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 “"joint strength"”.
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Plasma-based surface treatment for improving joint strength of joined ceramics and ceramic matrix composites
L'abstract è presente nell'allegato / the abstract is in the attachment
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The selection of adhesives and composite matrix resins for aircraft repairs
… limitations. The aspects studied were tensile strength, tensile modulus, elongation at failure, fracture energy, compression strength, compression modulus, water uptake, Tg dry and we t and diffusion coefficient. A computer programme written at Leicester Polytechnic was adapted to suit an IBM …
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Experimental and Numerical Study on Bolted/Bonded Composite Joints for Aircraft
… has advantages and disadvantages, bonded joint technology has the potential to reduce the weight and manufacturing cost of advanced aircraft structures. However, bolted joining is still generally required for certification and regulatory compliance. An alternative to these technologies is …
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Design of an experiment to investigate submerged arc welding variables
… an experiment to investigate the affect on weld joint strength and hardness distribution across the weldment by using (1) Four different welding currents (450, 500, 550, and 650 amps). (2) Three different steels (M 1020, SAE 1045 and SAE 1095) and (3) Two different electrodes (Hobart type C-10 …
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Adhesive bonding of stainless steel :Sstrength and durability.
… be used to bond dissimilar materials, adhesive joints have a high stiffness to weight ratio and the stress distribution within the joint is much improved. Stainless steels are commonly used in applications that would clearly benefit from adhesive bonding; architectural cladding, because of the …
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Adhesive bonding of stainless steel : strength and durability
… be used to bond dissimilar materials, adhesive joints have a high stiffness to weight ratio and the stress distribution within the joint is much improved. Stainless steels are commonly used in applications that would clearly benefit from adhesive bonding; architectural cladding, because of the …
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FAILURE MECHANISMS OF STRUCTURAL ADHESIVE JOINTS
… of moisture on epoxide adhesive (BGEBA/DAB) joints has been investigated. On exposure up to 10 080 hours, using sandblasting treatment on aluminium prior to bonding, the joint strength had decreased far more rapidly at higher activities above 0.7 than at lower activities. The amount of …
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Design and optimisation of adhesively bonded overlap joints
… and composite materials. The most common joint configuration is the lap shear joint, which has been investigated widely and several ideas have been proposed to improve its performance. For example, the introduction of fillets at the overlap ends or tapering of the substrates can reduce the …
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Imagery content and perspective and its effect on development of muscular strength
… the effect of imagery content and perspective on strength. Subjects were 44 women, ages 19 to 34, classified as beginning weight lifters. All were pre-tested on imagery ability and knee joint strength. Subjects were randomly assigned to one of three training conditions: (1) an internal imagery …
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Experimental study and numerical modelling of woven fabric kenaf fiber composites hybrid adhesively bonded-bolted joints
Couple with natural fiber composite parts, hybrid joints provide better joint strength than using separate joints. There are limited studies on structures response and strength prediction work on hybrid joints that limits its applicability. The aim of present study is to conduct experimental …
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Optimization of Conformal Joints in Axial Tension
… forming process and effectiveness of resulting joints. There has been work done to characterize high strain rate deformation and to couple electro-mechanical systems, but there are still opportunities to provide better and more specific models of joint formation and behavior. A model was …
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Solid-state joining of titanium alloy to stainless steel
… intermetallic compounds (intermetallics) at the joint interface which are detrimental to joint strength. In this study, dissimilar joints between 436L stainless steel and a titanium alloy, Ti 1.2 ASN, were made by the solid-state welding methods of vaporizing foil actuator welding (VFAW) and mash …
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Manufacturing and Evaluation of Kenaf/Polypropylene Honeycomb Cores
… amplitude and trigger force in terms of the joint strength of flat sheets has been determined using a lap shear test. This combination has been applied in joining multiple corrugated sheets to form core materials. The influences of directionalities, cell wall thickness and core depth on the …
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Evaluation of multilayer silicon carbide composite cladding under loss of coolant accident conditions
… corrosion characteristics, high-temperature strength, and a 1000°C higher melting temperature, all of which are important during a loss of coolant accident (LOCA). To improve the performance of SiC cladding, a multilayered architecture consisting of layers of monolithic SiC (mSiC) and SiC/SiC …
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An investigation of perturbation-based balance training as a fall prevention intervention for older adults
… study was to investigate the need for PBBT after strength training in order to improve balance in older adults. A torque-driven, three-segment, musculoskeletal model and forward dynamic simulations were used to address the hypothesis. Increasing joint strength was beneficial in recovering balance …
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Analytics-Driven Cooperative Multi-Robot Additive Manufacturing: Advancing Efficiency and Quality
… and path planning under time, energy, quality, strength, and thermal constraints. This dissertation establishes a comprehensive analytics framework that links robot kinematics and dynamics, process parameters, and cooperation strategies to the resulting process–structure–property relationships …
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Nanosecond Pulsed Laser Processing of Metals and Welding of Metal-Glass Nanocomposites
… laser processing. The welded samples have the joint strength of 4.9 MPa and have great potential for industrial applications. <br/> A 3D analytical model is used to estimate the temperature of the glass after the laser pulse. The increase in temperature is about 129 °C. To induce the bubble in …
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Butt fusion welding of polyethylene pipes
… on the physical and mechanical properties of the joints produced and to investigate these effects on the micro- and macro-structures of the joints produced. A series of welds were made using Eltex Tub 124 and Rigidex 002-50 pipes of 180mm diameter. The fusion pressure and heatsoak times were …
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An Investigation of Plasma Pretreatments and Plasma Polymerized Thin Films for Titanium/Polyimide Adhesion
… of materials. In an effort to improve the strength of the titanium alloy/FM-5 polyimide adhesive joint for aerospace applications, oxygen plasma pretreatments and novel thin plasma polymerized (PP) films were investigated as adhesion promoters. Plasma treatments were carried out using …
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Development of the low damage self-centering Sliding Hinge Joint
The Sliding Hinge Joint (SHJ) is a low damage beam-column connection that rotates inelastically with minimal damage through sliding in Asymmetric Friction Connections (AFCs). The AFC is a type of slotted bolted connection, which is installed in the bottom web and bottom flange bolt groups. Previous …
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