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 20 for “"mechanistic design"”.
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Mechanistic Design Concepts for Full-Depth Asphalt Concrete Pavements
A mechanistic design procedure for Full-Depth asphalt concrete AC pavements for highways is proposed and validated. The procedure is based on ILLI-PAVE, a stress dependent finite element computer program, coupled with appropriate transfer functions.
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Calibrated mechanistic design procedure for jointed plain concrete pavements
A comprehensive design procedure for the structural design of jointed plain concrete pavements is developed. The research approach followed in the development of the design procedure is distress prevention oriented. The design process involves the determination of pavement characteristics that …
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Railroad track fastening system demands and response: Implications for mechanistic design
The student, Marcus Dersch, submitted this Dissertation for approval on 2022-04-20 at 09:13.
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Quantification of prestressed concrete railway crosstie flexural response: Implications for mechanistic design
… development and implementation of a structural design method that enables optimization of crosstie design for varied applications and loading environments will reduce initial capital cost and recurring maintenance expense. Center flexural cracking is one of the most common factors limiting the …
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Self-folding bilayers: Mechanistic design principles for programmable and on-demand shape reconfiguration
… complex three-dimensional architectures. The mechanistic design principles responsible for bilayer morphing have been established and validated through a combination of nonlinear finite element modeling and experiments with cross-linked polymeric systems. Several classes of structures such as …
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Establishing the Location and Magnitude of Critical Tensile Strains and Octahedral Shear Stresses for Design of Asphalt Concrete Pavement Systems
… surface cracking and rutting. Traditional mechanistic design procedures account for two modes of failure in asphalt pavements: Fatigue and Rutting.
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A knowledge base for rehabilitation of airfield concrete pavements
… techniques can be used to quickly select and design rehabilitation alternatives for a runway, taxiway or an apron. The AIRfield PAvement Consultant System (AIRPACS) uses the knowledge of planners, constructors, airfield managers and designers to solve difficult jointed plain concrete pavement …
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Impact of structure, material properties, temperature curling, and trafficking on load transfer efficiency
… of rigid airfield pavements. The current FAA mechanistic design procedure for rigid pavements assumes constant stress-based load transfer efficiency (LTE (S)) of 25% at the joints. The design procedure assumes the material properties remain constant throughout the life of the pavement. …
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Field test program of the concrete crosstie and fastening system
… development of its high speed rail program, the design and performance of concrete crossties and elastic fastening systems must be upgraded. As a part of a study aimed at improving concrete crossties and fastening systems, field experimentation was performed at the Transportation Technology …
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Multifaceted approach for the analysis of rail pad assembly response
… crosstie fastening systems are required. A mechanistic design approach based on scientific principles, derived from extensive laboratory and field investigation and combined with computational analyses, has the potential to improve the current state-of-the-art in fastening system design. The …
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Understanding the vertical load path under static and dynamic loads in concrete crosstie and fastening systems
… of the load path is necessary for developing a mechanistic design approach for the crossties and fastening systems. It is important to follow the flow of forces through the system to understand the demands on each individual component. In spite of extensive research focusing on the vertical load …
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Polyelectrolyte multilayer growth factor delivery : mediating tissue/device interactions
… were controlled through rational polymer design, tuning film composition, and varying film architecture. In studies with a model protein lysozyme, 100% retention of protein function was observed, underscoring gentle process conditions. In vitro experiments with Fibroblast Growth Factor-2 …
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Acetate-based Electrolytes for Aqueous Zinc-ion Batteries: An Investigation of the Zinc Anode
… balance. Collectively, these results yield a mechanistic design map linking concentration, pH, collector choice, and morphology, and provide practical guidance for selecting between concentrated WiSE and dilute, pH-regulated acetate regimes in next-generation aqueous Zn batteries.</p>
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A Holistic, Interpretive Concept of Systems Design
… presents a systems concept of systems design. The author argues that modern design is trapped in an atomistic-holistic paradigm which has curtailed the major benefits promised by the systems approach to tackle the pressing problems of our time. It is conjectured that the trouble lies in …
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Saccadic decision-making in dynamic real-world scenes
… a computational framework and experimental designs to disentangle the contributions of individual attentional mechanisms to the saccadic decision-making process when observing dynamic real-world scenes. In the first study, we systematically explored the role of object-based attention in …
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Performance of Silty Sands and their Use in Flexible Airfield Pavement Design
Traditionally, flexible pavement design relies on past experience and semi-empirical methods developed through a combination of element testing and modelling. Element testing in this area especially, has centred on the performance of clean sands. This is in conflict with actual practice where a …
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Mechanistic analysis of concrete crosstie and fastening system using field-validated finite element model
… explore possible improvement for current track design standard. The damage of fastening system is one of the most prevalent failure causes for concrete crosstie track, however the current AREMA design standard only includes evaluative tests for the fastening system, rather than a mechanistic …
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Influence of moving load, structure, temperature gradient, and wheel configuration on load transfer efficiency
… materials over the natural subgrade. Pavement design involves the interaction of pavement with vehicular loads and climatic conditions. The Federal Aviation Administration (FAA) uses a mechanistic design procedure, FAARFIELD, for the design of rigid airport pavements. The FAARFIELD (FAA Rigid …
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Evaluation of selected airport pavements in New Mexico
… The PCI value is used in pavement rehabilitation design. Based on the SN value, 6 out of 18 runway pavements are found to be in poor condition. Their SN values are below the minimum required value of 50. Low skid resistance can pose a threat to the safe operation of aircrafts on pavements during …