Stress Modeling of Large Cylindrical Ingot Heating Process

2014 ◽  
Vol 941-944 ◽  
pp. 2393-2398
Author(s):  
Ji Ming Zheng ◽  
Xing Yong Gao
Keyword(s):  
Thermal Stress ◽  
Process Parameters ◽  
Theoretical Basis ◽  
Cylindrical Body ◽  
Stress Change ◽  
Heating Process ◽  
Research Results ◽  
Stress Modeling ◽  
Cylindrical Ingot

Discloses the variation of the thermal stress of the ingot heating process to cylindrical body ingot, for example, the thermal stress change in the heating process of the modeling obtained the variation of the axial, tangential and radial thermal stress,the research results provide a theoretical basis for the corresponding set of process parameters.

FEM Analysis of Contact for Converter Spherical Hinge

2013 ◽  
Vol 365-366 ◽  
pp. 331-334
Author(s):  
Xue Ping Ren ◽  
Jian Da Gao
Keyword(s):  
Numerical Simulation ◽  
Thermal Stress ◽  
Optimum Design ◽  
Theoretical Basis ◽  
Fem Analysis ◽  
Structure Design ◽  
Coupling Field ◽  
Main Components ◽  
Spherical Hinge

The role of converter spherical hinge is one of the main components, combined with practical work and With help of FEM, Thermal Stress coupling field of spherical washer can been obtained through numerical simulation. The result supplies substantial theoretical basis for further structure design and optimum design of mechanism.

scholarly journals Analysis of Thermal Stress during of Twin-Roll Casting of Magnesium Alloy

2012 ◽  
Vol 217-219 ◽  
pp. 1928-1933
Author(s):  
Yu Cheng Zhang ◽  
Tian Yang Han ◽  
Zheng Yi Jiang ◽  
Dong Bin Wei
Keyword(s):  
Numerical Simulation ◽  
Thermal Stress ◽  
Magnesium Alloy ◽  
Process Parameters ◽  
Element Model ◽  
Spray Angle ◽  
Thermal Cracks ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

The process of twin-roll casting including pouring, solidifying, rolling and cooling can be accomplished in a very short time. Consequently, some important process parameters in the twin-roll casting that are difficult to be obtained in experiment can be acquired using numerical simulation. In this paper, a numerical simulation based on a 2D finite element model of vertical twin-roll strip casting of magnesium alloy has been conducted, and the thermal stress fields are significantly discussed. The influences of key process parameters consisting of submerged nozzle depth and nozzle spray angle have been studied. The thermal cracks on the surface of the strip are analysed according to the thermal stress distribution.

Effect of Process Parameters on the Adsorption of Chromium VI on a Packed Bed Column (PBC) using Vetiver (Vetiveria zizanioides)

2021 ◽  
Vol 25 (12) ◽  
pp. 53-59
Author(s):  
Pejavara Narayana Gururaj ◽  
Kulathooran Ramalakshmi ◽  
Sureshkumar Sujithra ◽  
Ravichandran Shalini
Keyword(s):  
Process Parameters ◽  
Oxygen Demand ◽  
Packed Bed ◽  
Heating Process ◽  
Tannery Effluent ◽  
Vetiveria Zizanioides ◽  
Experimental Conditions ◽  
Heated Sample ◽  
Packed Bed Column ◽  
Chromium Vi

The objective of this study is to evaluate the different process parameters on adsorption of chromium VI on a packed bed column using Vetiver (Vetiveria zizanioides) and to examine the effect of pH, Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD) at a constant contact time of 10 minutes at a temperature of 40 ºC under two experimental conditions namely, tannery effluent with and without microwave treatment. The results revealed that microwave heating process had a higher impact on chromium (VI) adsorption than normal heating process. The pH values of microwave treated sample were found to be 6.65±0.65 when compared to normal heated sample where the pH was 4.62±0.72 when compared to the initial pH of effluent found to be 3.47±0.58. Further, a threefold reduction in BOD and COD values was observed in microwave treated vetiver sample which was around 86.73±1.43 and 107.90±2.82 mg/l respectively when compared to normal heated sample (250±1.45 and 200±2.65 mg/l respectively) and untreated effluent (780±2.53 and 920±3.86 mg/l respectively) which indicated the reduction of chromium VI present in the effluent water. It was also observed that the metal adsorption capacity of the vetiver powder and the adsorption characteristics were positively correlated with the FTIR and SEM analysis which confirmed the presence of chromium (VI) on the surface of vetiver.

scholarly journals Parameter Optimization and Prediction Model of Induction Heating for Large-Diameter Pipe

