Numerical Simulation of Intermediate Frequency Induced Heating Steel Plate with Finite Element Method

2011 ◽  
Vol 189-193 ◽  
pp. 1519-1526
Author(s):  
Yong Lin Ma ◽  
Miao Cai ◽  
Qiang Han ◽  
Wen Li He
Keyword(s):  
Numerical Simulation ◽  
Steel Plate ◽  
Heating Temperature ◽  
Fem Simulation ◽  
Intermediate Frequency ◽  
Heating Process ◽  
Uniform Temperature ◽  
Temperature Distributions ◽  
Very High ◽  
Simulation Condition

The FEM simulation is used to study the intermediate frequency induced heating process. The temperature distributions and temperature differences are obtained by two kind frequencies of 500 and 1000Hz. It is found that, in this simulation condition, the length of uniform temperature region is about three times of the coil height. It is obvious that, no matter which frequency, the heating rate is very high. With the process of 1000Hz, in less than 20 seconds, the heating temperature can reach a reasonable temperature, and with a process of 500Hz, the temperature can reach a reasonable temperature in more than 40 seconds. It is recommended that the frequency between 500 to 1000Hz could be available for a practical use.

scholarly journals Study on the Mechanism of Interfacial Friction Heating in Polymer Ultrasonic Plasticization Injection Molding Process

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1407 ◽  
Author(s):  
Tao Peng ◽  
Bingyan Jiang ◽  
Yang Zou
Keyword(s):  
Injection Molding ◽  
Heating Temperature ◽  
Fem Simulation ◽  
Polymeric Materials ◽  
Interfacial Friction ◽  
Heating Process ◽  
Injection Molding Process ◽  
Ultrasonic Frequency ◽  
Friction Heating ◽  
Micro Parts

Ultrasonic Plasticization Injection Molding (UPIM) is an effective way to manufacture polymeric micro parts and has great potential for energy saving with processing polymeric materials of a small amount. To better control the UPIM process and improve the quality of micro parts, it is necessary to study the heat generation mechanism. In this paper, the interfacial friction heating process of UPIM was studied by finite element (FEM) simulation and experiment, and the temperature change in the friction interface was estimated. Then, the effects of different process parameters such as ultrasonic frequency and ultrasonic amplitude on the friction heating process were analyzed. The results showed that the rising trend of friction heating temperature was transient (finished within 1 s), and the change trend of FEM simulation was consistent with experimental results. Adjusting ultrasonic frequency and amplitude has a significant influence on the friction heating process. Increasing the ultrasonic frequency and amplitude can improve the efficiency of friction heating.

Numerical Simulation on Temperature Distributions to Cold Store

2012 ◽  
Vol 217-219 ◽  
pp. 1460-1464 ◽  
Author(s):  
Jing Xie ◽  
Yi Tang ◽  
Jin Feng Wang ◽  
Chen Miao ◽  
Yong Yan Lin
Keyword(s):  
Numerical Simulation ◽  
Simple Algorithm ◽  
Simulation Method ◽  
Calculation Error ◽  
Cooling Process ◽  
Temperature Distributions ◽  
Cold Store ◽  
Simulation Results ◽  
Experimental Values ◽  
Simulation Condition

On the basis of previous work, the simulation condition of cold store was improved to reduce calculation error. The SIMPLE algorithm and Boussineq assumption were used and the turbulent intensity was also set. The numerical simulation results reflected that the temperature distribution was closer to the previous experimental results after using new method. The error between simulation values and experimental values was decreased. The simulation result showed that temperature of corner was highest in the cold store. The temperature change of the cold store in the cooling process could be better predicted by using modified simulation method and the accuracy of numerical simulation of cold store in the cooling process could also be validated.

scholarly journals MODELING OF THE TEMPERATURE DISTRIBUTION DENSITY FUNCTION IN A DETAIL AT A CONSTANT HEATING TEMPERATURE

2018 ◽  
pp. 57-64
Author(s):  
A. N. Chichko ◽  
S. G Likhousov ◽  
O. A. Sachek ◽  
O. I. Chichko ◽  
T. V. Matyushinets
Keyword(s):  
Numerical Simulation ◽  
Temperature Distribution ◽  
Thermal Stresses ◽  
Distribution Density ◽  
Heating Temperature ◽  
Heating Process ◽  
Simulation Data ◽  
Distribution Density Function ◽  
The Difference ◽  
Constant Heating

The functions of the temperature distribution density of the detail on the basis of the results of numerical simulation of the heating process are calculated. Characteristics of the temperature distribution function of the detail for analysis of the level of formation of thermal stresses are proposed. It was shown that the difference between the maximum and minimum temperatures of the detail varies nonlinearly with the time of heating the detail in the furnace. The method for formalizing numerical simulation data for selecting the best thermal modes for heating details is proposed.

scholarly journals Effect of Heating Process on Microstructure and Properties of 2205/Q235B Composite Interface

