Modeling the Thermal Actuation in a Thermo-Pneumatic Micropump

2003 ◽  
Vol 125 (4) ◽  
pp. 527-530 ◽  
Author(s):  
M. Carmona ◽  
S. Marco ◽  
J. Samitier ◽  
M. C. Acero ◽  
J. A. Plaza ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Quality Parameter ◽  
Ansys Software ◽  
Thermal Dynamics ◽  
Pneumatic Actuation ◽  
Thermal Actuation ◽  
Level Model ◽  
Simulation Results ◽  
High Level ◽  
Good Agreement

The analysis of a thermo-pneumatic actuation unit for its use in a micropump has been carried out. Coupled thermo-mechanical simulations by finite element method (FEM) (with ANSYS software) were required because of the complexity of the device. The simulation results were validated by thermal and mechanical experimental results, showing a good agreement. FEM results have been used to extract a high level model of the actuation unit that can be used to estimate the maximum performance of the micropump operation with this actuation unit. In order to identify the best frequency of operation for the pump, a quality parameter has been defined based on the thermal dynamics of the actuation unit.

Study on Hydraulic Deep Drawing of Square Cups

2014 ◽  
Vol 626 ◽  
pp. 334-339
Author(s):  
Te Fu Huang ◽  
Hsin Yi Hsien ◽  
Yan Jia Chen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Deep Drawing ◽  
Thickness Distribution ◽  
The Finite Element Method ◽  
Experimental Apparatus ◽  
Punch Load ◽  
Simulation Results ◽  
Good Agreement ◽  
Element Method

The friction holding effect and the friction reducing effect occurring during Hydraulic Deep Drawing and the pre-bulging resulting in more plastic deformation on products are applied on sheet hydro-forming. For Hydraulic Deep Drawing of a square cup, the thickness distribution and the relation between the height and the pressure of pre-bulging are simulated with SPCC steels as the specimen by the finite element method. An experimental apparatus of sheet hydro-forming has been constructed to carry out the hydraulic deep drawing experiments of square cups. Experimental thickness distribution and punch load are compared with simulation results. Good agreement was found. The flow patterns of the circular and square blanks with the condition of being firmly pressed against the punch observed from the experiments are in agreement with the predicted results.Keywords:Hydraulic Deep Drawing, sheet hydro-forming, finite element method

Simulation on the Springback Property of Sealing Ring in Nuclear Power Plant

2014 ◽  
Vol 644-650 ◽  
pp. 3881-3885
Author(s):  
Li Liu ◽  
Wei Wei Yu ◽  
Dong Wang Yang
Keyword(s):  
Nuclear Power ◽  
Sharp Decrease ◽  
Analysis Method ◽  
Ansys Software ◽  
Element Analysis ◽  
Sealing Ring ◽  
Simulation Results ◽  
Thermal Influence ◽  
Contact Stress Distribution ◽  
Good Agreement

In order to simulate the thermal influence on springback property of O-ring, based on elastic-plastic contact analysis method of finite element analysis (FEA), numerical simulation of compression-springback course of O-ring was carried out by ANSYS software. The results show that it causes a sharp decrease in the peak force applied on O-ring, corresponding to a decline on the contact stress distribution which may influence the seal ability of the O-ring. The simulation results are in good agreement with the experimental results.

Integrated Flow Analysis During Filling and Post-Filling Stage of Semiconductor Encapsulation

1999 ◽  
Vol 122 (1) ◽  
pp. 20-27 ◽  
Author(s):  
Sejin Han ◽  
K. K. Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Flow Analysis ◽  
Rectangular Cavity ◽  
Experimental Results ◽  
Molding Compound ◽  
Filling Stage ◽  
Semiconductor Chip ◽  
Simulation Results ◽  
Good Agreement

In this paper, flow during the filling and post-filling stages in semiconductor chip encapsulation has been analyzed. A finite-element method based on the Hele-Shaw approximation is used for the flow analysis in the chip cavity. The compressibility of the epoxy-molding compound has been considered to analyze the post-filling stage. The model has been verified by comparing resulting predictions with experimental results. Specifically, pressure has been measured in a rectangular cavity and compared with simulation results. The calculated and experimental results show good agreement. [S1043-7398(00)00101-8]

scholarly journals Different Techniques for Calculating Apparent and Incremental Inductances using Finite Element Method

