and experiment results, the optimized drawing scheme, blank layout, blank size, binding force and some other process parameters were determined. The defects were eliminated after the proper drawbead was set. Experiments showed that numerical simulation provided an efficient way for the optimization of the forming scheme in the progressive die production.

Numerical simulation of the crush behavior of tapered tubes

2020 ◽  
Vol 62 (12) ◽  
pp. 1187-1191
Author(s):  
Osman H. Mete ◽  
Halil Kayar
Keyword(s):  
Numerical Simulation ◽  
Traffic Accidents ◽  
Passive Safety ◽  
Security Systems ◽  
Flat Tube ◽  
Passive Safety Systems ◽  
Axial Crush ◽  
Dynamic Software ◽  
Safety Systems ◽  
Explicit Dynamic

Abstract Traffic accidents are increasing as a result of an increasing number of vehicles and population growth in recent years. Active and passive safety systems are used in the vehicles we use today to reduce traffic accidents and prevent casualties. One of the passive security systems is the crush box (crashworthiness). It absorbs the energy generated during a crash by plastic deformation. In this study, tube height, diameter and thickness parameters were kept constant and degrees of conicity were varied 0°(flat tube),3°,7°,10°,12° and 15° The effects of conical crush boxes on axial crush behavior and their energy absorption ability, were investigated by Ls-Dyna explicit dynamic software.

scholarly journals Thermodynamic and Aerodynamic Analysis of an Air-Driven Fan System in Low-Cost High-Bypass-Ratio Turbofan Engine

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1917 ◽  
Author(s):  
Weiyu Lu ◽  
Guoping Huang ◽  
Xin Xiang ◽  
Jinchun Wang ◽  
Yuxuan Yang
Keyword(s):  
Numerical Simulation ◽  
Design Principle ◽  
Low Cost ◽  
Complex Structure ◽  
Batch Production ◽  
Turbofan Engine ◽  
The Core ◽  
And Performance ◽  
Core Part ◽  
Bypass Ratio

In some cases, the improvement of the bypass ratio (BPR) of turbofans is pursued for military or civilian purposes owing to economic, environmental, and performance reasons, among others. However, high-BPR turbofans suffer from incompatibility of spool speed, complex structure for manufacture, development difficulty, and substantially increasing costs, especially for those with small batch production. To deal with the issues, a novel low-cost concept of high-BPR turbofan with air-driven fan (ADTF) is presented in this research. First, the problems faced by high-BPR turbofans are discussed, and the difficulties of geared turbofan (GTF), which is developed as a solution to the problems, are analyzed. A novel turbofan with potential advantages is proposed, and its basic theory is interpreted. Second, high-BPR ADTF is analyzed at the top level, and the design principle and important primary parameters are discussed. Some important concepts and criteria are proposed, enabling the comparison between ADTF and GTF. Finally, an air-driven fan system, the core part of ADTF, is exploratorily designed, and numerical simulation is performed to demonstrate its feasibility.

The Numerical Simulation of Punching and the Fatigue Analysis of Punch Based on ANSYS/LS-DYNA and ANSYS-Fatigue Tool

2014 ◽  
Vol 904 ◽  
pp. 469-473 ◽  
Author(s):  
Wei Min Li ◽  
Yang Yang Yan ◽  
Ying Xing
Keyword(s):  
Numerical Simulation ◽  
Fatigue Life ◽  
Fatigue Analysis ◽  
Surface Treatments ◽  
Stress Result ◽  
Dynamic Software ◽  
Explicit Dynamic

In allusion to the characteristic of stamping moulds fatigue analysis, the nodal stress result is obtained by the numerical simulation of punching with the explicit dynamic software called ANSYS/LS-DYNA. Then the fatigue life of punch about the different surface treatments is calculated by ANSYS-Fatigue tool. Through this way an effective method that is suitable for the calculation and reasonable improvement of stamping moulds fatigue life is obtained.

Contacting Diffusion with FIB for Backside Circuit Edit—Procedures and Material Analysis

2005 ◽  
Author(s):  
U. Kerst ◽  
P. Sadewater ◽  
R. Schlangen ◽  
C. Boit ◽  
R. Leihkauf ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Electrical Properties ◽  
Process Parameters ◽  
Thermal Effects ◽  
Silicon Surface ◽  
Ohmic Contacts ◽  
Ion Beam ◽  
Schottky Barriers ◽  
Material Analysis ◽  
Type Silicon

Abstract The feasibility of low-ohmic FIB contacts to silicon with a localized silicidation was presented at ISTFA 2004 [1]. We have systematically explored options in contacting diffusions with FIB metal depositions directly. A demonstration of a 200nm x 200nm contact on source/drain diffusion level is given. The remaining article focuses on the properties of FIB deposited contacts on differently doped n-type Silicon. After the ion beam assisted platinum deposition a silicide was formed using a forming current in two configurations. The electrical properties of the contacts are compared to furnace anneal standards. Parameters of Schottky-barriers and thermal effects of the formation current are studied with numerical simulation. TEM images and material analysis of the low ohmic contacts show a Pt-silicide formed on a silicon surface with no visible defects. The findings indicate which process parameters need a more detailed investigation in order to establish values for a practical process.

