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 28 for “"composite panel"”.
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Fastener withdrawal resistance of wood-based composite panel products
… performance of currently available wood-based panel products as sub-floor materials when used under quality oak strip flooring and exposed to cyclic EMC conditions. The critical evaluation criterion was the fastener holding capacity of various sub-floor materials. To accomplish this, …
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Structural-acoustic design and control of an integrally actuated composite panel
… representative structural element of a single panel offers an analytically tractable basis for examining various control methodologies for mitigating the acoustic response. An electro-mechanical Rayleigh-Ritz structural model is combined with an expression of the acoustic power radiated from a …
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DESIGN [fabrication] BUILD
… to be fully explored by architects, honeycomb composite panel. The result is a kit of parts that is efficient in terms of time and cost in design, production, and assembly, it is offered as an improvement from contracted stick built construction.
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Multidisciplinary Optimization and Damage Tolerance of Stiffened Structures
… of spars, ribs and wing skins; and the local panel optimization which optimizes the design variables of local panels bordered by spars and ribs. The stiffeners are placed on the local panels to increase the stiffness and buckling resistance. The panel thickness, size and shape of stiffeners …
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Analysis of Instabilities in Microelectromechanical Systems, and of Local Water Slamming
… impact of rigid and deformable hull bottom panels by using the coupled Lagrangian and Eulerian formulation in the commercial FE software LS-DYNA. The Lagrangian formulation is used to describe planestrain deformations of the wedge and the Eulerian description of motion for deformations of …
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Advances in elliptical-core two-mode optical fiber sensors
… of the effect of sensor placement within a composite specimen is also presented. Optical fiber sensors are embedded between different laminae of a graphite-epoxy composite panel, and the outputs of the sensors are shown to be proportional to the distance of the sensor from the neutral axis.
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Combined structural and manufacturing optimization of stiffened composite panels
… the design optimization of a blade-stiffened composite panel. For the manufacturing analysis, a one-dimensional resin film infusion model is developed to compute the infiltration time of the resin into a fabric preform of the panel. Results are presented showing the effects of structurally …
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Blending Methods for Composite Laminate Optimization
Composite panel structure optimization is commonly decomposed into panel optimization subproblems, with specified local loads, resulting in manufacturing incompatibilities between adjacent panel designs. Using genetic algorithms to optimize local panel stacking sequences allows panel populations of …
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Optimization Frameworks for Discrete Composite Laminate Stacking Sequences
Composite panel structure optimization is commonly decomposed into panel optimization subproblems, with specified local loads, resulting in manufacturing incompatibilities between adjacent panel designs. Using genetic algorithms to optimize local panel stacking sequences allows panel populations of …
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Optical fiber detection of ultrasonic vibration and acoustic emission
… for detecting acoustic emissions (AE) inside composite structures. The basics of wave propagation inside of materials has been presented along with an overview of typical acoustic emission testing. Surface acoustic waves (SAWs) were studied first and a novel, noncontact optical interferometric …
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Semi-nonstandard construction and its application in post-squatter İstanbul
… of construction that is based on a lightweight composite panel, into which have been collapsed the building's functional requirements (structure, insulation, weatherproofing). As part of their manufacture, the panels are modified utilizing this "semi-nonstandard" fabrication method. This …
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Compression and buckling of composite panels with curvilinear fibers
… response for a symmetrically laminated composite panel with a spatially varying fiber orientation has been analyzed for four different boundary conditions. Variation of the fiber angle along the length of a composite laminate results in stiffness properties that change as a function of …
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A new scheme for the optimum design of stiffened composite panels with geometric imperfections
Thin walled stiffened composite panels, which are among the most utilized structural elements in engineering, possess the unfortunate property of being highly sensitive to geometrical imperfections. Existing analysis codes are able to predict the nonlinear postbuckling behavior of a structure with …
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The effects of process parameters on the properties of resin transfer molded composites
A series of composite panels were fabricated by resin transfer molding (RTM), varying materials and process conditions. Reinforcements used included a fiberglass woven material, and AS-4 carbon in both sized and unsized plain weave fabrics. Vinyl ester, epoxy, and cyanate ester resins were pressure …
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An Evaluation of Optical Fiber Strain Sensing for Engineering Applications
… (such as matrix cracks) in fiber reinforced composite materials. These results indicate that an array of optical fibers which monitor the strain profile on both sides of a composite panel may be sufficient for these purposes
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Thermally-assisted frontal polymerization for rapid curing of fiber-reinforced polymer composites
Fiber-reinforced polymer composites (FRPCs) are widely used in a variety of applications owing to their excellent specific mechanical properties, chemical stability, and fatigue resistance. However, the state-of-the-art technologies for manufacturing FRPCs are intensive in terms of time and energy, …
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Healing of complex damage modes in model composites
… has potential to extend the usable lifetime of composite materials. Introducing self-healing systems to fiber reinforced composites has proven to be difficult due to the high temperatures and pressures of processing as well as the requirement that the delivery scheme for the healing agent must …
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Changes in Oriented Strandboard Permeability During Hot-Pressing
… heat transfer during hot pressing in wood-based composite panel manufacturing is widely accepted as the most important means of heat transport for resin curing. The rate of convective heat transfer to the panel core is controlled by its permeability. Permeability in the plane of the panel also …
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Structural analysis and multidisciplinary design of flexible fluid loaded composite canard
<p>Mechanical performance of a composite canard subject to static aerodynamic loads was numerically studied in the present research. The canard was modeled as a symmetrically laminated curved panel, consisting of 8 plies of T300/5208 graphite/epoxy composite laminate. Modeling of this …
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Vacuum-Assisted Resin Transfer Molding (VARTM) Model Development, Verification, and Process Analysis
… technologies in the manufacturing of primary composite structures in the aircraft industry as well as infrastructure. A great deal of work still needs to be done on efforts to reduce the costly trial-and-error methods of VARTM processing that are currently in practice today. A computer …
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