Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"Kirigami"”.
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Functional kirigami by exploiting elastic instabilities
… inspired by a paper cutting technique, kirigami, attracted tremendous attention due to its robust and straightforward ability to transform two-dimensional flat precursors into three-dimensional space structures. In this dissertation, using a combination of physical experiments, …
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Optimization and analysis of doubly-curved Kirigami space frames
Inspired by the Japanese art of origami and kirigami, the concept of Spin-Valence is used to transform a two-dimensional sheet of metal into a three-dimensional spatial frame. Previous iterations of this design were developed by Emily Baker of the University of Arkansas, mainly by making scaled …
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A Kirigami Approach for Controlling Properties of Adhesives and Composites
… applications. Recently, techniques building upon kirigami principles, the Japanese art of paper cutting, have been considered an effective strategy to control stiffness and deformation of materials by systemically integrating cut patterns into inextensible sheets. The performance of …
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Tension Activated Kirigami Structures for Interlayer Use in Circular Construction Applications
… thesis investigates the use of tension-activated kirigami as an architected material, for which mechanical properties are determined by their designed structure (geometry) rather than the bulk material itself. These architected materials can be used as a dry replacement for adhesives in …
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Experimental and analytical investigation of the Spin-Valence kirigami space frame
The Spin-Valence kirigami space frame is an innovative deployable structure invented by Emily Baker, Assistant Professor at the University of Arkansas in the Fay Jones School of Architecture and Design. Professor Baker's motivation and research approaches concerning the creation of this original …
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Toward structural design of ultra-thin and flexible sensors
… I build upon prior work developing stretchable kirigami graphene sensors and flexible temperature-sensing pectin films to further improve their performance, robustness, sensitivity, and application. My first study presents a kirigami-patterned graphene mesh structure that achieves multiaxial …
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Mechanics driven architectures for flexible nanomaterial-based sensors
… art of paper cutting, the second study presents kirigami integrated architectures of graphene for strain-insensitive, surface-conformal stretchable multifunctional electrodes and sensors. Specifically, I demonstrate strain-insensitive electrical properties up to 240% applied tensile strain by …
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Geometric and Topological Aspects of Soft & Active Matter
… techniques fail. I begin with the problem of kirigami mechanics, i.e., designing a pattern of holes in a thin elastic sheet to engineer a specific mechanical response. Using an electrostatic analogy, I show that holes act as sources of geometric incompatibility, a feature that can fruitfully …
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BIOSENTERO: Bioinspired Soft Enteroscopic Robot for Facilitating Locomotion, Steering, and Intervention in the Deep Small Intestine
… expandable soft pneumatic actuators wrapped with Kirigami sleeves as the robotic head and tail units, a central hollow channel for housing accessory endoscopic tools, and a control box and joystick for navigation. The robot's body is a fiber-reinforced actuator with four inflatable chambers, …
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Using Rigid and Soft Grippers for Assistive Robotic Tasks
… feeding. Kiri-Spoon consists of a spoon-shaped kirigami structure: when actuated, the kirigami sheet deforms into a bowl of increasing curvature. Robot arms equipped with Kiri-Spoon can leverage the kirigami structure to wrap-around morsels during acquisition, contain those items as the robot …
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Programmable adhesion in dry and wet environments through geometric design
… easy release adhesives through art-inspiration (Kirigami) and bio-inspiration (Cephalopod). Chapter 2 explores the mechanical aspects of adhesive peeling. We compare experimental data with theoretical models to discuss the effect of energy dissipation, particularly through the plastic work of the …
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On the foldability of rigid origami
… matter, origami (the art of paper folding) and kirigami (paper folding with cutting) are especially appealing, as they are effective tools for transforming simple two-dimensional materials into complex three-dimensional structures. Rigid origami is the underpinning kinematics and dynamics of …
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Atomic layer deposition for mechanical, magnetic, and robotic systems
The Japanese paper arts origami and kirigami have revolutionized design of three-dimensional structures, metamaterials, and robots from planar materials. The design principles in these art forms are especially valuable for small systems because most nanofabrication involves lithographic patterning …
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Enabling New Functionally Embedded Mechanical Systems Via Cutting, Folding, and 3D Printing
Traditional design tools and fabrication methods implicitly prevent mechanical engineers from encapsulating full functionalities such as mobility, transformation, sensing and actuation in the early design concept prototyping stage. Therefore, designers are forced to design, fabricate and assemble …
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Multi-component Elastomer Composites for Next Generation Electronics and Machines
… plasticity' mechanism enabled by patterned kirigami cuts that allows for instantaneous shape fixing into load bearing shapes without the need for sustained power. The material properties are enabling for the creation of shape morphing robots, which we show through by integration of on board …
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At the Intersection of Bistability and Elastic Instability: Switching and Locking Structures using Asymmetric Carbon Fiber Composites
The next evolution of engineered structures would be to have an on-demand ability to become soft and foldable for packing in compact dimensions. This adaptive capability makes them convenient in transportation such as space structures where packaging of large deployable structures is crucial that …
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Statistical Mechanics of thermalized ribbons and sheets
<p>In this dissertation, we study the thermal behavior of two-dimensional sheets and ribbons. We study the effects of thermal fluctuations on the crumpling transition of elastic sheets. Existing two-dimensional sheets have a crumpling temperature which is very high and the crumpling transition has …
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Origami-inspired structures and materials: analysis and metamaterial properties and seismic design of hybrid masonry structural systems
This Dissertation was approved for publication on 2015-12-04 at 08:01.