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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 66 for “"fasteners"”.
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Tribological Aspects of the Self-Loosening of Threaded Fasteners
… with any degree of complexity uses threaded fasteners. Although threaded fasteners are generally considered a mature technology, significant problems exist with their use. This study has investigated a number of issues with the tightening and self-loosening of threaded fasteners. - It was …
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Thermomechanical and Vibration Analysis of Stiffened Unitized Structures and Threaded Fasteners
… thermomechanical analyses performed on threaded fasteners and curvilinearly stiffened composite panels with internal cutouts. The former problem was analyzed using a global/local approach using the commercial finite element software ANSYS while a fully functional code using isogeometric analysis …
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Interaction of stainless steel threaded fasteners with stainless steel locking inserts
The interaction of stainless steel threaded fasteners with stainless steel locking inserts was investigated with special emphasis on high-vacuum environment applications. Nondestructive and destructive test methods were used in conjunction with information gathered from investigation with a …
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Effect of surface hardening conditions on susceptibility of fasteners to hydrogen embrittlement
… to hydrogen embrittlement of case hardened steel fasteners. While case hardened fasteners have been studied previously, there are currently no processing guidelines supported by quantitative data for fastener standards. Through sustained load and incremental step load embrittlement testing …
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Relationships between MIBANT bend angles and selected material properties of pallet fasteners
… strength and MIBANT bend angle of driven steel fasteners. Static yield strength values for pallet nails were found to values (p > 0.0001 be linearly related to the dynamic 2 and R² = 0.950) and hence MIBANT bend angles. Static yield strength values were also related to MIBANT bend angles (p > …
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Evaluation of deck fasteners functioning as shear connectors for composite steel joists
The use of deck fasteners as shear connectors for composite open web steel joists is studied. Results of thirty-six push-off tests are evaluated in terms of strength and behavior. Six types of deck fasteners are considered. They are: 1. #12-24 Teks/5 self-drilling, self-tapping screws. 2. 1/4-14 …
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Determination of Lateral Resistance of Deck Tie Fasteners in Smooth Top Bridge Girders
… capacity and spacing requirements of deck tie fasteners in curved railroad bridges with smooth top girders. In railroad bridge design, required lateral resistance dictates the spacing of deck tie fasteners. Currently, no provisions exist to aid in the calculation of lateral resistance for …
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Finite element and experimental evaluation of injection forging for the forming of automotive fasteners
… competition, it is important for the automotive fasteners industries to reduce the cost and improve the production efficiency against other competitors. To achieve it, the author intends to introduce injection forging as an alternative method to conventional forming for automotive fastener …
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Design and performance evaluation of railway sleeper baseplate hold-down system for timber sleeper elastic fasteners
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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Evaluating the Effect of Decking Fasteners on the Seismic Behavior of Steel Moment Frame Plastic Hinge Regions
… to determine the effects of powder actuated fasteners (PAF) and puddle welds on the seismic behavior of steel moment connections. In seismic regions, PAF are currently prohibited in the connection region (referred to as the protected zone) due to the concern of low-cycle fatigue fracture. …
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An assessment of manufacturing quality variation and an SPC handbook for the pallet and container industries
… product such as raw material, cut-stock, fasteners, and workmanship. The raw material proved quite variable from the different sawmills. The between board variation was greater than the within for both the thickness and width. The cut-stock had less size variation in thickness than width. …
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Railroad Tie Lateral Resistance on Open Deck Plate Girder Bridges
… bridge superstructure and anchored with deck tie fasteners such as hook bolts. These fasteners provide lateral resistance for the bridge ties. Currently there are no provisions to assist in the calculation of lateral resistance provided by railroad ties on open-deck bridges, and as a result there …
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Withdrawal and combined load capacity of threaded fastener wood joints
… strength applicable to joints containing fasteners with widely varying thread geometries. A total of 419 tests of joints using six different fasteners and five species were tested. A multiplicative model containing wood specific gravity and the wood volume contained within the fastener …
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A CNS-led intervention to improve rates of respiratory mechanical device-related pressure injuries in critically ill patients : a DNP project
… (MDRPI). Endotracheal tubes (ETT) and their fasteners constitute a portion of these injuries and may lessen the quality of life and function of the critically ill patients who suffer from them. Local Problem The purpose of this quality improvement project was to determine if a bundle of …
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Half-Lap Cross Laminated Timber Pegged Joints
… primary methods of joining CLT with metallic fasteners: the butt joint, half-lap joint, and spline joint. Currently, there are efforts to reduce the embodied energy associated with CLT buildings, leading to research exploring alternatives to metallic fasteners. This research investigates the …
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Biological growth on mineral façades
… the structural wall behind. We believe that the fasteners are heat bridges, with higher outer surface temperature and therefore a lower surface relative humidity at which no microbial growth occurs. Results from computer simulations showed that the fasteners are heat bridges and in cases with …
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Performance of Pressure Sensitive Adhesive Tapes In Wood Light-Frame Shear Walls
… comparison of connections involving mechanical fasteners with those that utilized only adhesive tape or a combination of the two. It was found that an application pressure of 207 kPa (30 psi) or greater was needed to form a sound bond between the acrylic foam adhesive tape and a wood substrate. …
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Timber joinery in modern construction: Mechanical behavior of wood-wood connections
… in lieu of the modern convention of metallic fasteners? This thesis addresses both questions as applied to the Japanese Nuki joinery type, though the workflows may be applied to any joinery geometry. First, the rotational stiffness of the Nuki joint is characterized and cross-verified using …
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A Low Cycle Fatigue Testing Framework for Evaluating the Effect of Artifacts on the Seismic Behavior of Moment Frames
… artifact is used to describe both defects and fasteners that create discontinuities in the steel such as notches, nicks, welds, powder actuated fasteners, self-drilling screws, repaired defects, and others. Although artifacts occur in real structures and their presence may affect the ductility …
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