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 45 for “"Load Path"”.
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Topology Optimization Using Load Path and Homogenization
… the connection between topology optimization and load transfer has been established. New methods for determining load paths in two dimensional structures, plates and shells are introduced. In the two-dimensional space, there are two load paths with their total derivative equal to the transferred …
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Determination of load path through concrete crosstie and fastening system: a laboratory and field investigation
… is laboratory and field investigation of the load path from rail-wheel to precast concrete crossties. In this research, the behavior of crosstie and fastening system is investigated through material-level, component-level and system-level laboratory and field experiments. The system-level …
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Understanding the vertical load path under static and dynamic loads in concrete crosstie and fastening systems
An understanding 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 …
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Structural performance of spoke wheel roof systems
… compression rings, and radial spokes and resists loads mainly through axial forces. Due to its light weight and ability to achieve a column-free, long span, it has been a popular solution to structures such as stadia since its first use in 1960s. However, there has been lack of information on the …
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Design of Variable Stiffness Composite Panels for Maximum Strength
… by tailoring fiber orientations for specific load conditions. This is achieved by allowing the fiber orientation to vary spatially across the design domain. Motivation for new design methods is driven by the recent advancements in composite additive manufacturing, such as automated fiber …
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Field test program of the concrete crosstie and fastening system
… focuses on the transfer of vertical and lateral loads through the system, demonstrating the demands of the fastening components (e.g. insulators, fastening clips) and concrete crossties. Measurements of strain and displacement are provided to quantify the flow of forces through critical …
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Mechanistic analysis of concrete crosstie and fastening system using field-validated finite element model
… system under vertical and lateral wheel load using finite element analysis, and 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 …
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Parametric analysis of progressive collapse in high-rise buildings
… forces, enhanced local resistance and alternate load path. Each method features its own advantages and disadvantages; however, the alternate load path is currently the preferred procedure as it is accurate and capable of dealing with complex systems. This method is investigated in detail with a …
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Building science through topology optimization
… of the information needed to determine the total load path in a graphical manner, allowing the engineer and/or architect to gain valuable insight to the problem at hand. Moreover, using the reciprocal form and force diagrams, we describe how in the course of finding one minimum load path …
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Form finding of structural reused material trusses with graphic statics
… while generally having a slightly higher total load path within the trusses.
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Vector-product-based Graphic Statics and Graphic Kinematics for moment-resisting structures
… structures with the definition of load paths by the designer. The procedure presumes a particular architectural hypothesis. A brief historiographical narrative of the main contributions in the field of Graphic Statics is given together with a closer review of the contributions made …
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Finite Element Model Validation and Testing of an Off-Road Vehicle under Dynamic Loading Conditions
… tools to simulate critical test cases whose loading conditions can be accurately represented by a series of static loads and constraints. Using these conditions, a Finite Element Model (FEM) can be employed to accurately predict the effects of the loading conditions in the components. During …
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Design of compliant mechanisms for attenuation of unidirectional vibrations in rotational systems
… mechanisms that are directly integrated into the load path of rotational systems. These devices enable designers to attenuate the amplitude of undesirable vibrations while simultaneously optimizing the transmission of torque inputs. The design, modeling, fabrication and experimental validation of …
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Geometry-based structural analysis and design via discrete stress functions
… it leads to the design, analysis and load-path optimisation of tension-and compression 2D and 3D trusses, tensegrities, the exoskeletons of towers, and in conjunction with force density, to tension-and-compression grid-shells, shells and vaults. Moreover, the abstract nature of this …
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Analysis and Testing of a Ready-to-Assemble Wood Framing System
… for the RTA buildings was presented. The lateral load path for the RTA building includes diaphragms and shear walls. The contribution of the RTA frame can be ignored from the lateral load analysis. This conclusion was validated for the diaphragms with aspect ratios up to 4:1. The finite element …
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Design and analysis of fiber reinforced elastomeric enclosures with application in upper arm orthosis
… pressure, material properties and applied load (kinetostatics). The accuracy of the model is verified by benchmarking with existing models for a popular McKibben Pneumatic Artificial muscle (PAM) actuator with two helically wrapped families of fibers having equal and opposite orientations. …
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Effect of loading history in necking and fracture
… of forming severity is introduced to study the loading history effect on metal forming limit diagram (FLD). Given the necking locus under proportional loading conditions, and using a non-linear accumulation rule of forming severity index, the proposed model well predicts the FLDs under different …
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Structural fatigue assessment and optimisation of offshore wind turbine jacket foundations.
… into a super element model. The time-series loads obtained from Bladed are used to assess fatigue damages experienced during the foundation's service life. Furthermore, the research presents a topology optimisation method to retrofit an existing jacket foundation design by finding the optimum …
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Identification and investigation of local optima in aerospace structural design
… cutout was plotted in a 3D surface contour plot. Load path theory and relevant plate buckling theories were used to explain the local and global maxima identified. The final example considered the maximization of the buckling load of a simply supported composite laminated plate under in-plane …
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Optimal Control of Multiple Quadrotors for Transporting a Cable Suspended Payload
… control performance for a cable suspended payload with single and two quadrotors based on optimised control techniques. The study utilised optimal controllers, such as the Linear Quadratic Regulator LQR, the Iterative based LQR (ILQR), the Model Predictive Control MPC and the dynamic game …
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