The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform
Zamazal Jakub - One of the best experts on this subject based on the ideXlab platform.
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Reconstruction of middle part of the fuselage Z 143 aircraft using semi- Monocoque frame
Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017Co-Authors: Zamazal JakubAbstract:The thesis is focused on reconstruction of middle part of fuselage Z 143 aircraft from truss frame to semi-Monocoque frame. In the thesis there is a conceptual design of semi-Monocoque middle part of fuselage. The spars of centre wing section are strength controlled. In thesis there is weight analysis according to use the semi-Monocoque middle part of fuselage. In second half of the thesis there is a study of retractable landing gear. The thesis shows weight savings according to use a semi-Monocoque frame. The thesis also shows that semi-Monocoque frame allows other option to upgrade Z 143 aircraft. This thesis can serve as a feasibility study of the reconstruction of the middle part of the fuselage Z 143 aircraft
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Reconstruction of middle part of the fuselage Z 143 aircraft using semi- Monocoque frame
Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017Co-Authors: Zamazal JakubAbstract:Diplomová práce se zabývá rekonstrukcí střední části trupu letounu Z 143 z příhradové konstrukce na konstrukci poloskořepinovou. V práci je proveden koncepční návrh poloskořepinové střední části trupu, přičemž nosníky centroplánu jsou pevnostně dimenzovány a kontrolovány. V práci je proveden hmotnostní rozbor a výpočet centráží letounu s navrhovanou poloskořepinovou konstrukcí. V druhé půli práce je provedna studie možného konstrukčního řešení zatahovacího podvozku. Práce ukazuje, že použitím poloskořepinové konstrukce je možno ušetřit hmotnost letounu a tato konstrukce také otevírá možnosti v dalším vylepšování letounu Z 143. Tato práce tedy může sloužit jako studie proveditelnosti přestavby střední části trupu letounu Z 143.The thesis is focused on reconstruction of middle part of fuselage Z 143 aircraft from truss frame to semi-Monocoque frame. In the thesis there is a conceptual design of semi-Monocoque middle part of fuselage. The spars of centre wing section are strength controlled. In thesis there is weight analysis according to use the semi-Monocoque middle part of fuselage. In second half of the thesis there is a study of retractable landing gear. The thesis shows weight savings according to use a semi-Monocoque frame. The thesis also shows that semi-Monocoque frame allows other option to upgrade Z 143 aircraft. This thesis can serve as a feasibility study of the reconstruction of the middle part of the fuselage Z 143 aircraft.
Rifky Ismail - One of the best experts on this subject based on the ideXlab platform.
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The effect of load and thickness variation on stress analysis of Monocoque frame of electric city car using FEM
2017Co-Authors: Agus Makhrojan, Agus Suprihadi, Sigit Setijo Budi, Jamari Jamari, Rifky IsmailAbstract:The electric car is transportation which growing and constantly put through improvisation vehicle design. One of the structural components of the electric car which holds a major role is a frame. The purpose of this study is to get Monocoque frame design which lightweight and powerful for a city car with two passengers that was able to improve the efficiency of the battery voltage source. Monocoque frame should be able to accept the normal loads such as the weight of batteries, passenger, and body. The most important thing, Monocoque frame should also be able to protect the driver and passengers in the event of a collision. Mild steel was chosen for the design because it is easy to obtain and reasonable price as well as easy to shaped for two-seater electric car. FEM (finite element method) was used to determine stress determination and rigidity of the Monocoque frame when receiving a static load. The results show that the Monocoque frame was still able to withstand the required loads with minimal deflection.The electric car is transportation which growing and constantly put through improvisation vehicle design. One of the structural components of the electric car which holds a major role is a frame. The purpose of this study is to get Monocoque frame design which lightweight and powerful for a city car with two passengers that was able to improve the efficiency of the battery voltage source. Monocoque frame should be able to accept the normal loads such as the weight of batteries, passenger, and body. The most important thing, Monocoque frame should also be able to protect the driver and passengers in the event of a collision. Mild steel was chosen for the design because it is easy to obtain and reasonable price as well as easy to shaped for two-seater electric car. FEM (finite element method) was used to determine stress determination and rigidity of the Monocoque frame when receiving a static load. The results show that the Monocoque frame was still able to withstand the required loads with minimal deflection.
