Numerical Studies on Temperature and Material Flow During Friction Stir Welding using Different Tool Pin Profiles

Bindu, M; Tide, P. S.; Bhasi, Anjana

doi:10.37934/arfmts.83.1.91104

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…With the success of our strategies involved in the proposed model and method, we believe that these results could be extended further in other fluid mechanics and heat transfer areas as well as initial-boundary value problems. One could implement our strategies to various problems (to mention some of them, see Alawi and Kamar [19], Bindu et al, [20], Ewis [21], Ferdows et al, [22], Ghani and Jami [23], Giap and Kosuke [24], Jamil et al, [25], Mohamed et al, [26], Sahak et al, [27] and the work of Mungkasi [28,29] as well as Mungkasi and Roberts [30]). Each of these problems could be explored and solved in their own rights.…”

Section: Results and Discussion For The Proposed Modelmentioning

confidence: 99%

Modelling And Simulation of Topical Drug Diffusion in The Dermal Layer of Human Body

Mungkasi

2021

ARFMTS

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We consider the problem of drug diffusion in the dermal layer of human body. Two existing mathematical models of the drug diffusion problem are recalled. We obtain that the existing models lead to inconsistent equations for the steady state condition. We also obtain that solutions to the existing models are unrealistic for some cases of the unsteady state condition, because negative drug concentrations occur due to the inappropriate assumption of the model. Therefore, in this paper, we propose a modified mathematical model, so that the model is consistent, and the solution is nonnegative for both steady and unsteady state conditions of the drug diffusion problem in the dermal layer of human body. For the steady state condition, the exact solution to the proposed model is given. For unsteady state condition, we use a finite difference method for solving the models numerically, where the discretisation is centred in space and forward in time. Simulation results confirm that our proposed model and method preserve the non-negativity of the solution to the problem, so the solution is more realistic than that of the old model.

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Section: Results and Discussion For The Proposed Modelmentioning

confidence: 99%

Modelling And Simulation of Topical Drug Diffusion in The Dermal Layer of Human Body

Mungkasi

2021

ARFMTS

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“…tools and machine cost, manpower, time, material, waste production and management), to obtain the component with the best performance [14]. Thus, studies are actively conducted both experimentally and numerically [14][15][16][17] to explain the association. Therefore, it is necessary to understand how the heat input changes the formation of the microstructure and mechanical characteristics in the CGHAZ area, which is an area with a high probability of experiencing a defect and connect it to the material's mechanical properties to reduce the occurrence of defects in the CGHAZ area.…”

Section: Introductionmentioning

confidence: 99%

Effect of Welding Heat Input on the Mechanical Properties of Mild Steel at Coarse Grain Heat Affected Zone (CGHAZ)

Yusra Solehah Suwandi,

Saifulnizan Jamian,

Dalila Mohd Harun

et al. 2024

ARAM

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Welding is a joining method often used in industry, especially involving mild steel. Welded areas have a high probability of failure, especially if there are defects because of the welding process. Therefore, the welding area known as the Coarse Grain Heat Affected Zone (CGHAZ) needs to be given high attention. The heat input value is the main factor that shapes the microstructure changes in the CGHAZ area. This change in microstructure results in a change in the mechanical properties of the material. In this study, the effect of heat input using the Gas Metal Arc Welding (GMAW) method on the microstructure and mechanical properties of mild steel is studied. Nine different heat input values are used by setting a combination of current (50 A, 100 A and 150 A) and voltage (15 V, 20 V and 25 V). Observations in the CGHAZ area were carried out using an optical microscope (OM). The presence of Austenite, Grain Boundary Ferrite (GBF), Widmannstetter Ferrite (WF), Acicular Ferrite, Pearlite (P), Ferrite, Cementite, Upper Bainite, Lower Bainite and Martensite phases are observed in CGHAZ. Vickers hardness test and Charpy impact test were also performed to see the change in the mechanical properties of the material. It was found that the hardness and toughness values decrease with increasing heat input values. It can be concluded that a higher heat input causes a larger grain size of the microstructure in the CGHAZ part, which causes a reduction in the hardness and toughness values of the material. In addition, it also increases the probability of cracking and reduces the integrity of the overall structure.

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Simulation of Dissimilar (Al1100-Cu) Friction Stir Welding Using Convection Coefficient Between Workpiece and Backing Plate Based on Its Deformation

Robbany,

Darmadi,

Irawan

et al. 2024

J. Adv. Res. Numer. Heat Trans.

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Friction stir welding is considered a solution to conventional welding issues, particularly when dissimilar materials are involved. The implication of complex phenomena encourages researchers to utilize numerical simulations in their research. Despite the backing plate being the most significant cause of heat loss, researchers tend to simplify the heat transfer coefficient to the backing plate without considering the deformation pattern of the workpiece. The pressure applied by the tool increases the contact conductance between the workpiece and the backing plate, influencing heat transfer coefficient distribution. This paper aims to model the FSW process involving the deformation of the workpiece. A backing plate in the form of asbestos is employed to capture the deformation of the workpiece on an experimental test. Quadratic polynomial equations are used as an approach to measuring deformation patterns. Based on the results of this study, the coefficient convection distribution based on the deformation pattern produced a temperature history close to the experimental results. Validation of material flow in the model was also carried out.

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Numerical Studies on Temperature and Material Flow During Friction Stir Welding using Different Tool Pin Profiles

Cited by 3 publications

References 17 publications

Modelling And Simulation of Topical Drug Diffusion in The Dermal Layer of Human Body

Modelling And Simulation of Topical Drug Diffusion in The Dermal Layer of Human Body

Effect of Welding Heat Input on the Mechanical Properties of Mild Steel at Coarse Grain Heat Affected Zone (CGHAZ)

Simulation of Dissimilar (Al1100-Cu) Friction Stir Welding Using Convection Coefficient Between Workpiece and Backing Plate Based on Its Deformation

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