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1027 ◽  
Author(s):  
Fengqiang Xiao ◽  
Dongpo Wang ◽  
Zhiming Gao ◽  
Lanju Zhou
Keyword(s):  
Steel Plate ◽  
Heating Temperature ◽  
Heating Process ◽  
Diffusion Distance ◽  
Metallurgical Bonding ◽  
Interface Characteristics ◽  
Composite Interface ◽  
Clad Steel ◽  
Interfacial Gap ◽  
Rolling Deformation

In this paper, the influence of heating process parameters on interface characteristics and mechanical properties of 2205/Q235B clad steel plate was systematically studied. The results showed that the interfacial gap of the 2205/Q235B composite blank was completely bonded by the mutual diffusion of elements under the action of temperature and metallurgical bonding is achieved. The shear strength of the air-cooled samples was only 114–132 MPa, which was far lower than that of water-quenched samples and rolling deformation samples and was unable to meet the requirements of engineering applications. With the increase in heating temperature and holding time, the diffusion distance of the Cr element gradually increased. After rolling deformation, the diffusion distance of the Cr element was significantly reduced to 4.1–10.2 μm. Rolling deformation of the specimen in the decarburization showed the lowest microhardness, and in combination with the microhardness of the interface is about 236–256 HV, which is between the hardness of Q235B and 2205. The 2205 stainless-steel shows the lowest corrosion rate and the best corrosion resistance when rolling at 1200 °C. It was found that the corrosion was the most significant in the side of Q235B near the bonding zone. The corrosion pit width increased gradually with increased heating temperature.

scholarly journals Design and Manufacturing of a Disposable, Cyclo-Olefin Copolymer, Microfluidic Device for a Biosensor †

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1178 ◽  
Author(s):  
Jorge Prada ◽  
Christina Cordes ◽  
Carsten Harms ◽  
Walter Lang
Keyword(s):  
Microfluidic Device ◽  
Heating Temperature ◽  
Low Cost ◽  
Reaction Chamber ◽  
Microfluidic System ◽  
Heating Process ◽  
Design And Manufacturing ◽  
On Chip ◽  
Working Parameters ◽  
Auto Fluorescence

This contribution outlines the design and manufacturing of a microfluidic device implemented as a biosensor for retrieval and detection of bacteria RNA. The device is fully made of Cyclo-Olefin Copolymer (COC), which features low auto-fluorescence, biocompatibility and manufacturability by hot-embossing. The RNA retrieval was carried on after bacteria heat-lysis by an on-chip micro-heater, whose function was characterized at different working parameters. Carbon resistive temperature sensors were tested, characterized and printed on the biochip sealing film to monitor the heating process. Off-chip and on-chip processed RNA were hybridized with capture probes on the reaction chamber surface and identification was achieved by detection of fluorescence tags. The application of the mentioned techniques and materials proved to allow the development of low-cost, disposable albeit multi-functional microfluidic system, performing heating, temperature sensing and chemical reaction processes in the same device. By proving its effectiveness, this device contributes a reference to show the integration potential of fully thermoplastic devices in biosensor systems.

Numerical analysis of heat flow in oxy-ethylene flame cutting of steel plate

2016 ◽  
Vol 232 (4) ◽  
pp. 742-751 ◽  
Author(s):  
Kang-Yul Bae ◽  
Young-Soo Yang ◽  
Myung-Su Yi ◽  
Chang-Woo Park
Keyword(s):  
Numerical Simulation ◽  
Heat Flow ◽  
Heat Affected Zone ◽  
Steel Plate ◽  
Cutting Parameters ◽  
Cutting Process ◽  
Heat Sources ◽  
Power Functions ◽  
Severe Problem ◽  
Ethylene Flame

To manufacture a steel structure, in the first step, raw steel plate needs to be cut into proper sizes. Oxy-fuel flame is widely used in the cutting process due to its flexibility with respect to accessibility, plate thickness, cost, and material handling. However, the deformation caused by the cutting process frequently becomes a severe problem for the next process in the production of steel product. To decrease the deformation, the thermo-elasto-plastic behavior of the steel plate in the cutting process should be analyzed in advance. In this study, heat sources in oxy-ethylene flame cutting of steel plate were modeled first, and the heat flow in the steel plate was then analyzed by the models of the heat sources using a numerical simulation based on the finite element method. To verify the analysis by the numerical simulation including the models, a series of experiments were performed, and the temperature histories at several points on the steel plate during the cutting process were measured. Moreover, the predicted sizes of the heat-affected zone by the numerical simulations according to the variation in the cutting parameters were compared to the experimental results. The power functions of the relationship between the sizes of the heat-affected zone and cutting parameters were obtained by the recursion analysis using the correlation between the results and parameters. The results of the numerical simulation showed good agreement with those of the experiments, indicating that the proposed models of the heat sources and thermal analysis were feasible to analyze the heat flow in the steel plate during the cutting process.

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