Optimization of geometric parameters in a welded joint through response surface methodology

Martínez-Conesa, Eusebio; Egea, José A.; Miguel, V.; Toledo, Carlos Juárez; Meseguer-Valdenebro, José L.

doi:10.1016/j.conbuildmat.2017.07.163

Cited by 40 publications

(12 citation statements)

References 20 publications

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“…In BBD, only three levels of process parameter have been required to run the experiment, and also, there are no points that lie on the vertices of the experimental vicinity. This is the main characteristic of the BBD method [30][31][32][33]. In Box-Behnken design, there are fewer design points than central composite designs which are less expensive to run with the same number of factors.…”

Section: Response Surface Methodologymentioning

confidence: 99%

Optimization of process parameters of direct metal laser sintering process using fuzzy-based desirability function approach

Gajera

Dave

Darji

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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CL50WS material has been mainly used in tooling industries for making die, tool insert, mould or casting die. As the manufacturing of the CL50WS material parts from the DMLS machine differs from the conventional machining process, it is very essential to understand of DMLS behaviour and determine the proper optimal process parameter. Hence, the present study highlights the application of Box-Behnken method (BBD) of response surface methodology with fuzzy-based desirability function approach in order to optimize the multiple process parameters of direct metal laser sintering. The study also focused to investigate the effects of process parameters, viz. the laser power, scanning speed, layer thickness and hatch spacing, on the performance characteristics such as surface roughness, hardness and impact strength for the fabricated specimen using response surface plot. Fuzzy inference system has been applied in order to aggregate the aforementioned performance characteristics into a single objective response, i.e. multi-performance characteristic index. The optimum values of process parameters such as laser power 130 W, scan speed 550 mm/sec, layer thickness 0.03 mm and hatch spacing of 0.010 mm have been observed in the present study.

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Section: Response Surface Methodologymentioning

confidence: 99%

Optimization of process parameters of direct metal laser sintering process using fuzzy-based desirability function approach

Gajera

Dave

Darji

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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“…This technique was introduced by Box and Wilson in 1951. They suggested second order degree polynomials to approximate the relationships, although there are other functional forms to apply RSM [12]. Response surface methodology was used to explore the relation between the feed rate, speed, tool pin offset and axial force as input variables and UTS, impact strength and volumetric dispersion as response variables.…”

Section: Response Surface Methods (Rsm)mentioning

confidence: 99%

An Application of CCD in RSM to Obtain Optimize Treatment of Eccentric-Weave Friction Stir Welding Between Polyether-Ether-Ketone Polymer and AA 6061-T6 with Reinforced Multiwall

Prabhu¹,

Tjprc²

2018

IJMPERD

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The heat treatment of aluminium-PEEK (poly-ether-ether-ketone) alloy finds wide application in the aerospace and defence industry for its effective rate in strength to weight ratio and for good ductility. Friction Stir Welding (FSW) process (an emerging solid state joining process) is suitable for joining this alloy compared to fusion welding processes. The most significant process parameters are tool speed, feed rate, tool pin offset and axial force. By using central composite design and by employing Response Surface Methodology (RSM), regression models were developed to predict the responses. The mechanical properties, such as Ultimate Tensile Strength (UTS), impact strength and volumetric dispersion are considered as responses.

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“…According to the characteristics of each area in the welded structure, it is known that the welded joint consists of welded line and heat affected zone (HAZ). [ 39 ] Among them, the coarse crystal zone of partial roasting zone and heat‐affected zone is usually the weak part in the joint, which is usually discontinuous in performance and prone to stress concentration and crack. The welded heat affected zone of welded joints of steel structures is as wide as tens of millimeters, and the strength of base metal in HAZ decreases significantly.…”

Section: Analysis Model and Definition Of Joint Damagementioning

confidence: 99%

Robustness analysis of vertical resistance to progressive collapse of diagrid structures in tall buildings

Liu

Fang

2020

Structural Design Tall Build

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In order to investigate the vertical resistance to progressive collapse and the evolution of its robustness in the process of loading, a quantitative method of the robustness index of diagrid structure is established based on the mechanical properties of the components and the vertical bearing capacity of the structure. A scale experiment model of diagrid tube structure is established in laboratory which verified the availability of the proposed robustness quantification method. Results demonstrated that, the axial force of inclined column is pressure, and the axial force of ring beam is tension under vertical load. The ring beam is the main restraint to the side bulge of the diagrid structure. The welded strength of the inclined column have great influence on the vertical bearing capacity, so it is necessary to consider the reduction of the strength of welded joint. The influence of the welding line of the joint can lead to the plastic stage of the local components of the structure, which makes the structural robustness worse. In addition, the experimental study and numerical simulation results verify that the proposed method of robustness coefficient quantification for diagrid tube structure can accurately and reasonably evaluate the resistance of vertical progressive collapse performance.

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Optimization of geometric parameters in a welded joint through response surface methodology

Cited by 40 publications

References 20 publications

Optimization of process parameters of direct metal laser sintering process using fuzzy-based desirability function approach

Optimization of process parameters of direct metal laser sintering process using fuzzy-based desirability function approach

An Application of CCD in RSM to Obtain Optimize Treatment of Eccentric-Weave Friction Stir Welding Between Polyether-Ether-Ketone Polymer and AA 6061-T6 with Reinforced Multiwall

Robustness analysis of vertical resistance to progressive collapse of diagrid structures in tall buildings

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