CFD modeling and experimental study of resin-bonded sand/air two-phase flow in sand coremaking process

Bakhtiyarov, Sayavur I.; Overfelt, Ruel A.

doi:10.1016/s0032-5910(03)00081-0

Cited by 16 publications

(15 citation statements)

References 3 publications

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“…Instead of conducting experiments, some researchers had used the simulation softwares to study the physical system. Bakhtiyarov and Overfelt [11] presented the experimental results of resin bonded sand system with air flow in the square core box. They also compared these results with the results obtained from the numerical simulations.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Resin Bonded Sand Mould System Using Design of Experiments and Central Composite Design

Surekha

Rao²,

Rao

et al. 2012

Journal for Manufacturing Science and Production

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In this paper an attempt has been made for linear and non linear modeling of resin bonded sand mould system using full factorial design of experiments and response surface methodology, respectively. It is important to note that the quality of castings produced using the resin bonded sand mould system depends largely on properties of moulds, which are influenced by the characteristics of sand, like type of sand, grain fineness number, grain size distribution and quantity and type of resin, catalyst, curing time etc. In the present study, percentage of resin, percentage of hardener, number of strokes and curing time are considered as input parameters and the mould properties, such as compression strength, shear strength, tensile strength and permeability are treated as responses. In the present work, phenol formaldehyde is used as the resin whereas tetrahydrophthalic anhydride as the hardener. A two level full factorial and three level central composite designs are utilized to develop input-output relationships. Surface plots and main effects plots are used to study the effects of amount of resign, amount of hardener, number of strokes and curing time on the responses, namely, compression strength, tensile strength, shear strength and permeability. Moreover, the adequacies of the developed models have been tested using analysis of variance. The prediction accuracy of the developed models have been tested with the help of twenty test cases and found reasonably good accuracy.

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Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Resin Bonded Sand Mould System Using Design of Experiments and Central Composite Design

Surekha

Rao²,

Rao

et al. 2012

Journal for Manufacturing Science and Production

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“…The blowing process [1][2][3][4][5][6][7][8] of molding sand compaction and its hardening (during which, a sand-air flux is introduced into a mold cavity and followed by successive flows of air and a hardening factor -one after another -into venting holes) is burdened with at least two disadvantages. The first one constitutes the diversification of the molding sand compaction within the core volume, especially visible when the sand is shot through individual shooting holes, since it leads to a significantly higher apparent density in the shooting hole axis.…”

Section: Introductionmentioning

confidence: 99%

Density Distribution and Resin Migration Investigations in Samples of Sand Core Made by Blowing Method

Dańko

Jamrozowicz

2017

jcme

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Resin migration in a core can occur during the core production process performed by blowing methods in which the core sand is transported into the core box as a two-phase sand-air flux characterized by various working parameters (working pressure, shooting time, volumetric concentration). This migration is the result of the resin being blown off from the matrix grain surfaces by compressed air. The methodology of the investigation of this effect developed at AGH University of Science and Technology is presented in this paper. The results of the resin migration tests obtained for cores made with cold-box technology at various working parameters of the shooting process are also shown.

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“…The experimental results at room temperature showed a difference in tensile and compression strength, where compression strength was found to be much higher. It is interesting to note that instead of conducting experiments, some researchers had used the simulation software [2,13,19] to study the physical system.…”

Section: Introductionmentioning

confidence: 99%

Prediction of resin bonded sand core properties using fuzzy logic

Surekha¹,

Rao²,

Rao

et al. 2013

Journal of Intelligent &Amp; Fuzzy Systems

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This paper introduces an intelligent system for the prediction of mechanical properties of silica-based resin bonded sand core system. The properties of sand cores, such as tensile strength, compression strength, shear strength and permeability depends upon various process parameters, namely percentage of resin, of hardener, number of strokes and curing time. In the present paper, Mamdani-based fuzzy logic (FL) approach is used to perform forward modeling, in which the outputs are expressed as the functions of input variables. Moreover, the performance of FL system depends on the knowledge base (KB), which consists of rule base and data base. Three different approaches have been developed in the present work. Manually constructed FL system is developed in the first approach, whereas in approach 2, genetic algorithm (GA) is used to optimize the data base and rule base of FL system developed in Approach 1. On the other hand in Approach 3, automatic evolution of rule is considered along with the use of GA to optimize data base and rule base. It is important to note that the developed fuzzy model uses triangular membership functions for fuzzification and centroid area method for de-fuzzification process. The developed FL system eliminates the need of extensive experimental work in selecting the most influential process parameters. The performances of all three approaches have been tested with the help of twenty test cases. It is to be noted that all three approaches, developed can be effectively used in foundry for making prediction. The results showed that the Approach 3 has outperformed the remaining two, in terms of prediction accuracy.

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CFD modeling and experimental study of resin-bonded sand/air two-phase flow in sand coremaking process

Cited by 16 publications

References 3 publications

Modeling and Analysis of Resin Bonded Sand Mould System Using Design of Experiments and Central Composite Design

Modeling and Analysis of Resin Bonded Sand Mould System Using Design of Experiments and Central Composite Design

Density Distribution and Resin Migration Investigations in Samples of Sand Core Made by Blowing Method

Prediction of resin bonded sand core properties using fuzzy logic

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