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 26 for “"fiber reinforced plastics"”.
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Delamination in reinforced concrete retrofitted with fiber reinforced plastics
The addition of fiber-reinforced plastic (FRP) laminates bonded to the tension face of concrete members is becoming an attractive solution to the rehabilitation and retrofit of damaged structural systems. Flexural strength is enhanced with this method but the failure behavior of the system can …
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Evaluation of fiber-matrix interfacial shear strength in fiber reinforced plastics
The role of the interphase in fiberglass reinforced composites was studied by a combination of theoretical analysis, mechanical tests, and several high-resolution analytical techniques. The interphase was varied in composition by using epoxy and polyester matrix polymers with and without added …
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The application of fiber reinforced plastics to the strengthening of masonry structures
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1992.
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A Load-Deflection Study of Fiber-Reinforced Plastics as Reinforcement in Concrete Bridge Decks
… promising solution to the problem is the use of fiber reinforced plastics (FRP) as a replacement for reinforcing steel. The use of FRP as reinforcement has the following advantages of lightweight, high tensile strength, corrosion resistance, flexibility, and electromagnetic resistance. This paper …
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Investigation of induced thermo-mechanical response and cure kinetics during processing of carbon fiber reinforced plastics.
… During laminate manufacture, reinforcing fibers are impregnated with resin and subjected to catalytic conditions. Under these conditions, the resin transforms from liquid to solid as polymer chains form a crosslinked network. During this process, the phenomenological events of gelation and …
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Permeability and Flammability Study of Composite Sandwich Structures for Cryogenic Applications
Fiber reinforced plastics offer advantageous specific strength and stiffness compared to metals and has been identified as candidates for the reusable space transportation systems primary structures including cryogenic tanks. A number of carbon and aramid fiber reinforced plastics have been …
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Flexural Stiffnesses of and Dimensional Stability in Circular Quasi-isotropic Laminate Mirrors
Composite fiber reinforced plastics are being given favorable consideration for emerging applications in large aperture telescopes, such as the Hubble telescope or communication dishes. Many lightweight mirror fabrication concepts are currently being pursued. Presently, the technology is limited …
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Nanoengineered hierarchical advanced composites with nanofiber interlaminar reinforcement for enhanced laminate-level mechanical performance
… materials, specifically advanced carbon fiber reinforced plastics (CFRPs), which are comprised of high specific stiffness and strength continuous carbon microfibers and lightweight, relatively compliant polymers, have been among the most attractive materials and are used extensively in …
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Manufacture of aerospace-grade thermoset and thermoplastic composites via nanoengineered thermal processing
… and stronger, particularly employing carbon fiber reinforced plastics (CFRP) using carbon microfiber reinforcement with thermoset and thermoplastic polymer matrices. With the increasing use of such composites, the need for energy-efficient, cost-effective methods to produce composite …
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Alkaline durability tests for E-glass/vinyl ester-reinforced polymer with nanoclay
Two kinds of GFRP (glass fiber reinforced plastics) composite materials were prepared and used in this study. One was E-glass/vinyl ester glass fiber reinforced polymer (plain GFRP) and the other was nano-GFRP prepared with the addition of 1 wt% of CloisiteRTM 10A nanoclay. These samples were aged …
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Water vapor diffusion through glass fiber reinforced polymer nanocomposites
Fiber reinforced plastics (FRPs) are used to make aircraft structures, highway bridges, automobile components, storage tanks, boat hulls, truck beds, and so on. When these FRPs are exposed to the atmosphere, environmental humidity can weaken the structural integrity and cause fiber delamination. …
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A feasibility study on using surface treated kaolin mineral in thermoplastic composites
Glass fiber reinforced plastics are the current state of the art, mainly in automotive manufacturing applications. With the industry’s trend towards weight reduction for fuel economy and enhanced performance, an improvement in material composition is needed. This thesis investigates the possibility …
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Investigation of the Strength and Ductility of Reinforced Concrete Beams Strengthed with CFRP Laminates
The use of fiber reinforced plastics (FRP) in repairing and strengthening bridges has been researched in recent years. In particular, attaching unidirectional FRP to the tension face of reinforced concrete beams has provided an increase in stiffness and load capacity of the structure. However, due …
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Tensile and interfacial properties of radially aligned CNT grown carbon fibers
… mass-specific strength and stiffness of carbon fibers (CFs) has established CF reinforced plastics (CFRPs) as the benchmark material for next-generation aerospace structures. While CFRPs with radially-grown aligned carbon nanotubes (CNTs), termed fuzzy fiber reinforced plastics (FFRPs), have …
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Hierarchical carbon fiber composites with radially aligned carbon nanotubes : preservation of in-plane tensile properties
… on woven alumina filaments to form a "fuzzy fiber" reinforced plastic (FFRP) architecture with demonstrated improvements in inter- and intra-ply mechanical properties as well as multifunctional enhancement via tailorable electrical and thermal conductivities. However, thus far, the …
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Low Cost Manufacturing and Performance Evaluation of Soy-based Polyurethane/E-glass Composites
… regulatory and economic factors. Glass reinforced composites are very popular in construction and in the boat building industry because of their low cost material and low manufacturing cost. The popular thermoset resins in such applications are unsaturated polyester and vinyl ester, …
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New generation fiber reinforced polymer composites incorporating carbon nanotubes
… last five decades observed an increasing use of fiber reinforced polymer(FRP) composites as alternative construction materials for aerospace and infrastructure. The high specific strength of FRP attracted its use as non-corrosive reinforcement. However, FRP materials were characterized with a …
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Manufacturing and fracture of hierarchical composite materials enhanced with aligned carbon nanotubes
… comprised of both nano- and micro-scale fibers are currently being studied as next-generation materials for multifunctional aerospace applications. Carbon nanotubes (CNTs) are an attractive reinforcing fiber for aerospace composites due to their scale and superior specific stiffness and …
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Computational and Experimental Nano Mechanics
… the mechanical properties of conventional carbon fiber composites by introducing 1D nano fillers to them. Particularly, their viscoelastic and viscoplastic behavior are studied extensively and different modeling techniques are utilized. Conventional structural materials are being replaced with the …
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Detection and characterization of impact damage in carbon fiber aircraft fuselage structure
… and characterize damage in full-scale carbon fiber fuselage structure. It also examines embedded and bonded methods of deploying an in-situ fiber optic (FO) Swept Wavelength Interferometry (SWI) strain sensing system for damage detection. The hypothesis is that the more advanced scanning …
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