Temperature Distribution and Operating Efficiency in Rectangular Cold Crucible Directional Solidifying Ti46Al0.5W0.5Si Alloys

2011 ◽  
Vol 117-119 ◽  
pp. 335-338
Author(s):  
Jie Ren Yang ◽  
Rui Run Chen ◽  
Hong Sheng Ding ◽  
Jing Jie Guo ◽  
Yan Qing Su ◽  
...  
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Numerical Calculation ◽  
Temperature Distribution ◽  
Element Model ◽  
Operating Efficiency ◽  
Heating Process ◽  
Cold Crucible ◽  
Directionally Solidified ◽  
The Finite Element Model

This paper gives a detailed study of temperature distribution on Ti46Al0.5W0.5Si alloy directionally solidified by cold crucible. Based on experiment and numerical calculation, the heating process under different power was investigated, and the operating efficiency of cold crucible was roughly calculated. Further, the temperature field of Ti46Al0.5W0.5Si alloy under high power was numerically calculated, the finite element model predicted the temperature distribution at different moment. The results give a significance guide on cold crucible directional solidification.

Analysis of the Temperature Field of the Diamond Wheel Dressed Using Laser Assisted Ultrasonic-Vibration Combined Dressing Method

2016 ◽  
Vol 874 ◽  
pp. 261-267 ◽  
Author(s):  
Zhi Bo Yang ◽  
Zhen Zhang ◽  
Rui Yun Yang ◽  
Ai Ju Liu
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Finite Element Model ◽  
Ultrasonic Vibration ◽  
Working Conditions ◽  
Element Model ◽  
Diamond Wheel ◽  
Dressing Method ◽  
Infrared Temperature Measurement ◽  
The Finite Element Model

During the dressing process of diamond wheel using laser/ultrasonic-vibration combined dressing method, the removal mode of the local materials on the surface of wheel with the use of laser’s heating effect transits from brittle fracture to plastic flow, so that the wear of diamond dresser can be reduced and the dressing efficiency and surface dressing quality can be improved. Using ANSYS analysis software, the three-dimensional units were used and the nonlinearity of the material’s thermophysical properties was taken into account, and thereby, the finite element model of the temperature field of the diamond wheel heated by the laser during the dressing process was constructed. Then, the distributions of the temperature field on the surface and section of the wheel under different technological parameter were acquired. Moreover, the temperature distribution of the dressed wheel under actual working conditions was measured using infrared temperature measurement method. The results indicate that, under the same working conditions, the simulation results using finite element model fit well with the measured values, i.e., the finite element model has important guiding significance to the selection of technological parameters in dressing.

Thermal Response Analysis and FE Modeling of Weapon

2012 ◽  
Vol 503-504 ◽  
pp. 11-14
Author(s):  
Yan Jun Zhao ◽  
Xin Jun Li ◽  
Yong Hai Wu ◽  
Cheng Xu
Keyword(s):  
Thermal Analysis ◽  
Finite Element ◽  
Temperature Field ◽  
Research Work ◽  
Thermal Response ◽  
Element Model ◽  
Response Analysis ◽  
Fe Modeling ◽  
Effects Of Temperature ◽  
The Finite Element Model

Thermal is a important factor that affect weapon firing accuracy and security in the process of weapon fire, so thermal analysis of weapon has important meaning . Aim at researched Weapon, the finite element model of the gun body was built, the temperature field of the gun body was calculated by FEM. The effects of temperature of the gun body on firer and aiming mechanism were also studied. Current research work will be helpful the weapon design

Finite element modeling and experimental validation of radio frequency heating (RFH) of curved laminated wood-based panels

Holzforschung ◽  
2014 ◽  
Vol 68 (6) ◽  
pp. 699-705 ◽  
Author(s):  
Jianhui Zhou ◽  
Chuanshuang Hu ◽  
Xiaoying Ma ◽  
Xingwei Guo
Keyword(s):  
Finite Element ◽  
Temperature Distribution ◽  
Hot Pressing ◽  
Core Layer ◽  
Ambient Air ◽  
Element Model ◽  
Time Dependent ◽  
Heating Process ◽  
Radio Frequency Heating ◽  
Shape Effects

Abstract Thin medium-density fiberboards (MDF) are often used for the production of curved laminated furniture components by post-hot pressing with radiofrequency heating (RFH). Dimensional instability is one of the major quality problems of these products, and inappropriate heating process was discussed as the main reason for this. In the present study, a finite element model (FEM) was developed in this context, and the temperature distribution within laminated MDF panels was predicted aiming at optimizing the hot-pressing process with RFH. The time-dependent temperatures were collected by temperature sensing strips (TSS). The results agreed well with those obtained by the simulation model. Accordingly, the FEM developed here is well suited for predicting the heating behavior during hot pressing with RFH. The temperature distribution of the curved laminated MDF panels was not symmetric and not uniform because of curved shape effects and the heat convection between MDF panels and ambient air. The time-dependent temperatures of the top and bottom layers were lower than that of the core layer.

