Modeling of Thickness of the Oxide Film in ELID Grinding

2010 ◽  
Vol 135 ◽  
pp. 376-381 ◽  
Author(s):  
Hua Li Zhang ◽  
Ji Cai Kuai ◽  
Fei Hu Zhang
Keyword(s):  
Oxide Film ◽  
Theoretical Calculation ◽  
Simulation Analysis ◽  
Oxide Films ◽  
Calculation Model ◽  
Experimental Results ◽  
Elid Grinding ◽  
On Line ◽  
Simulation Results ◽  
Good Agreement

The properties of oxide films are very important for improving the mass of ELID grinding surface. In this paper, a novel calculation model of thickness of oxide films was proposed; the theoretical calculation and simulation analysis were developed, and were compared with the corresponding experimental results. The results proved that the theoretical calculation and simulation results of the thickness of the oxide films had good agreement with the experimental results. This model could predict precisely the change of thickness of oxide film, the instinct of non-linear electrolysis was explained from a novel aspect of ability of pulsed electrolysis. This model could be used in the on-line control of electrolytic state during practical ELID grinding process.

Bond-Slip Numerical Simulation of Concrete and Gypsum Board

2011 ◽  
Vol 255-260 ◽  
pp. 3133-3136
Author(s):  
Quan Bin Zhao ◽  
Xin Liang Jiang
Keyword(s):  
Numerical Simulation ◽  
Constitutive Relation ◽  
Simulation Analysis ◽  
Experimental Results ◽  
Gypsum Board ◽  
Bond Slip ◽  
Pull Out ◽  
Simulation Results ◽  
Research Situation ◽  
Good Agreement

The characteristics and research situation of bond-slip performance at the inter face of concrete and other materials are introduced, and the bond-slip constitutive relation models are summarized at the same time. Through the load-slip curves obtained from the pull-out experiment of CFFP, the proposed bond-slip constitutive relation models are presenting, including the simple one. With the numerical simulation analysis of CFFP is carried out by the use of the proposed constitutive relation, while the numerical simulation results are in good agreement with the experimental results conducted before, which is feasible and can be applied to further research on CFFP.

scholarly journals Numerical Simulations of V-Shaped Plates Subjected to Blast Loadings: A Validation Study

2016 ◽  
Vol 10 (11) ◽  
pp. 203
Author(s):  
Mohd Zaid Othman ◽  
Qasim H. Shah ◽  
Muhammad Akram Muhammad Khan ◽  
Tan Kean Sheng ◽  
M. A. Yahaya ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Numerical Simulations ◽  
Variable Mass ◽  
Blast Loading ◽  
Experimental Results ◽  
Average Difference ◽  
Simulation Results ◽  
Blast Loadings ◽  
Carrier Vehicle ◽  
Good Agreement

A series of numerical simulations utilizing LS-DYNA was performed to determine the mid-point deformations of V-shaped plates due to blast loading. The numerical simulation results were then compared with experimental results from published literature. The V-shaped plate is made of DOMEX 700 and is used underneath an armour personal carrier vehicle as an anti-tank mine to mitigate the effects of explosion from landmines in a battlefield. The performed numerical simulations of blast loading of V-shaped plates consisted of various angles i.e. 60°, 90°, 120°, 150° and 180°; variable mass of explosives located at the central mid-point of the V-shaped vertex with various stand-off distances. It could be seen that the numerical simulations produced good agreement with the experimental results where the average difference was about 26.6%.

scholarly journals Numerical Method for Fuel Distribution Downstream of the Emulsifying Channel Injector

1985 ◽  
Author(s):  
Liu Bing ◽  
Wang Hong-Ji
Keyword(s):  
Differential Equation ◽  
Numerical Method ◽  
Calculation Model ◽  
Experimental Results ◽  
Two Dimensional ◽  
Physical Processes ◽  
Mixture Formation ◽  
Fuel Distribution ◽  
Good Agreement

