Browsing by Subject "Origami"

Now showing 1 - 3 of 3
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    Ceragami
    (2016) Patel, Mona; Jefferson, Corey; Baker, Lesley; Giddings, Anita
    Ceramics is one of the oldest mediums of creating works of art over the past centuries; however there has been a significant improvement and advancements towards creating different forms with it. I intend to capture the outcomes of the interdependent qualities of these materials. As the work is a combination of ceramics and Origami, I originated the term 'Ceragami'.
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    Design of an Origami Patterned Pre-Folded Thin Walled Tubular Structure for Crashworthiness
    (2019-05) Chaudhari, Prathamesh; Tovar, Andres; Nematollahi, Khosrow; El-Mounayri, Hazim A.
    Thin walled tubular structures are widely used in the automotive industry because of its weight to energy absorption advantage. A lot of research has been done in different cross sectional shapes and different tapered designs, with design for manufacturability in mind, to achieve high specific energy absorption. In this study a novel type of tubular structure is proposed, in which predesigned origami initiators are introduced into conventional square tubes. The crease pattern is designed to achieve extensional collapse mode which results in decreasing the initial buckling forces and at the same time acts as a fold initiator, helping to achieve a extensional collapse mode. The influence of various design parameters of the origami pattern on the mechanical properties (crushing force and deceleration) are extensively investigated using finite element modelling. Thus, showing a predictable and stable collapse behavior. This pattern can be stamped out of a thin sheet of material. The results showed that a properly designed origami pattern can consistently trigger a extensional collapse mode which can significantly lower the peak values of crushing forces and deceleration without compromising on the mean values. Also, a comparison has been made with the behavior of proposed origami pattern for extensional mode verses origami pattern with diamond fold.
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    Origami Inspired Design of Thin Walled Tubular Structures for Impact Loading
    (2019-08) Shinde, Shantanu R.; Tovar, Andres; Nematollahi, Khosrow; Dalir, Hamid
    Thin-walled structures find wide applications in the automotive industry as energy absorption devices. A great deal of research has been conducted to design thin-walled structures, where the main objective is to reduce peak crushing forces and increase energy absorption capacity. With the advancement of computers and mathematics, it has been possible to develop 2D patterns which when folded turn into complex 3D structures. This technology can be used to develop patterns for getting structures with desired properties. In this study, square origami tubes with folding pattern (Yoshimura pattern) is designed and studied extensively using numerical analysis. An accurate Finite Element Model (FEM) is developed to conduct the numerical analysis. A parametric study was conducted to study the influence of geometric parameters on the mechanical properties like peak crushing force, mean crushing force, load uniformity and maximum intrusion, when subjected to dynamic loading. The results from this analysis are studied and various conclusions are drawn. It is found that, when the tube is folded with the pattern having specific dimensions, the performance is enhanced significantly, with predictable and stable collapse. It is also found that the stiffness of the module varies with geometrical parameters. With a proper study it is possible to develop origami structures with functionally graded stiffness, the performance of which can be tuned as per requirement, hence, showing promising capabilities as an energy absorption device where progressive collapse from near to end impact end is desired.