scholarly journals Numerical Simulation and Engineering Application of Coalbed Water Injection

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Yijie Shi ◽  
Pengfei Wang ◽  
Ronghua Liu ◽  
Xuanhao Tan ◽  
Wen Zhang
Keyword(s):  
Numerical Simulation ◽  
Process Parameters ◽  
Water Injection ◽  
Engineering Application ◽  
Working Environment ◽  
Engineering Practice ◽  
Characteristic Parameters ◽  
Injection Process ◽  
Working Face ◽  
Dust Reduction

Coalbed water injection is the most basic and effective dust-proof technology in the coal mining face. To understand the influence of coalbed water injection process parameters and coalbed characteristic parameters on coal wetting radius, this paper uses Fluent computational fluid dynamics software to systematically study the seepage process of coalbed water injection under different process parameters and coalbed characteristic parameters, calculation results of which are applied to engineering practice. The results show that the numerical simulation can help to predict the wetness range of coalbed water injection, and the results can provide guidance for the onsite design of coalbed water injection process parameters. The effect of dust reduction applied to onsite coalbed water injection is significant, with the average dust reduction rates during coal cutting and support moving being 67.85% and 46.07%, respectively, which effectively reduces the dust concentration on the working face and improves the working environment.

Nonlinear Dynamic Response of Buoys under the Collision Load with Ships

2012 ◽  
Vol 204-208 ◽  
pp. 4455-4459 ◽  
Author(s):  
Liu Hong Chang ◽  
Chang Bo Jiang ◽  
Man Jun Liao ◽  
Xiong Xiao
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Analysis Software ◽  
Element Analysis ◽  
Nonlinear Dynamic Response ◽  
Dynamic Finite Element ◽  
Simulation Results ◽  
Collision Force ◽  
Explicit Dynamic ◽  
Element Theory

The explicit dynamic finite element theory is applied on the collision of ships with buoys for computer simulation. Using ANSYS/LS-DYNA finite element analysis software, the numerical simulation of the collision between the ton ship and the buoy with different structures and impact points. The collision force, deformation, displacement parameters and the weak impact points of a buoy are obtained. Based on the numerical simulation results, analysis of buoys and structural collision damages in anti-collision features are discussed, and several theoretical sugestions in anti-collision for the design of buoy are provided.

scholarly journals Numerical Simulation and Process Optimization of Internal Thread Cold Extrusion Process

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 3960
Author(s):  
Hong-Ling Hou ◽  
Guang-Peng Zhang ◽  
Chen Xin ◽  
Yong-Qiang Zhao
Keyword(s):  
Numerical Simulation ◽  
Process Parameters ◽  
Orthogonal Experiment ◽  
Extrusion Process ◽  
Extrusion Temperature ◽  
Maximum Temperature ◽  
Cold Extrusion ◽  
Internal Thread ◽  
Bottom Hole ◽  
Extrusion Forming

In the internal thread extrusion forming, if the process parameters are not selected properly, the extrusion torque will increase, the extrusion temperature will be too high, or even the tap will break. In order to obtain effective process parameters under certain working conditions, this paper uses a combination of numerical simulation and process experiment to analyze the influence of the bottom hole diameter, extrusion speed, and friction factor on the extrusion torque and extrusion temperature. Through an orthogonal experiment, the significant influence law of different process parameters on the extrusion torque and extrusion temperature was studied, and the order of their influence was determined. Based on the optimal process parameters, numerical simulations and process tests were carried out, and the extrusion effect and related parameters were compared and analyzed. The results show that the extruded thread has clear contour, uniform tooth pitch, complete tooth shape, and good flatness. Compared with before optimization, the maximum extrusion torque has been reduced by 37.15%, the maximum temperature has been reduced by 29.72%, and the extrusion quality has been improved. It shows that the optimized method and optimized process parameters have good engineering practicability.

Numerical Simulation of Plate Bender Bending Process

2011 ◽  
Vol 189-193 ◽  
pp. 2228-2232
Author(s):  
Xue Jiang Liu ◽  
Hai Sheng Liu ◽  
Jing Liu ◽  
Hui Gang Wang
Keyword(s):  
Numerical Simulation ◽  
Stress Distribution ◽  
Mechanical Behavior ◽  
Process Optimization ◽  
Plate Bending ◽  
Bending Process

The plate’s mechanical behavior of three-roller plate bending machine had been analyzed in case of upper roller feeding based on ANSYS. Strain and stress distribution of the plate and its changes are gained. The influence of upper roller’s feeding location and bending velocity to bending process are researched. The results are valuable to bending process optimization and practical technique of plate bending.

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