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 20 of 27 for “"lightweight structures"”.
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Lightweight Structures Enabled By Microfabrication
Lightweight structures are the product of the science of making things as light as possible with constraints, which is conventionally referred to light yet sufficiently strong or stiff. The recent advancements in microfabrication have allowed the manufacture of structures with unprecedented …
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Lightweight structures in urban design
Lightweight architecture questions how we architects think about the environment. It has qualities which complement "mainstream" buildings. This thesis will explore these qualities and will propose that this architecture is rooted in the modern sensibility and suggests an attitude towards the …
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Detecting and parsing embedded lightweight structures
… code are all documents that contain language structures that can be parsed with corresponding parsers. Some documents, like JSP pages, Java tutorial pages, and Java source code, often have language structures that are nested within another language structure. Although parsers exist exclusively …
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Mixed Isogeometric Form Finding Of Lightweight Structures
Cables and membranes structures are among the most used lightweight structures for large span applications. They are widely known as optimal systems since they adapt their shape which is not known a priori to the flow of forces transmitting applied loads to the supports by pure tension forces. The …
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Shape optimization of lightweight structures under blast loading
… critical need for effective methods to generate lightweight components for blast mitigation. The overall objective of this research is to make advances in structural design methods for the optimization of lightweight blast-mitigating systems. This thesis investigates the automated design process …
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Vibrations in lightweight structures - Efficiency and reduction of numerical models
… in 1994. Compared to conventional concrete structures, it is more difficult to build lightweight structures in such a way that noise and disturbing vibrations is avoided. To design buildings of high performance regarding sound and vibrations, it is desirable to have tools for predicting the …
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Rolling-Ball Rubber-Layer system for the lightweight structures seismic protection: experimentation and numerical analyses
… not a mere extension of the ones used for civil structures, although the basic theories and concepts of seismic isolation are the same. Indeed, the following technical peculiarities have to be considered: the contents have masses orders of magnitude smaller than those characteristic of civil …
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Multi-Fidelity Analysis and Optimization of Lightweight Structures Subject to Significant Fluid-Structure Interaction Effects
The motion and deformation of structures such as aircraft, turbomachinery, offshore marine systems, and next-generation prosthetic devices are inherently coupled with the surrounding fluid flow. These interactions, commonly referred to as fluid-structure interaction (FSI), require the simultaneous …
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Crashworthiness Multi-Material Topology Optimization for Minimum Mass
There is an increasing need for lightweight structures in the transportation industry, and within these lightweight structures crashworthiness and occupant safety is continually important to all stakeholders. Industry standard lightweighting tools such as topology optimization (TO) and emerging …
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Compressive Instabilities in Metal-coated Polymer Microtrusses
Lightweight structures directly contribute to the sustainability of aviation, as their use reduces the structural weight of aircraft which in turn reduces fuel burned during flight. One family of lightweight structures are metal-coated polymers. Hybrid polymer-nanometal microtrusses are a member of …
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Serviceability-based design of tall buildings subjected to vortex shedding
… amounts of materials used and resulting in lightweight structures that are flexible. As the height of the buildings increases, these lightweight structures become more flexible making them susceptible to excessive wind-induced motion. Although there are multiple factors that govern …
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Adaptable structural surfaces
The framework for this thesis are the lightweight constructions that have been developed during the 20th century. As part of this thesis, a prototype for a column has been developed, that is a hybrid construction out of a lattice and surface structure. It follows the principle of adaptability …
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A study on cork-based plastic composite material
… panels are mainly used in construction for lightweight structures since their concept is appropriate due to extremely high in-plane and flexural stiffness to weight ratios. However, low structural freedom and high environmental burdens of core material in sandwich panels such as fiberglass, …
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ADDITIVELY MANUFACTURED METALLIC CELLULAR STRUCTURES
<p>"Cellular structures are lightweight structures with excellent mechanical, thermal, and acoustic properties. They offer promise in a series of applications, including lightweight applications, sandwich cores, mechanical damping, acoustic absorption, strain isolation, and thermal management. The …
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Extrusion foaming of bioplastics for lightweight structure in food packaging
… kinetics were then followed. Creating lightweight structures by foaming is considered to be one of the effective ways to reduce material consumption, hence the reduction of density and morphology of PHBV-based foams using extrusion foaming technique were studied comprehensively in terms …
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An Intelligible Software (CFA) Approach for Fiber-Reinforced Laminate Failure Analysis Including a Piecewise Representation of the Tsai-Wu Failure Criterion Using Excel and MatLab
… of petroleum continues to escalate, the need for lightweight structures for vehicle applications becomes more evident. The ability to engineer materials so that they possess desired application specific properties and characteristics has made tremendous progress in the past century. Consequently, …
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A DEM for visualising damage evolution and predicting failure of composite lamina under uniaxial and biaxial loads
… comparing with natural metals resulting in very lightweight structures which in turn reduce fuel consumed by aircraft, for instance. They also provide an excellent resistance to, corrosion, fatigue stress, impact force and chemical attack. The main concern in use of these materials is the …
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Bistable Hybrid Textile Structures: Combining Knitting and 3D Printing Fabrication Methods for Adaptive Building Skin Applications
… a great opportunity to design shape-morphing lightweight structures that are constructed with traditional and digital fabrication techniques. The primary method used is 3D printing onto an industrially knitted textile as a feature within a larger surface to create a responsive and self forming …
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Machine learning methods for architected materials
… structural and functional applications such as lightweight structures for blast protection, efficient heat exchangers, or battery electrodes with large specific surface area. They have an intricate microstructure which is a feature that makes them both attractive to use but also difficult to …
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Microstructure-based Constitutive Models for Residual Mechanical Behavior of Aluminum Alloys after Fire Exposure
… used in a broad spectrum of applications such as lightweight structures, light rail, bridge decks, marine crafts, and off-shore platforms. The post-fire (residual) integrity of aluminum structures is of particular concern as a severe degradation in mechanical properties may occur without …
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