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 24 for “"static test"”.
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Static and dynamic large deflection flexural response of graphite- epoxy beams
… subjected to eccentric axial impact loads and to static eccentric axial loads, in order to assess the damage caused by impact. A geometrically and materially nonlinear analysis of the response and failure of the static test specimens is presented. The analysis employed an incremental, noniterative …
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The effects of cutouts in joists on the vibrational response of wood floors
… imposed load during the evaluation. Two types of tests were performed on the floors, a free vibration test and a drop weight test. Data collected from these tests were used to determine several dynamic variables. These variables are the peak displacement, peak acceleration, resonant frequencies, …
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Performance of laminated veneer wood plates in decking systems
… van trailer decking systems, 2) develop a testing facility to generate an experimental database on these product through full scale testing, and 3) develop and model the fatigue behavior of this type of product through small specimen tests and damage accumulation laws. A structural analysis …
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Registration and variability of side scan sonar imagery
… to image rectification and registration. A static test tank experiment is presented which analyzes the waveform, power spectral density, and temporal variability of the transmitted waveform. The results of a second static experiment conducted from the Woods Hole Oceanographic Institution …
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Improving the Quality of Terrain Measurement
… measurement systems. This procedure involves a static test to assess the limitations of the profiler's laser height sensor, and a corresponding dynamic test to evaluate the limitations of the positioning sensors. Even with a well calibrated system, inertial errors will accumulate. The second …
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The effect of lateral bracing on the dynamic response of wood floor systems
… The bracing systems were subjected to both static and dynamic loadings. The effect of the bracing systems were determined based on four parameters: one static, and three dynamic. The percent change in concentrated load carried by the loaded joist was used as the static test parameter. The …
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Bio-mimicry of a Leopard Tortoise’ Shoulder Girdle in Space Frame Design of an Ambulance Body
… from an ASTM document (American Society of Testing Materials). A separate model with boxy configuration is created so as to evaluate the bio-mimicry design technique. Both configurations are assigned similar material and physical properties which are deduced from low income resources and …
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Static and dynamic motion aftereffects of first- and second-order motion in central and peripheral fields of vision
… to a moving pattern, a subsequently presented static or dynamic test pattern will appear to drift in the opposite direction. This illusory drift is referred to as the motion aftereffect (MAE). It is well accepted that a MAE is not elicited after adaptation to second-order motion if tested with …
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Optimum Design of Composite Wing Spar Subjected to Fatigue Loadings
… are presently being over designed to satisfy static and fatigue requirements. A greater understanding of composite fatigue behavior will allow for even greater weight savings leading to increased fuel economy. A critical part of an aircraft that is subjected to fatigue bending loads are its …
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A Study on the Dynamic Characterization of a Tunable Magneto-Rheological Fluid-Elastic Mount in Squeeze Mode Vibration
This research undertakes the task of static and dynamic characterization for a squeeze mode Magneto-Rheological (MR) Fluid-Elastic mount. MR fluid's variable viscosity rate is advantageously used to develop a mount capable of mitigating input vibrations of varying magnitudes and frequencies …
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Experimental and Analytical Study of Vibrations in Long Span Deck Floor Systems
… stages. In the first part, experimental in-situ tests were conducted on thirteen bays of buildings under construction. The natural frequencies and acceleration responses were captured to observe the vibration behavior of the tested floors. In the second part, a laboratory footbridge was …
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Testing of the suspended vehicle system scale model
… guideway was constructed, instrumented, and tested. The model simulated five 250-ft-spans of the cable-stayed guideway for high-speed mass transportation type vehicles. Model vehicles consisting of single bogeys and single cars were designed and used during the test program. A falling weight …
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New Fatigue Test Method for Evaluating the Performance of Adhesive Bonded Joints
… selection is still often based upon simple quasi-static test results, determined at room temperature. This is generally a consequence of the complexity of fatigue behaviour and associated difficulty in reproducing expected service stresses and exposure conditions. Indeed, most parameters are held …
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Effects of Running Speed, Fatigue, and Bracing on Motor Control of Chronically Unstable Ankles
… instability and repeated sprain injuries. Quasi-static test methods indicate poor postural stability and joint position sense (JPS) as associated motor control deficits. Little research, though, has investigated ankle motor control under dynamic (simulated sport) or fatigue conditions. To better …
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Bioinspired algorithmic-driven design of additively manufactured composites
… and strength of composites. Dynamic and static test loading cases, together with simulation provide validation, demonstrating the effects of hierarchy and heterogeneity on composite impact performance. Furthermore, microcracks can be exploited as an impact-enhancing mechanism for …
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Quasi-Static and Creep Behavior of Enhanced SIC/SIC Ceramic Matrix Composites
… of the material at high temperatures. A quasi-static test was conducted at 1200 °C to determine the unloading response of the material. The stress-strain response of the composite demonstrates a hysterisis loop and a small amount of permanent strain, which are characteristic of the CMC's [3]. …
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Delamination damage of carbon fiber-reinforced polymer composite laminates under cyclic shear-induced loading conditions
… loading condition. A series of Mode-II-type tests were performed on prefatigued end-notched flexural (ENF) beams of CFRP composite laminates, [0]8 for different applied load ratio conditions (R = 0.1, 0.15 and 0.25) to induce only interlaminar damage at the pre-existing delamination interface …
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Trunk loading and back pain
… (H) have been evaluated primarily in quasi-static test situations involving isolated loading directly to the trunk. Nevertheless, transferability to everyday, dynamic situations is under debate. Therefore, the aim of this project is to analyse 3-dimensional motion and neuromuscular reflex …
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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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