Based upon experimental results, the physical processes of fuel-air mixture formation downstream of the emulsifying channel injector (ECI) have been studied and a calculation model for predicting fuel distribution downstream of ECI has been proposed in this paper. The two-dimensional differential equation of diffusion is solved by numerical method and the fuel distribution downstream of ECI is calculated. The calculated values are in good agreement with the experimental results.

scholarly journals Numerical Simulation Analysis of Cavitation Performance of Tandem Propeller

2018 ◽  
Vol 36 (3) ◽  
pp. 509-515 ◽  
Author(s):  
Xiaoxu Du ◽  
Zhengdong Zhang
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Cavitation Number ◽  
Hydrodynamic Characteristics ◽  
Turbulent Model ◽  
Cavitation Model ◽  
Cavitation Phenomenon ◽  
Cavitation Performance ◽  
Simulation Results ◽  
Good Agreement

The steady non cavitation hydrodynamic characteristics of CLB4-55-1 tandem propeller and the steady cavitation flows of NACA66 hydrofoil are numerically studied firstly based on the RANS equations of homogeneous multiphase using CFD theory, combined with the SST k-ω turbulent model and Z-G-B cavitation model. Numerical simulation results are in good agreement with the experimental results, which indicates that the numerical method is reliable and accurate. Then, the cavitation performance of the tandem propeller are numerical simulated and analyzed. The results show that the computational model can predict the cavitation performance of tandem propeller accurately. The cavitation performance of tandem propeller is nearly the same as single propeller, however, the cavitation phenomenon of back propeller is greater than the head propeller at certain advance coefficient and cavitation number. The cavitation phenomenon will disappear with the increase of the advance coefficient or the cavitation number.

Stick-Slip Vibration Between Two Large Concentric Circular Discs in Rotational Contact With Multiple Point Loads

2003 ◽  
Author(s):  
M. Baleri ◽  
F. Sassani ◽  
P. L. Ko
Keyword(s):  
Experimental Results ◽  
Integral Model ◽  
Mathematical Representation ◽  
Multiple Point ◽  
Stick Slip ◽  
System Parameters ◽  
Modeling Simulation ◽  
Contact Loads ◽  
Simulation Results ◽  
Good Agreement

This paper presents a study of the stick-slip frictional phenomenon when large contact areas subjected to uneven contact loads are involved. The objective of the investigation is to gain better understanding of the phenomenon from experimental observations and to develop a mathematical representation that can be used for modeling, simulation and design purposes. A dynamic integral-model has been proposed and simulations have been carried out. The effects of various system parameters on the behavior of the system have been studied experimentally and analytically. The simulation results using the proposed integral-model are in good agreement with the experimental results. The latter also show that stick-slip vibrations can be influenced by the loading conditions.

Simulation Analysis on Passing Curve of Urban Track Vehicle

2011 ◽  
Vol 308-310 ◽  
pp. 1956-1960
Author(s):  
Yan Yan Zuo ◽  
Qing Bin Chang
Keyword(s):  
Simulation Analysis ◽  
Calculation Model ◽  
Track Irregularity ◽  
Simulation Results ◽  
Set Up

In order to study the curve passing performance of urban track vehicle and to evaluate its safety, the calculation model was established and simplified. Then track irregularity was used as input and passing curve was set up. The simulation modal was produced with software SIMPACK. With the track irregularity, the traveling safety of the vehicle was analyzed. The simulation results show that the traveling safety of the track vehicle could satisfy the requirement of relevant standard.

