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 “"static testing"”.
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Experimental investigations of anchorage capacity of precast concrete bridge barrier for Performance Level 2
… with the current code requirements, research and testing were deemed obligatory. In particular, the anchorage capacity of the parapet under the CHBDC design load warrants verification. A finite element model of the barrier was developed in ANSYS to study its structural response. Static testing of …
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Kinematic and Kinetic Analyses of E-TPU Material in Bowling Footwear
… of bowling delivery. All shoes underwent static testing on top of a force platform. The static test involved dropping a 0.5 kg dumbbell inside a PVC pipe from a height of 0.61 meters onto the heel cup region in each type of shoe. Twelve healthy, college, right-handed recreational males …
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Structural performance evaluation and optimization through cyber-physical systems using substructure real-time hybrid simulation
… are often driven by experiments. Experimental testing not only enables the prediction of structural responses under those dynamic loads but also provide a reliable way to investigate new solutions for hazard mitigation. Common experimental techniques in structural engineering include …
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Strain rate and density dependent behaviour of bovine cancellous bone in compression
… bone are determined by means of low strain rate testing performed quasi-statically on the Zwick Universal Testing Machine and high strain rate testing performed on the Split Hopkinson Pressure Bar. Cancellous bone is sourced from the vertebrae of five bovine of slaughtering age. Two sizes of …
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Dual Mode Macro Fiber Composite-Actuated Morphing Tip Feathers for Controlling Small Unmanned Aircraft
… Computational Fluid Dynamics (CFD). Real-world static testing on a feather confirmed preliminary FEA results, and wind tunnel tests simulating assumed cruise conditions confirmed the feather would not exhibit any adverse structural behaviors, such as flutter or aeroelastic divergence. From its …
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Loading Rate Effects on Axial Pile Capacity in Clays
… performed on foundation piles. Traditionally, static tests with an average duration of approximately twenty-four hours have been performed on test piles to obtain their axial capacity. These static tests require multiple piles used as anchors in addition to the test pile. Static tests are both …
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Parametric impact characterisation of a solid sports ball, WITH a view to developing a standard core for the GAA Sliotar
… demonstrated limited applicability of quasi-static testing and springtheory equations. Analysis of ball deformation behaviour demonstrated that centre-of mass displacement and diameter compression values were not consistently equivalent for all ball types. The contribution of manufacturing …
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Experimental study and numerical modelling of woven fabric kenaf fiber composites hybrid adhesively bonded-bolted joints
… (CFRP) composite hybrid joints under quasi-static testing and to carry out the strength prediction works subsequently by implementing physically-based traction-separation constitutive law. Testing series investigated includes variation of joint types, normalized W/d = 2 to 5, reinforcing …
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Extending the annular in-plane torsional shear test specimen to applications at high strain rates
… used for material characterisation in the quasi-static regime. The aim of this research was to conduct further quasi-static testing using the in-plane torsion test and to extend its use into the dynamic regime. Quasi-static tests were performed on a quasi-static torsional (QST) system that was …
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Design Manual Development for a Hybrid, FRP Double-Web Beam and Characterization of Shear Stiffness in FRP Composite Beams
… alternatives to steel and concrete. Extensive testing and analysis of a pultruded, hybrid double web beam (DWB) developed for use in bridge construction has been conducted at Virginia Tech. A primary purpose of this testing is the development of a structural design guide for the DWB, which …
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Testing of the suspended vehicle system scale model
… a signal to a real-time frequency analyzer. The testing program consisted of both static and dynamic phases. Static tests were used to determine the behavior of the structure to dead loads. Free vibration tests indicated the fundamental structural frequencies, and moving load tests measured the …
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Skill embeddings: artificial neural network representations for pedagogical policy development.
… composition and difficulty of items, in a static testing scenario, by training an artificial neural network to learn representations - skill embed- dings - of students and items that relate to each other in a common vector space. Second, a practice-based approach to directly infer a …
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Interlaminar reinforcement of carbon fiber composites from unidirectional prepreg utilizing aligned carbon nanotubes
… the resulting interlaminar region morphology and static short beam strength (SBS) in shear, of a quasi-isotropic layup using Hexcel IM7/8552 carbon fiber aerospace composite prepreg. In addition, fatigue testing was performed on a selected A-CNT height to generate a SBS fatigue life curve. …
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Enviro-Mechanical Durability of Graphite/Epoxy Composite Materials
… effects. Results from thermal analysis and quasi-static testing on neat resin and unidirectional laminates as a function of temperature and moisture are presented which provide insight into how material properties vary with temperature and moisture and form the inputs necessary to evaluate …
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The Viability of Steel-Concrete Composite Girder Bridges with Continuous Profiled Steel Deck
… was supplied by Wheeling Corrugating. Fatigue testing was conducted to determine the fatigue resistance of the specimen at both levels of interaction, with load ranges calculated using the AASHTO LRFD shear stud fatigue equation. This was followed by static tests to failure to determine the …
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System Identification and Calibration Techniques for Force Measurement in Active Magnetic Bearings
… Although this characterization relies on static testing to identify system parameters, the identified parameters can then be used in the measurement of dynamic forces. The identification procedure provides a measurement of effective air gap length. Effective gap length is used to infer the …
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Adaptation of Biophysical Platforms to the study of Blast Injury
… pressures. First, both dynamic and quasi-static testing apparatus were used to study the mechanical properties of biological samples. The knowledge gleaned from this testing is used to infer the biomechanical basis of susceptibility to blast for a given sample. Secondly, this thesis …
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Analysis, Design and Testing of a Wind Tunnel Model to Validate Fiber-Optic Shape Sensing Systems
… of the composite bodies was supplied by static testing of the test articles. The code was iterative in that it ran the VLM code to estimate the forces and moments on the wing and these were applied to a linear beam which gave the wing a new geometry which in turn was run through the VLM. …
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Utilization of coconut fibres and ropes as concrete reinforcement in mortar-free construction with novel interlocking blocks: Considering its application in earthquake resistant housing
… the best properties of CFRC. During the standard static testing, cracks were produced in CFRC cylinders (unlike the spalling/splitting of plain concrete) while performing compressive and splitting tensile strength tests. CFRC beamlets did not break into two pieces after a crack was produced, …
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NONDESTRUCTIVE EVALUATION USING REAL-TIME SHEAROGRAPHY
… conventional double-exposure shearography for static testing and the commonly adopted time-average shearography for vibration study have been credited for their particular contributions and evaluated for their shortcomings. Real-time shearography, though receiving only limited qualitative …
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