Performance Evaluation of Thermal Spraying Coatings Based on Microstructure

2019 ◽  
Vol 815 ◽  
pp. 54-60
Author(s):  
Ning Guan ◽  
Xiao Jing Yuan ◽  
Xiao Hu Chen ◽  
Xian Yu Zhang
Keyword(s):  
Finite Element ◽  
Performance Evaluation ◽  
Numerical Calculation ◽  
Thermal Spraying ◽  
Element Model ◽  
Performance Parameters ◽  
Analysis Model ◽  
Effective Evaluation ◽  
Basic Performance ◽  
The Finite Element Model

At present, the performance evaluation of thermal spraying coating mainly depends on experimental test and numerical calculation, but due to the limitation of error and algorithm, neither of the two algorithms can effectively satisfy the effective evaluation of thermal spraying performance. In this paper, taking WC/Co coating as an example, a new method for calculating the performance parameters of thermal spraying coatings is proposed, that is, the finite element model and the analysis model of coating parameters are established for the microstructure of the coatings under different magnification, respectively. By calculating the basic performance parameters of the coatings, the macro performance parameters of the thermal spraying coatings are obtained, so that the performance of the coatings can be evaluated.

Finite Element Modeling of Temperature Distribution in Spark Plasma Sintering

2010 ◽  
Vol 434-435 ◽  
pp. 808-813 ◽  
Author(s):  
Cao Wang ◽  
Zhe Zhao ◽  
Lai Fei Cheng
Keyword(s):  
Finite Element ◽  
Temperature Distribution ◽  
Spark Plasma Sintering ◽  
Coupled Model ◽  
Element Model ◽  
Heating Process ◽  
Sintering Process ◽  
Heating Rates ◽  
Plasma Sintering ◽  
Spark Plasma

A finite element model (FEM) is developed to simulate the temperature distribution in the sample/die/punch assembly during the spark plasma sintering (SPS) process. A thermal–electrical coupled model with temperature dependent thermal and electrical properties is implemented. The simulation studies were conducted using COMSOL and a range of heating-rates and die sizes were considered. Also, both temporary and equilibrium condition during heating process were evaluated in order to express the real temperature development in the sintering. During the spark plasma sintering process, the temperature difference between the sample center and the die surface depend on the heating-rate and die size. The simulation results also revealed that the temperature gradient during the heating process is much bigger than that in the dwelling period. It is necessary to consider the temporary state during the spark plasma sintering process in order to guarantee a well–controlled microstructure, especially in non-conductive ceramic materials.

Research of the Fins Thickness Based on 600MW Supercritical Boiler Water-Wall Cross-Section Temperature Distribution

2012 ◽  
Vol 516-517 ◽  
pp. 384-389
Author(s):  
Yong Jun Su ◽  
Jun Bao Yang
Keyword(s):  
Finite Element ◽  
Temperature Distribution ◽  
Cross Section ◽  
Element Model ◽  
Boiler Water ◽  
Point Temperature ◽  
Water Wall ◽  
Optimal Value ◽  
The Finite Element Model ◽  
Whole Water

The finite element model of supercritical boiler water-wall has been established and the ANSYS10.0 was used to simulate cross-section temperature distribution. The simulation result shows that fin-point is the highest temperature on the whole water-wall cross-section. As the fins thickness changed, fin-point temperature has a optimal value；Basing on some 600MW supercritical boiler, it has an optimal value when the fins thickness ranged from 7mm to 9mm.

Temperature Field Analysis of LNG Tank under Ultra-Low Temperature Based on Finite Element Method

2015 ◽  
Vol 733 ◽  
pp. 566-569
Author(s):  
Ming Shuo Yang ◽  
Bin Zhao ◽  
Jing Wei Liu ◽  
Hong Gang Cai
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temperature Field ◽  
Low Temperature ◽  
Element Model ◽  
Field Analysis ◽  
Lng Tank ◽  
Simulation Parameters ◽  
The Finite Element Model ◽  
Element Method

LNG tank has extremely low operating temperature, hazardous storage medium and large capacity storage space, therefore it is necessary to carry out temperature field analysis for LNG tank under Ultra-low temperature, and the temperature of LNG tank under Ultra-low temperature is simulated based on finite element method. Firstly, the finite element model of temperature field is analyzed. Secondly, the simulation parameters of LNG tank under Ultra-low temperature are given. Finally, the simulation results are carried out, and the temperature field of LNG tank under Ultra-low temperature is obtained.

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