The Experts below are selected from a list of 2322 Experts worldwide ranked by ideXlab platform
Tushar Goel - One of the best experts on this subject based on the ideXlab platform.
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multi objective evolutionary algorithms for engineering shape design
2003Co-Authors: Kalyanmoy Deb, Tushar GoelAbstract:Evolutionary optimization algorithms work with a population of solutions, instead of a single solution. Since multi-objective optimization problems give rise to a set of Pareto-optimal solutions, evolutionary optimization algorithms are ideal for handling multi-objective optimization problems. Many years of research and application studies have produced a number of efficient multi-objective evolutionary algorithms (MOEAs), which are ready to be applied to real-world problems. In this paper, we propose a practical approach, which will enable an user to find a set of non-dominated solutions closer to the true Pareto-optimal front and simultaneously reduce the size of the obtained non-dominated solution set. The efficacy of the proposed approach is demonstrated in solving a number of mechanical shape optimization problems, including a simply-supported plate design, a cantilever plate design, a hoister design, and a Bicycle Frame design. The results are interesting and suggest immediate application of the prop osed technique to more complex engineering design problems.
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a hybrid multi objective evolutionary approach to engineering shape design
International Conference on Evolutionary Multi-criterion Optimization, 2001Co-Authors: Kalyanmoy Deb, Tushar GoelAbstract:Evolutionary optimization algorithms work with a population of solutions, instead of a single solution. Since multi-objective optimization problems give rise to a set of Pareto-optimal solutions, evolutionary optimization algorithms are ideal for handling multi-objective optimization problems. Over many years of research and application studies have produced a number of efficient multi-objective evolutionary algorithms (MOEAs), which are ready to be applied to real-world problems. In this paper, we propose a practical approach, which will enable an user to move closer to the true Pareto-optimal front and simultaneously reduce the size of the obtained non-dominated solution set. The efficacy of the proposed approach is demonstrated in solving a number of mechanical shape optimization problems, including a simply-supported plate design, a cantilever plate design, a hoister design, and a Bicycle Frame design. The results are interesting and suggest immediate application of the proposed technique in more complex engineering design problems.
Kalyanmoy Deb - One of the best experts on this subject based on the ideXlab platform.
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multi objective evolutionary algorithms for engineering shape design
2003Co-Authors: Kalyanmoy Deb, Tushar GoelAbstract:Evolutionary optimization algorithms work with a population of solutions, instead of a single solution. Since multi-objective optimization problems give rise to a set of Pareto-optimal solutions, evolutionary optimization algorithms are ideal for handling multi-objective optimization problems. Many years of research and application studies have produced a number of efficient multi-objective evolutionary algorithms (MOEAs), which are ready to be applied to real-world problems. In this paper, we propose a practical approach, which will enable an user to find a set of non-dominated solutions closer to the true Pareto-optimal front and simultaneously reduce the size of the obtained non-dominated solution set. The efficacy of the proposed approach is demonstrated in solving a number of mechanical shape optimization problems, including a simply-supported plate design, a cantilever plate design, a hoister design, and a Bicycle Frame design. The results are interesting and suggest immediate application of the prop osed technique to more complex engineering design problems.
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a hybrid multi objective evolutionary approach to engineering shape design
International Conference on Evolutionary Multi-criterion Optimization, 2001Co-Authors: Kalyanmoy Deb, Tushar GoelAbstract:Evolutionary optimization algorithms work with a population of solutions, instead of a single solution. Since multi-objective optimization problems give rise to a set of Pareto-optimal solutions, evolutionary optimization algorithms are ideal for handling multi-objective optimization problems. Over many years of research and application studies have produced a number of efficient multi-objective evolutionary algorithms (MOEAs), which are ready to be applied to real-world problems. In this paper, we propose a practical approach, which will enable an user to move closer to the true Pareto-optimal front and simultaneously reduce the size of the obtained non-dominated solution set. The efficacy of the proposed approach is demonstrated in solving a number of mechanical shape optimization problems, including a simply-supported plate design, a cantilever plate design, a hoister design, and a Bicycle Frame design. The results are interesting and suggest immediate application of the proposed technique in more complex engineering design problems.
Thomas Jinchee Liu - One of the best experts on this subject based on the ideXlab platform.
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fiber direction and stacking sequence design for Bicycle Frame made of carbon epoxy composite laminate
Materials & Design, 2010Co-Authors: Thomas Jinchee LiuAbstract:Abstract According to the maximum stress theory and the results of strength-to-stress ratios, the fiber direction and stacking sequence design for the Bicycle Frame made of the carbon/epoxy composite laminates have been discussed in this paper. Three testing methods for the Bicycle Frame, i.e. torsional, frontal, and vertical loadings, are adopted in the analysis. From the finite element results, the stacking sequences [0/90/90/0] s and [0/90/45/−45] s are the good designs for the composite Bicycle Frames. On the contrary, the uni-directional laminates, i.e. [0/0/0/0] s , [90/90/90/90] s , [45/45/45/45] s and [−45/−45/−45/−45] s , are the bad designs. In addition, weak regions of failure occur at the fillets and connections of the Frame, i.e. the stress concentration regions. All weak points occur at the inner or outer layer of the laminated composite tube. The 0°-ply and 90°-ply located on the inner and outer layer of the tube can effectively resist the higher stress at its location.
Profota Martin - One of the best experts on this subject based on the ideXlab platform.
