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.
Results
Showing 1 to 20 of 61 for “"Geometric Design"”.
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The geometric design of functional shapes
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1997.
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Programmable adhesion in dry and wet environments through geometric design
… the infundibulum structure of an octopus. We design a compliant, curved stalk paired with an active, deformable membrane that adapts its shape to complex surface conditions for effective attachment. The curvature of the stalk enhances attachment by increasing conformal contact on large-scale …
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Geometric design of scissor-type deployable structures based on structural behavior
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Rational Cubic B-Spline Interpolation and Its Applications in Computer Aided Geometric Design
… have recently become very popular tools for the design of curves and surfaces. If the weights are positive then the NURB will lie in the convex hull of its control points and will not possess singularities. Thus it is desirable to have positive weights.</p> <p>In utilizing a NURB a designer may …
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Ramp control strategies and geometric design implications of high-speed automated transportation systems
… in succession. The adequacy of the existing geometric design specifications are questionable, not only for the merging section, but the entire stretch of the "smart highway”. The introduction of intelligent highway network extensively in rural areas could necessitate a complete rethinking …
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Geometric Design Methods for Conducting Solids Cooled by Conjugate Heat Transfer Including Surface Radiation
… this dissertation is to develop and investigate design methods for conducting solids cooled by multimode heat transfer, including surface radiation. The goal is to determine solid shapes with reduced or minimal overall thermal resistances. The influence of radiation on the predicted optimal …
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Deployable structures and their applications in architecture: Geometric design and kinematics of mirrored scissor assemblies
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms
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Systems engineering framework to assess the effect of very large capacity aircraft in airport operations
… runway capacity, b) development of new airfield geometric design guidelines, c) terminal and landside impacts and gate compatibility issues, and d) possible noise and pavement design impacts. This research defines realistic parametric templates of feasible aircraft design using computer methods …
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Design of shafts for general engineering applications.
In this work a design procedure for determining of shaft sizes is outlined. The design procedure is a summary and a result of a literature search with the aim of assisting an engineer, practicing in general engineering. The author does not postulate any theoretical concepts and does not contribute …
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Interactive 3-D computer-aided design of external spur gears cut by a hob
… program is presented which enhances the design of external spur gears cut by a hob. The program code calculates the geometry of an involute spur gear with trochoidal fillets and then uses the Graphical Kernel System (GKS), CADAM, and MOVIE.BYU to represent and display the gear. GKS, an …
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Vehicle Dynamics Model for Predicting Maximum and Typical Acceleration Rates for Passenger Vehicles
… profiles of vehicles are important in the geometric design of roadways and are used to model vehicle behavior in simulation software packages. The acceleration profile of the vehicle is also a critical parameter in fuel consumption and emissions models. This paper develops and validates a …
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Improvement in mechanical properties through structural hierarchies in bio-inspired materials
… disparate one (e.g. toughness). These excellent design examples from biology raise questions about whether similar design., and improvement in disparate properties, can be achieved using common engineering materials. The identification of broad design principles that can be transferred from …
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Impact of Design Parameters on Detached-Die Tapered Resin Injection Pultrusion
… In this work the impact of various geometric design parameters (the length of the injection chamber, slot width, multiple injection slot locations, and part thickness) on the performances and complete wetout of the composite parts for both the attached-die and detached-die …
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Reverse engineering nature : design principles for flexible protection inspired by ancient fish armor of Polypteridae
This thesis is about designing structures that combine the dual functions of mechanical protection and flexibility of motion. The structures are inspired by principles observed in the ganoid squamation (scale assembly) of an ancient fish species called Polypteridae, which first appeared 96 million …
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Design of a micro-interdigitated electrode for impedance measurement performance in a biochemical assay
… for impedance measurements is dependent upon the geometric design of the electrode pattern and can be significantly impacted by manufactured variability or defects. For processes which rely on precise electrode performance, such as the biochemical assay in the Daktari CD4 diagnostic system, it is …
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Motion based seismic design and loss estimation of diagrid structures
… popular structural system in high rise design and construction. Little research has been performed on the seismic performance of Diagrids and how it integrates with seismic loss estimation. A motion based design scheme can facilitate the seismic design of Diagrids with the ultimate goal …
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The Piezoresistive Effect In Microflexures
… in complex loading conditions would expand the design possibilities of piezoresistive devices. A new model to predict piezoresistive effects in tension, compression, and more complex loading conditions is proposed. The focus of this research is to verify a unidirectional form of this proposed …
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HESCAD - an interface between HESCOMP and CADAM for the generation of helicopter models
… research forms a basis for preliminary aircraft geometric design using the CADAM system. The helicopter design program, HESCOMP, originally a batch mode program, was coupled with CADAM via the CADAM data base such that the analysis, design, and redesign of the helicopter geometry and interior …
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Silicon field emission pressure sensor
… two generic emitter array diodes regarding the geometric design parameters, which are essential to device design, are presented. Various wet and dry etching techniques of forming emitter arrays are compared. A combined wet/dry fabrication process is developed to achieve array uniformity and …
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Design exploration through bidirectional modeling of constraints
Today digital models for design exploration are not used to their full potential. The research efforts in the past decades have placed geometric design representations firmly at the center of digital design environments. In this thesis it is argued that models for design exploration that bridge …
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