Adaptive improved response surface method for reliability-based design optimization

Eshghi, Amin Toghi; Lee, Soo-Bum

doi:10.1080/0305215x.2018.1561885

Cited by 30 publications

(11 citation statements)

References 37 publications

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“…Response surface method (RSM) and analysis of variance (ANOVA) were used to evaluate the effect of FSW parameters, including the tool rotational speed (A), tool traverse speed (B), and tool axial force (c), on the mechanical properties. The details of RSM and ANOVA are well explained in the literature [20,21] and for the sake of briefness are not elucidated in this paper. The design matrix is illustrated in Table 1, which is based on a central composite rotatable design (CCRD).…”

Section: Methodsmentioning

confidence: 99%

Application of nanoindentation to evaluate the hardness and yield strength of brass joints produced by FSW: microstructural and strengthening mechanisms

Heidarzadeh

Paidar

Güleryüz

et al. 2020

Archiv.Civ.Mech.Eng

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Nanoindentation test was employed to measure the actual hardness and yield strength of the stir zone in the friction stirwelded single-phase brass joints. For this aim, different joints were prepared according to an experimental matrix based on the central composite rotatable design. In this design matrix, the tool rotational speed, tool traverse speed, and tool axial force were the input parameters. The outputs were the hardness and yield strength of the joints. To measure the hardness and tensile strength of the joints, the nanoindentation test was employed. Moreover, electron back scattered diffraction and transmission electron microscopy techniques were used to study the microstructural features. The results showed that by decreasing rotational speed and axial force, and by increasing the traverse speed, the hardness and yield strength of the joints were increased. In other words, lower heat inputs caused higher strength in the joints. Finer grain sizes, larger grain average misorientation amounts, i.e., existence of more dislocations, and greater Taylor factors in the lower heat input joints revealed that the influence of grain boundaries, dislocations, and texture were the origins of better mechanical properties.

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Section: Methodsmentioning

confidence: 99%

Application of nanoindentation to evaluate the hardness and yield strength of brass joints produced by FSW: microstructural and strengthening mechanisms

Heidarzadeh

Paidar

Güleryüz

et al. 2020

Archiv.Civ.Mech.Eng

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“…In this paper, Response Surface Optimization Module of Design Explorer module in ANSYS Workbench is adopted to do DOE analysis for bionic CNC turntable, and the DOE analysis method is an experimental design method [33]. During the optimization process, DOE method is used to explore the relationship between design variables and optimization objective functions of bionic CNC turntable, and combines design variables and objective functions through response surface [34]. The relationship between the design variables and objective functions can be reflected intuitively by means of curves and surfaces.…”

Section: Ansys Workbench Structural Optimization Methodsmentioning

confidence: 99%

Bionic optimization design for a CNC turntable based on thermal–mechanical coupling effect

Liu

Mao

2020

J Braz. Soc. Mech. Sci. Eng.

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During the machining process, the thermal-mechanical coupling effect of CNC turntable is produced by the action of variable loads and various heat sources. In order to improve the static and dynamic characteristics under thermal-mechanical coupling effect, a novel bionic optimization design method for CNC turntable was proposed. The finite element modal analysis on a CNC turntable was carried out to obtain the weak link of its dynamic characteristics, and the thermal-mechanical coupling analysis on the CNC turntable was conduct to reveal the influence of the thermal-mechanical coupling effect on the dynamic characteristics of the CNC turntable. In view of the good mechanical properties of Victoria amazonica, bionic design for the CNC turntable was carried out based on the strong similarity of structure and function. The optimization objectives and design variables of bionic CNC turntable were selected according to the thermal-mechanical coupling and modal analysis results, and the influence law of the design variables on the optimization objectives was studied by sensitivity analysis method. The optimal solution to bionic CNC turntable was obtained through response surface optimization, which made the maximum deformation was reduced by 2.37%, the mass was reduced by 15.60%, and the first six order natural frequencies were increased. The feasibility of the proposed bionic optimization design method for CNC turntable was verified through comparing the first six order natural frequencies of modal experimental results with optimization results. Therefore, the bionic optimization method provides a new idea for structural design of CNC machine tools' parts to improve the static and dynamic characteristics.

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“…The obtained results are shown in Fig 6. The RMS (Response Surface Methodology) [9] analysis shows the influence of the welding parameters on the strength of the FSW joint (UTS) depending on the used tool (Fig. 7).…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

Friction Stir Welding of Thin Sheets of the AA2024-T3 Alloy with a Ceramic Tool: RSM and ANOVA Study

Myśliwiec

Śliwa

2022

KEM

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In this study a new ceramics tools with different groove distributions were designed and manufactured in order to enrich technological storage of joining thin-wall structures and obtain sound joint with high quality of alclad AA2024-T3 alloy of 0.5 mm in thickness. Four types of tools were tested, without grooves, with 1, 2 and 6 grooves. The tools are made of two materials. The straight shank is made from tungsten carbide and tool body made from ceramics strengthened with whiskers. The influence of technological parameters on the strength of FSW joints was tested by the RSM (Response Surface Methodology) and ANOVA (analysis of variance) method. The least durable weld is produced by a tool without grooves. The 1 and 2-flute tool produces a good quality weld over a wide range of tool speeds. It has been shown that the grooves on the tool shoulder significantly affect the quality of the obtained FSW joint.

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Adaptive improved response surface method for reliability-based design optimization

Cited by 30 publications

References 37 publications

Application of nanoindentation to evaluate the hardness and yield strength of brass joints produced by FSW: microstructural and strengthening mechanisms

Application of nanoindentation to evaluate the hardness and yield strength of brass joints produced by FSW: microstructural and strengthening mechanisms

Bionic optimization design for a CNC turntable based on thermal–mechanical coupling effect

Friction Stir Welding of Thin Sheets of the AA2024-T3 Alloy with a Ceramic Tool: RSM and ANOVA Study

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