2015 ◽  
Vol 11 (2) ◽  
pp. 193-201
Author(s):  
Amer Ali
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Magnetic Energy ◽  
Iron Core ◽  
Ansys Software ◽  
Flux Linkage ◽  
Dimensional Finite Element ◽  
Design Documents ◽  
Good Agreement ◽  
Element Method

This work focuses on using two-dimensional finite element method to calculate apparent and incremental inductances for 40W fluorescent lamp ballast with different loading conditions based on its design documents. Seven inductance calculation techniques are adopted by calculating ballast stored magnetic energy and flux linkage using ANSYS software. The calculated results for apparent inductances show a good agreement with the design and average measured values, while calculated incremental inductances have been verified by noting the behavior of core hysteresis loop experimentally. These seven techniques establish a good base for researchers and designers to obtain an accurate inductance profile for any iron-core inductor.

Simulation Studies on the Influence of Impact Velocity on the PELE Penetrated and Broken Reinforced Concrete

2013 ◽  
Vol 690-693 ◽  
pp. 3108-3111 ◽  
Author(s):  
Xiao Jun Ye ◽  
Zhong Hua Du ◽  
Chuan Hui Hu ◽  
Cheng Jun Song ◽  
Xiao Sheng
Keyword(s):  
Finite Element Method ◽  
Reinforced Concrete ◽  
Impact Velocity ◽  
Simulation Studies ◽  
Residual Velocity ◽  
Software Simulation ◽  
Definite Effect ◽  
Simulation Results ◽  
The Impact ◽  
Good Agreement

In order to study the effect of the impact velocity for the penetrator with enhanced lateral effect (PELE) penetrating reinforced concrete (RC) targets, penetration of PELE filled nylon against RC target using the different velocity is simulated by LS-DYNA finite element method software. Simulation shows that the impact velocity have definite effect on broken RC. On condition of PELE having penetrated target, with farther increase of impact velocity, the area of PELE broken RC on the direction of decrease firstly and augmentation thereafter, the residual velocity after penetrating target is less at the same time; Take into account validity of lateral effect and general launching condition, selecting the impact velocity at the range of 800 m/s-1300 m/s is suitable for PELE broken RC. The simulation results are in good agreement with those of the experiments.

scholarly journals TO THE PROBLEM OF DETERMINING THE COEFFICIENT OF THERMAL EXPANSION OF MATERIALS

2020 ◽  
pp. 284-292
Author(s):  
Денис Васильевич Пьянзин ◽  
Николай Александрович Панькин ◽  
Александр Николаевич Чалдышкин ◽  
Николай Иванович Чистяков
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Computer Simulation ◽  
Thermal Expansion ◽  
Software Package ◽  
Coefficient Of Thermal Expansion ◽  
Metallic Materials ◽  
Ansys Software ◽  
Simulation Results ◽  
Good Agreement

Проведено экспериментальное исследование и компьютерное моделирование в программном комплексе ANSYS термического воздействия на металлический материал. Отмечается уменьшение значений коэффициента теплового расширения при увеличении скорости нагрева образца. Показано, что данное поведение обусловлено наличием градиента температур между его центральной и поверхностью частями. Отмечается хорошее согласие результатов компьютерного моделирования с соответствующими экспериментальными данными. Значения коэффициента теплового расширения близки к истинным, которые были определены при малых скоростях нагрева/охлаждения или при длительной выдержке образца при конечной и начальной температурах. Результаты моделирования в ANSYS могут быть использованы при интерпретации и прогнозировании тепловых свойств металлических материалов. An experimental study and computer modeling in the ANSYS software package of the thermal effect on a metal material was carried out. A decrease in the values of the coefficient of the thermal expansion is noted with an increase in the heating rate of the sample. It is shown that this behavior is due to the presence of the temperature gradient between its central and surface parts. Good agreement of the results of computer simulation with the corresponding experimental data is found. The values of the coefficient of thermal expansion are close to true ones determined at low heating / cooling rates or with long exposure of the sample at the final and initial temperatures. The simulation results in ANSYS can be used to interpret and predict thermal properties of metallic materials.

scholarly journals Modeling Support Loss in Torsional Mode Vibrations of a Micromechanical Disk Resonator with Two L-Shaped Support Beams

2017 ◽  
Vol 7 (1) ◽  
pp. 1353-1357
Author(s):  
M. Bagheri ◽  
A. Bijari ◽  
M. Imanparast ◽  
M. Raghebi
Keyword(s):  
Closed Form ◽  
Quality Factor ◽  
Natural Frequencies ◽  
Ansys Software ◽  
Disk Resonator ◽  
Torsional Mode ◽  
Form Equation ◽  
Simulation Results ◽  
Horizontal Support ◽  
Good Agreement

