Numerical analysis of temperature distribution and material deformation of thin foils in micro metal forming assisted by resistance heating

2013 ◽  
Author(s):  
Q. Zheng ◽  
T. Shimizu ◽  
M. Yang
Keyword(s):  
Temperature Distribution ◽  
Numerical Analysis ◽  
Metal Forming ◽  
Resistance Heating ◽  
Material Deformation ◽  
Thin Foils

scholarly journals Effect of lubrication and friction coefficient on temperature distribution for combined backward forward extrusion process for alloy steel

2018 ◽  
Vol 1 (1) ◽  
pp. 352-357
Author(s):  
Ban Alamer ◽  
Çetin Karataş ◽  
Faruk Mert ◽  
Haitham Aljawad
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temperature Distribution ◽  
Numerical Analysis ◽  
Friction Coefficient ◽  
Friction Factor ◽  
Metal Forming ◽  
Extrusion Process ◽  
Forward Extrusion ◽  
Friction Factors

During extrusion process ,the effects of friction between die and workpiece are important and it is one of the most serious problems in metal forming. Friction factor has different effects depending on the size of workpiece. In this study the effect of friction factor and lubrication effects on temperature distribution , power , and load for combined backward forward extrusion process was demonstrated . A numerical analysis based on finite element method by using Q form program was used to study the effect of friction factor through two type of condition , first for lubrication three values for friction factor were used ( 0.1, 0.2 ,0.3 ) .The second condition was un lubrication , the friction factors values were (0.25 , 0.5 ,0.75) . The material of specimen was steel C45.The parts to be manufactured was wrench socket and the lubrication was done by using water and graphite .The results showed that for lubricated and un lubricated conditions , the temperatures power and load were increased when the friction factor increased .

Numerical Analysis of Temperature Distribution in the Long DC Arc Thermal Plasma for Waste Treatment

2013 ◽  
Vol 46 (3) ◽  
pp. 201-208 ◽  
Author(s):  
Sooseok Choi ◽  
TianMing Li ◽  
Takayuki Watanabe ◽  
Takashi Nakayama ◽  
Koji Otsuki
Keyword(s):  
Temperature Distribution ◽  
Numerical Analysis ◽  
Thermal Plasma ◽  
Waste Treatment ◽  
Dc Arc

Embedded resistive heating in composite scarf repairs

2016 ◽  
Vol 51 (18) ◽  
pp. 2575-2583 ◽  
Author(s):  
Mahdi Ashrafi ◽  
Brandon P Smith ◽  
Santosh Devasia ◽  
Mark E Tuttle
Keyword(s):  
Temperature Distribution ◽  
Outer Surface ◽  
Thermal Gradient ◽  
Thermal Damage ◽  
Electrical Current ◽  
Tensile Tests ◽  
Resistance Heating ◽  
Uniform Temperature ◽  
Uniform Temperature Distribution ◽  
Bond Strengths

Composite scarf repairs were cured using heat generated by passing an electrical current through a woven graphite-epoxy prepreg embedded in the bondline. Resistance heating using the embedded prepreg resulted in a more uniform temperature distribution in the bondline while preventing any potential thermal damage to the surface of the scarf repairs. In contrast, conventional surface heating methods such as heat blankets or heat lamps lead to large through thickness thermal gradient that causes non-uniform temperature in the bondline and overheating the outer surface adjacent to the heater. Composite scarf repair specimens were created using the proposed embedded heating approach and through the use of a heat blanket for circular and rectangular scarf configurations. Tensile tests were performed for rectangular scarf specimens, and it was shown that the bond strengths of all specimens were found to be comparable. The proposed embedded curing technique results in bond strengths that equal or exceed those achieved with external heating and avoids overheating the surface of the scarf repairs.

scholarly journals Thermal characterization of a plate heated by a multi-jet system

2018 ◽  
Vol 19 (5) ◽  
pp. 503
Author(s):  
Amar Zerrout ◽  
Ali Khelil ◽  
Larbi Loukarfi
Keyword(s):  
Temperature Distribution ◽  
Numerical Analysis ◽  
Flat Plate ◽  
Turbulence Model ◽  
Thermal Characterization ◽  
Experimental Results ◽  
Experimental Device ◽  
Inlet Temperature ◽  
Thermal Transfer

This study is an experimental and numerical analysis of the influence from changes in the conditions of inputs temperature and velocity on the behavior thermal and dynamic of a multi-jet swirling system impacting a flat plate. The experimental device comprising three diffusers arranged in line, of diameter D aloof 2D between the axes of their centers, impinging the plate perpendicularly at an impact height H = 6D. The swirl is obtained by a generator (swirl) of composed 12 fins arranged at 60° relative to the vertical placed just at the exit of the diffuser. By imposing the temperature and velocity for three input conditions with three studied configurations. The paper deals with find the configuration that optimizes the best thermal homogenization. The results show that the configuration having an equilibrated inlet temperature (T, T, T) is derived from a good temperature distribution on the baffle wall and a better thermal transfer from the plate. The system was numerically simulated by the fluent code by using the turbulence model (k–ε). This last has yielded results accorded to those experimental results.

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