The Simulation and Analysis on Leakage Flow Rate of Plunger Pair of Plunger Water Hydraulic Motor

2015 ◽  
Vol 779 ◽  
pp. 62-67
Author(s):  
Ze Yin Shan ◽  
Rui Bo Yuan ◽  
Chao Li
Keyword(s):  
Theoretical Calculation ◽  
Flow Rate ◽  
Simulation Analysis ◽  
Leakage Flow ◽  
Hydraulic Motor ◽  
Plunger Pair ◽  
Leakage Flow Rate ◽  
Fluent Software ◽  
Water Hydraulic ◽  
Simulation Results

Plunger pair of plunger water hydraulic motor has the problem of leakage. Simulation of the leakage of plunger pair of plunger water hydraulic motor is carried out. Through calculation and analysis establish the model of plunger pair of plunger water hydraulic motor. The simulation analysis of leakage of plunger pair was carried out with Fluent software. Theoretical calculation and simulation results of plunger pair are obtained. The results provide basis and method to reduce the leakage of plunger water hydraulic motor and design for the motor plunger.

Formation Mechanism and Simulation of Oxide Film in Electrodeless ELID Grinding

2010 ◽  
Vol 97-101 ◽  
pp. 2961-2964
Author(s):  
Kun Tang ◽  
Shao Hui Yin ◽  
Yu Feng Fan ◽  
Yong Jian Zhu ◽  
Xian Liang Zeng
Keyword(s):  
Oxide Film ◽  
Formation Mechanism ◽  
Growth Process ◽  
Film Formation ◽  
Formation Model ◽  
Nonlinear Functions ◽  
Elid Grinding ◽  
Oxide Film Thickness ◽  
Simulation Results ◽  
Film Formation Mechanism

This paper reports a study on oxide film formation mechanism in electrodeless ELID grinding. The formation mechanism of oxide film was analyzed based on electrochemical principles, its formation model was built and the growth process was also simulated. The simulation results showed that the oxide film thickness h and its growth rate g are nonlinear functions of time t, voltage and duty cycle are important factors which take effect on g and h, and the electrodeless ELID grinding is a process of weak electrolysis and suitable to use micro wheel.

Simulation Analysis of Automotive Exhaust Muffler Performance Based on GT-Power

2011 ◽  
Vol 48-49 ◽  
pp. 1061-1064
Author(s):  
Ming Yi Zhu ◽  
Xiang Yang Zhao ◽  
Qing Liu
Keyword(s):  
Simulation Model ◽  
Insertion Loss ◽  
Pressure Loss ◽  
Simulation Analysis ◽  
Experimental Results ◽  
Automotive Exhaust ◽  
Working Process ◽  
Vehicle Development ◽  
Development Cycle ◽  
Simulation Results

Using GT-Power software to establish the simulation model of the working process of an engine coupled with the muffler, insertion loss and pressure loss are obtained, simulation results are consistent with the experimental results, which verifies the correctness of simulation model.Therefore, it is important to shorten the vehicle development cycle and reduce cost.

Quintuple band circular monopole antenna with innovative 3-D printed PLA substrate for wireless applications

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ashraf E. Ahmed ◽  
Wael A.E. Ali ◽  
Sudipta Das
Keyword(s):  
Polylactic Acid ◽  
Monopole Antenna ◽  
Design Concept ◽  
Experimental Results ◽  
Printed Antenna ◽  
Wireless Applications ◽  
Innovative Technique ◽  
Compact Size ◽  
Simulation Results ◽  
Good Agreement

Abstract In this paper, a circular antenna with a 3-D printed substrate is introduced to achieve a multiband behavior. The circular antenna is matched using a key-shaped stub located on the perimeter of the designed antenna. The 3-DP circular antenna adopted the apollonian gasket technique to perform the multi-circular cuttings in the Polylactic Acid (PLA) substrate as an innovative technique to obtain quintuple bands. The proposed antenna is designed to operate for Bluetooth, WLAN, WiMAX, and other wireless applications in S-band and C-band. The designed antenna has a compact size of 61.1 × 43.6 × 1 mm3. The prototype of the suggested 3-D printed antenna is fabricated and measured to confirm the simulation results. A good agreement is evident between simulation and experimental results which validates the design concept.

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