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Strength analysis of Monocoque frame construction in an electric city car using finite element method
Proceedings of the Joint International Conference on Electric Vehicular Technology and Industrial Mechanical Electrical and Chemical Engineering (ICEV, 2015Co-Authors: Agus Makhrojan, Agus Suprihadi, Sigit Setijo Budi, Jamari Jamari, Rifky IsmailAbstract:Designing the chassis needs to be done element simulation analysis to gain chassis strength on an electric city car. The purpose of this reasearch is to get the results of chassis simulation on an electric city car when having load using FEM (Finite element method). This research was conducted in several stages of process, namely: modeling chassis by Solidworks and finite element simulation software. Monocoque frame is going to be simulated with static loading by determine fixed support and then will be given the vertical force. The fixed on Monocoque frame is clamped at both the front and rear suspensions. After the simulation based on FEM it can be concluded that frame is still under elastic zone, until the Monocoque frame design is safe to be used.
Sergio Pellegrino - One of the best experts on this subject based on the ideXlab platform.
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Imperfection-insensitive axially loaded thin cylindrical shells
International Journal of Solids and Structures, 2015Co-Authors: Xin Ning, Sergio PellegrinoAbstract:The high efficiency of circular Monocoque cylindrical shells in carrying axial loads is impaired by their extreme sensitivity to imperfections and there is an extensive body of literature that addresses this behavior. Instead of following this classical path, focused on circular cross-sections, this paper presents a novel approach that adopts optimal symmetry-breaking wavy cross-sections (wavy shells). The avoidance of imperfection sensitivity is achieved by searching with an evolutionary algorithm for smooth cross-sectional shapes that maximize the minimum among the buckling loads of geometrically perfect and imperfect wavy shells. It is found that shells designed through this approach can achieve higher critical stresses and knockdown factors than any previously known Monocoque cylindrical shells. It is also found that these shells have superior mass efficiency to almost all previously reported stiffened shells.
Altan Kayran - One of the best experts on this subject based on the ideXlab platform.
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design analysis and optimization of thin walled semi Monocoque wing structures using different structural idealization in the preliminary design phase
International Journal of Structural Integrity, 2014Co-Authors: Odeh Dababneh, Altan KayranAbstract:Purpose – In modeling an aircraft wing, structural idealizations are often employed in hand calculations to simplify the structural analysis. In real applications of structural design, analysis and optimization, finite element methods are used because of the complexity of the geometry, combined and complex loading conditions. The purpose of this paper is to give a comprehensive study on the effect of using different structural idealizations on the design, analysis and optimization of thin walled semi-Monocoque wing structures in the preliminary design phase. Design/methodology/approach – In the design part of the paper, wing structures are designed by employing two different structural idealizations that are typically used in the preliminary design phase. In the structural analysis part, finite element analysis of one of the designed wing configurations is performed using six different one and two dimensional finite element pairs which are typically used to model the sub-elements of semi-Monocoque wing st...
Robert D. Story - One of the best experts on this subject based on the ideXlab platform.
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Design of composite sandwich panels for a Formula SAE Monocoque chassis
2014Co-Authors: Robert D. StoryAbstract:Physical testing of composite sandwich panels in three point bending is an increasingly important aspect of qualifying a composite Monocoque for Formula SAE competition. Required stiffness and strength values have increased over the past three years, and more of the Monocoque's laminates must be tested as well. As a result, there is a need for software to accurately design a sandwich panel to meet stiffness and strength requirements on the first physical test, without requiring redesign and multiple tests. In this thesis, a method for calculating strength and stiffness of a composite sandwich panel is presented. Extensive physical testing is performed on sandwich panels typical of those found in a Formula SAE Monocoque, demonstrating the accuracy of the proposed method. The Formula SAE rules are examined in depth to determine how the physical testing results are used to determine if a Monocoque is legal for competition. This understanding of the rules, combined with the method developed for calculating sandwich panel performance, is used to develop a Sandwich Panel Design Tool. This tool allows the user to design a sandwich panel, predict the physical test results for that panel, and then determine if the panel will meet the rules requirements.