In this paper, a new micromechanical disc resonator with two L-shaped horizontal support beams in torsional mode vibrations has been proposed. The proposed micromechanical resonator has been studied in the field of natural frequencies and support loss. In order to verify the findings of natural frequencies, the analytical results are compared to the simulation results given by ANSYS software. A good agreement between analytical and simulation results is shown. In addition a closed-form equation for support loss quality factor in torsional mode vibrations of the proposed micromechanical resonator is presented. The results show that using L-shaped support beams can improve the support loss quality factor up to two times.

Analysis of the Contact Deformation of Tread Blocks

1992 ◽  
Vol 20 (4) ◽  
pp. 230-253 ◽  
Author(s):  
T. Akasaka ◽  
K. Kabe ◽  
M. Koishi ◽  
M. Kuwashima
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Deformation Behavior ◽  
Contact Deformation ◽  
The Finite Element Method ◽  
The Road ◽  
Loss Of Contact ◽  
Tread Rubber ◽  
Good Agreement ◽  
Rubber Block

Abstract The deformation behavior of a tire in contact with the roadway is complicated, in particular, under the traction and braking conditions. A tread rubber block in contact with the road undergoes compression and shearing forces. These forces may cause the loss of contact at the edges of the block. Theoretical analysis based on the energy method is presented on the contact deformation of a tread rubber block subjected to compressive and shearing forces. Experimental work and numerical calculation by means of the finite element method are conducted to verify the predicted results. Good agreement is obtained among these analytical, numerical, and experimental results.

Modeling and design of role engineering in development of access control for dynamic information systems

2013 ◽  
Vol 61 (3) ◽  
pp. 569-579 ◽  
Author(s):  
A. Poniszewska-Marańda
Keyword(s):  
Information Systems ◽  
Dynamic Information ◽  
Minimal Set ◽  
Distributed Information ◽  
Heterogeneous Information ◽  
System Protection ◽  
Level Model ◽  
Model Independent ◽  
Role Concept ◽  
High Level

Abstract Nowadays, the growth and complexity of functionalities of current information systems, especially dynamic, distributed and heterogeneous information systems, makes the design and creation of such systems a difficult task and at the same time, strategic for businesses. A very important stage of data protection in an information system is the creation of a high level model, independent of the software, satisfying the needs of system protection and security. The process of role engineering, i.e. the identification of roles and setting up in an organization is a complex task. The paper presents the modeling and design stages in the process of role engineering in the aspect of security schema development for information systems, in particular for dynamic, distributed information systems, based on the role concept and the usage concept. Such a schema is created first of all during the design phase of a system. Two actors should cooperate with each other in this creation process, the application developer and the security administrator, to determine the minimal set of user’s roles in agreement with the security constraints that guarantee the global security coherence of the system.

scholarly journals Simulation and Nonlinearity Optimization of a High-Pressure Sensor

Sensors ◽  
2020 ◽  
Vol 20 (16) ◽  
pp. 4419
Author(s):  
Ting Li ◽  
Haiping Shang ◽  
Weibing Wang
Keyword(s):  
High Pressure ◽  
Pressure Sensor ◽  
Pressure Sensors ◽  
Original Model ◽  
Ansys Software ◽  
Nonlinear Error ◽  
Sensor Model ◽  
Optimized Model ◽  
Simulation Results ◽  
Better Than

A pressure sensor in the range of 0–120 MPa with a square diaphragm was designed and fabricated, which was isolated by the oil-filled package. The nonlinearity of the device without circuit compensation is better than 0.4%, and the accuracy is 0.43%. This sensor model was simulated by ANSYS software. Based on this model, we simulated the output voltage and nonlinearity when piezoresistors locations change. The simulation results showed that as the stress of the longitudinal resistor (RL) was increased compared to the transverse resistor (RT), the nonlinear error of the pressure sensor would first decrease to about 0 and then increase. The theoretical calculation and mathematical fitting were given to this phenomenon. Based on this discovery, a method for optimizing the nonlinearity of high-pressure sensors while ensuring the maximum sensitivity was proposed. In the simulation, the output of the optimized model had a significant improvement over the original model, and the nonlinear error significantly decreased from 0.106% to 0.0000713%.

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