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Xiurong Fang ◽  
Jia Lu ◽  
Junfeng Wang ◽  
Jinhui Yang
Keyword(s):  
Prediction Model ◽  
Induction Heating ◽  
Process Parameters ◽  
Pipeline Steel ◽  
Large Diameter ◽  
Outer Wall ◽  
Design Parameters ◽  
Heating Process ◽  
Influence Of Process Parameters ◽  
Heating Device

The parameters of induction heating of large-diameter pipes have a direct effect on the final processing quality of the elbow, and the complexity of multifield coupling of magnetothermal force in induction heating can make it impossible to quantitatively optimize the design parameters of the induction heating device. In this paper, X80 pipeline steel induction heating is taken as the research object, and a corresponding numerical model is established. The influence of induction heating process parameters on the heating temperature of pipeline steel under the skin effect is determined. First, the influence of process parameters on the heating effect of pipeline steel is quantified by orthogonal test. Then, taking the optimum temperature difference between the inner and outer wall of X80 pipeline steel during the induction heating process as a target, the optimal process parameter set of the pipe induction heating is determined by using neural network genetic algorithm. Finally, comparing the relevant test criteria of the regression equation, the optimum mathematical prediction model of the outer wall temperature of the pipe induction heating process is obtained, which provides a theoretical basis for optimization of the process parameters of the pipe-based induction heating device.

P-184L: Late-News Poster: Transient Thermal Stress Modeling of the Laser Frit Sealing Process

2009 ◽  
Vol 40 (1) ◽  
pp. 1346
Author(s):  
Yabei Gu ◽  
William R. Powell ◽  
Lu Zhang ◽  
Sujanto Widjaja ◽  
Butchi R. Vaddi
Keyword(s):  
Thermal Stress ◽  
Stress Modeling ◽  
Transient Thermal Stress ◽  
Late News ◽  
Transient Thermal

scholarly journals Historical essay on the Laboratory of biochemical fundamentals of wool formation

2020 ◽  
Vol 22 (3) ◽  
pp. 26-31
Author(s):  
P. V. Stapay ◽  
◽  
N. P. Stakhiv ◽  
O. O. Smolyaninova ◽  
◽  
...  
Keyword(s):  
Chemical Composition ◽  
Theoretical Basis ◽  
Scientific Activity ◽  
Formation Processes ◽  
Scientific Journals ◽  
Metabolic Processes ◽  
Research Results ◽  
Historical Essay ◽  
Doctoral Dissertations ◽  
Practical Recommendations

The main achievements of the scientific activity of the Laboratory of Biochemical Bases of Wool Formation during the period of its existence, for 42 years (1970–2012) are presented. It is shown that during this period the laboratory developed the theoretical basis of wool formation processes, which are based on the identified patterns of relationship between the level and direction of metabolic processes in sheep, especially in the skin, with morphogenesis, structure, chemical composition and physical characteristics of wool. The research results have been widely published in various scientific journals, including foreign ones (more than 700 articles). 13 monographs and manuals, 23 methodical and one practical recommendations, several information communiqué were published, 34 dissertations were defended, including five doctoral dissertations. Scientific developments are protected by copyright certificates (five certificates) and patents of Ukraine.

scholarly journals About designing the height of the first profile of the marshalling hump

2021 ◽  
Vol 264 ◽  
pp. 05017
Author(s):  
Nurmukhammad Maxkamov ◽  
Khasan Djalilov ◽  
Khasan Kamilov
Keyword(s):  
Kinetic Energy ◽  
Theoretical Basis ◽  
High Speed ◽  
Material Point ◽  
Technical Document ◽  
Railway Transport ◽  
Research Results ◽  
Current Calculation ◽  
Free Material ◽  
Theoretical Mechanics

The Height of the high-speed section of the sorting slide. Design of high-speed section of the marshalling hump. To prove mathematically the absence of theoretical basis of the formula by which the height of the first profile section of the marshalling hump is calculated in the current calculation method of marshalling humps. The paper uses the theorem on the change of kinetic energy for a non-free material point in the final form, known from theoretical mechanics. The research results revealed that the formulas by which the height of the first profile section of the marshalling hump is calculated to contradict the theorem on the change of kinetic energy for a non-free material point in the final form. The research results can be used in the processing of the normative-technical document on the design of hump devices on railways and making adjustments to the dynamics of rolling the car in textbooks for universities of railway transport. The results of the calculations proved the incorrectness of the derivation of the formula for calculating the height of the first profile section of the marshalling hump in the normative-technical document “Rules and standards for the design of sorting devices on the railways with gauge 1 520 mm”.

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