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Stress, deformation and safety analysis of the tandem Bicycle Frame
Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014Co-Authors: Profota MartinAbstract:Purpose of this work was the evaluation safety and pliancy of the Frame structure tandem Bicycle using method of basic elasticity with the help of the deformation and stress analysis. After introduction material and geometry of the Frame tandem Bicycle introductory part is focused on theoretical basis of calculation like beam assumptions, definition the beam, limit states, Sentence of Castigliano and Saint Venant's Principle. Before commencement actual analytical solution the spatial task was transferred to plane task and used model was simplified. Calculation related to two load states differing by way of load of Frame tandem Bicycle. For each load modes comparison with numerical solution by FEM was enabled. Mathematical software like Mathcad 14 and Maple 13 were used to analytical calculation. Check was performed by numerical solution in program ANSYS Workbench 14.5
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Stress, deformation and safety analysis of the tandem Bicycle Frame
Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014Co-Authors: Profota MartinAbstract:Cílem této práce bylo posouzení bezpečnosti a poddajnosti konstrukce rámu tandemového kola využitím prosté pružnosti pomocí výpočtové deformační a napěťové analýzy. Po seznámení s materiálem a geometrií rámu dvojkola je úvodní část věnována teoretickému základu výpočtu, jako prutové předpoklady, definice prutu, mezní stavy, Castiglianova věta a Saint-Venantův princip. Před zahájením samotného analytického řešení se převedla daná prostorová úloha na rovinnou a provedlo se celkové zjednodušení výpočtového modelu. Výpočet se týkal dvou zátěžných stavů vzájemně se odlišujících způsobem namáhání tandemového rámu. U každého zátěžového módu bylo umožněno srovnání s numerickým přístupem MKP. Při analytickém výpočtu se využilo matematických softwarů Mathcad 14 a Maple 13. Kontrola numerickým řešením proběhla v programu ANSYS Workbench 14.5.Purpose of this work was the evaluation safety and pliancy of the Frame structure tandem Bicycle using method of basic elasticity with the help of the deformation and stress analysis. After introduction material and geometry of the Frame tandem Bicycle introductory part is focused on theoretical basis of calculation like beam assumptions, definition the beam, limit states, Sentence of Castigliano and Saint Venant's Principle. Before commencement actual analytical solution the spatial task was transferred to plane task and used model was simplified. Calculation related to two load states differing by way of load of Frame tandem Bicycle. For each load modes comparison with numerical solution by FEM was enabled. Mathematical software like Mathcad 14 and Maple 13 were used to analytical calculation. Check was performed by numerical solution in program ANSYS Workbench 14.5.
Linda Jakub - One of the best experts on this subject based on the ideXlab platform.
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Utilization of carbon fibre for construction of elastic elements of mountain bike rear triangle
Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018Co-Authors: Linda JakubAbstract:The aim of the thesis is to design a carbon elastic element in the suspension mechanism of the rear wheel of a mountain bike. The elastic element will replace the rotary link and its deformation will allow movement of the rear wheel suspension mechanism. At the beginning, the thesis deals with the theoretical introduction to Bicycle geometry, types of rear wheel suspension mechanisms and their characteristics. Later on, the work is devoted to composite materials in general, and it also deals with methods of manufacturing a composite Bicycle Frame and deals with the mechanics of composites. Further, the thesis is focused on the research of already existing Frames utilizing the flexible element in the suspension mechanism of the rear wheel. Finally, the work focuses on the design of a full-suspension Bicycle using a flexible element, justifies the choice of the replaced suspension mechanism and also justifies the individual simplifying assumptions and their impact on the solution. The elastic element is analyzed for deformations and stresses in the Ansys software. Finally, the results of the analysis and recommendations are presented
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Utilization of carbon fibre for construction of elastic elements of mountain bike rear triangle
Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018Co-Authors: Linda JakubAbstract:Cieľom práce je návrh karbónového pružného prvku v mechanizme odpruženia zadného kolesa horského bicykla. Pružný prvok bude nahrádzať rotačnú väzbu a svojou deformáciou bude umožňovať pohyb mechanizmu odpruženia zadného kolesa. Na počiatku sa práca zaoberá teoretickým úvodom do problematiky geometrie bicykla, typov mechanizmov odpruženia zadného kolesa a ich charakteristikám. Neskôr sa práca venuje kompozitným materiálom vo všeobecnosti, tiež sa venuje metódam výroby kompozitných cyklistických rámov a zaoberá sa aj mechanike kompozitov. Ďalej sa práca zameriava na rešeršnú štúdiu už existujúcich rámov využívajúcich pružný prvok v mechanizme odpruženia zadného kolesa. Ku koncu sa práca zameriava na vlastný návrh celoodpruženého bicykla s využitím pružného prvku, zdôvodňuje dané voľby pri voľbe nahrádzaného mechanizmu odpruženia a tiež zdôvodňuje jednotlivé zjednodušujúce predpoklady a ich vplyv na riešenie. Daný pružný prvok je analyzovaný z hľadiska deformácií a napätí v softwary Ansys. Na záver sú uvedené výsledky analýzy a odporučenia.The aim of the thesis is to design a carbon elastic element in the suspension mechanism of the rear wheel of a mountain bike. The elastic element will replace the rotary link and its deformation will allow movement of the rear wheel suspension mechanism. At the beginning, the thesis deals with the theoretical introduction to Bicycle geometry, types of rear wheel suspension mechanisms and their characteristics. Later on, the work is devoted to composite materials in general, and it also deals with methods of manufacturing a composite Bicycle Frame and deals with the mechanics of composites. Further, the thesis is focused on the research of already existing Frames utilizing the flexible element in the suspension mechanism of the rear wheel. Finally, the work focuses on the design of a full-suspension Bicycle using a flexible element, justifies the choice of the replaced suspension mechanism and also justifies the individual simplifying assumptions and their impact on the solution. The elastic element is analyzed for deformations and stresses in the Ansys software. Finally, the results of the analysis and recommendations are presented.