Master Degree / Yüksek Lisans Tezleri
Permanent URI for this collectionhttps://hdl.handle.net/11147/3008
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Master Thesis Design of Deployable Structures Comprising Altmann Linkages(01. Izmir Institute of Technology, 2020) Yıldız, Görkem; Kiper, GökhanThe main objective of this thesis is to investigate possible mobile networks comprising modified Altmann linkages which can be used as deployable structures. Altmann linkage is an overconstrained single-loop linkage with six revolute joints. Within the scope of this thesis, first a modified version of the Altmann linkage is introduced. The modified version of the linkage allows more feasible solutions for constructional design compared to the original linkage. Then, the loop closure equations are written and input/output relationship of the linkage are obtained. Next, possible networks of modified Altman linkages are examined. The networks are obtained either by taking two common links between adjacent loops, or connecting adjacent loops with two new revolute joints without any common links. Also, mobility analysis is performed for each network. Finally, the deployment stages of obtained networks are modelled in a CAD software. Some of the derived networks are already noted in the literature, but several novel networks are introduced in this thesis.Master Thesis A Study on the Use and Design of Mechanisms in Art and Architecture(Izmir Institute of Technology, 2020) Maral, Mesude Oraj; Korkmaz, KorayThis study consists of research on developmental processes, fundamentals, kinematic properties, and design methods of art and architectural examples that involve mechanisms and a proposal of a novel method of designing polygonal deployable surfaces. The effect of motion studies on art and architecture is analyzed from the first technical studies of motion and portable examples of architecture. The pre-industrial automata, acoustic designs, musical instruments, water-lifting devices, and aqueducts were designed by artists and architects as well; windmills that are the first rotating structures, clocks, clock towers, construction machines and early examples of movable bridges are examined. The kinematic properties and fundamentals of mechanisms are analyzed. The kinematic structural analyses of contemporary art and architectural products are conducted by drawing kinematic diagrams, demonstrating link and joint types and numbers; and mobility calculations. The primary units and assembly methods of them are examined. Strengthening the bond among the fields of kinetic architecture, art and mechanism science is intended. The present study is the first source in which examples from the related fields and corresponding kinematic science are explicitly transmitted for artists and architects. Finally, a novel design method for polygonal deployable surfaces that is adaptable to climatic, functional, visual and/or social needs is developed. The method starts with the kinematic design of the triangular primary unit, which is topologically Bennett's plano-spherical mechanism. The planar position provides covering surfaces, while the spherical linkage generates a 3D dynamic form during movement. The design is adapted to polygons and multiplied in Archimedean tilings. A single actuator can drive all designs. The modularity provides designs versatility and flexibility.Master Thesis Kinematic Design of Scissor Linkages(Izmir Institute of Technology, 2018) Karagöz, Cevahir; Kiper, GökhanThe primary objective of this thesis is to propose a design method for linkages simulating the transformation of a planar curve from an initial form to a final form. First, the topologies of fundamental loops are examined using symmetry patterns. Design methodologies for the hence obtained mechanisms are formulated. The given curves are discretized initially, and the nodes are constructed. Then the side lengths of the loops are obtained in order to obtain the desired transformation between the given curves. Finally, different deployable and transformable linkage examples are presented.Master Thesis Design of Single Degree-Of Planar Linkages With Antiparallelogram Loops Using Loop Assembly Method(Izmir Institute of Technology, 2017) Gür, Şebnem; Korkmaz, KorayThis research deals with the methodical derivation of single degree-of-freedom (dof) deployable and transformable linkages with antiparallelogram loops. The study starts with the review of literature on the mechanisms used in planar deployable structures, scissor mechanisms in particular. Scissor mechanisms have been subject of many research, including those that examine them in term of the loops formed. In this research, a summary of the loops observed in previous researches are mentioned. The simplest single-dof linkage is the four-bar linkage. Its loop geometry is quadrilateral. The loops defined formerly in the deployable structures literature are compared to the geometries classified under quadrilaterals and seen that use of antiparallelogram loops are yet to be discovered. While forming novel linkages with antiparallelogram loops, the loop assembly method that Hoberman utilized during his discovery of angulated scissor linkages is used. In order to lay out alternatives of loop arraying options, pattern generating methods are examined. Frieze group operations are found to be most suitable. Using those, loop assembly variations are formed. Later, links formed by these arrays are determined and linkages are formed, modelled and simulated using Solidworks®. Among many alternatives, five of them are chosen due to their novelties in specific aspects. In conclusion findings are compared to the previous research in the literature. Potentials of the novel linkages in terms of architecture are discussed and further research subjects are offered.Master Thesis Design of a Reconfigurable Deployable Structure for Post Disaster Housing(Izmir Institute of Technology, 2014) Ataer, Fulya; Korkmaz, Koray; Kiper, GökhanIn this thesis, the possibility of constructing reconfigurable deployable structure composed of planar linkage units has been explored. The first part of the thesis is devoted to literature survey on housing recovery. When the current researches on post disaster housing are investigated, it is observed that most of post disaster housing or temporary buildings in the literature are predefined portable, demountable or relocatable buildings. Deployable buildings serve for a single function. A study into the existence of alternative forms of a reconfigurable deployable structure has been done. The conditions for the alternative forms to be a multi-functional building have been derived. Reconfigurable deployable structure presented here is a single degrees-of-freedom (DoF) multi-loop linkage which has more than two configurations. The alternative forms that a linkage is constructed with the same links and connections are called configurations or assembly modes of the linkage. During its motion, the linkage may pass from one assembly mode to another, which is called reconfiguration or assembly mode change. Design and position analysis of the linkage mechanism have been implemented in Microsoft Excel® environment. The link lengths can be varied in this environment and the motion of the structure can be simulated by changing input joint parameters. Four different case studies have been designed in Microsoft Excel®. A reconfigurable deployable structure can be used as a multi-functional shelter or canopy which can take many forms in a few minutes for urgent needs after disasters, military purpose or public needs. Its deployed and retracted (or compact) geometries are explored. As a case study the dimensions of links are presented. Installation process for different functions is explained. The full concept for the structure, from outer covering material to foundation is then detailed. Finally, a sample material cost analysis is performed to determine if the product is financially feasible.