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 43 for “"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
… 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 looks …
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Investigation of induced thermo-mechanical response and cure kinetics during processing of carbon fiber reinforced plastics.
The manufacture of laminated composite materials using a thermosetting resin matrix is a complex process that can be understood with a knowledge of cure kinetics, heat transfer, and structural mechanics. During laminate manufacture, reinforcing fibers are impregnated with resin and subjected to …
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Tensile and interfacial properties of radially aligned CNT grown carbon fibers
… 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 exhibited enhanced inter- and …
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Drilling of carbon fibre reinforced plastic composites
… focusing on the machinability of carbon fibre reinforced plastics (CFRP), three main phases of experimental work were undertaken to evaluate the drilling of CFRP and associated stack materials. Phase 1 and 2 involved small diameter holes (1.5 mm) in thin CFRP laminates (3 mm thick) while Phase …
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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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Investigation of strain rate sensitivity of polymer matrix composites
… by developing a finite element model for a fibre reinforced polymer (FRP) plates impacted at varying strain rates. The work was divided into three facets, firstly to characterize the FRP material at varying strain rates, to develop a constitutive model to elucidate the relationship between strain …
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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 the …
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Manufacture of aerospace-grade thermoset and thermoplastic composites via nanoengineered thermal processing
… 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 structures is …
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Multi-axial strain monitoring of fibre reinforced thermosetting plastics using embedded highly birefringent optical fibre Bragg sensors
There is a growing interest in the use of fibre reinforced plastics (FRPs) as high-grade construction material for variouw applications that need to be lightweight, yet strong in sometimes harsh loading conditions. Despite the growing popularity of structural composite materials, one has to realize …
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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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Verarbeitung und Eigenschaften von Faserverbundkunststoffen mit Elastomermatrix
Elastomer matrices extend the range of fiber reinforced plastics (FRP). The work presents an overview over materials and processing methods for such E-FRP. First, an overview of low-viscosity elastomer systems is given, which are suitable for E-FRP. Twelve different fiber-matrix-combinations based …
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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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Comparing flexural strength of acrylic processed by three different techniques
… (ASTM) standard D790-03 for flexural strength of reinforced plastics. The specimens were loaded until fracture or 15 mm of displacement on a three-point bending test machine (InstronRTM Model 5565 Universal Testing Machine).;Results: Data from this flexural strength study indicates that SR- Ivocap …
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Hierarchical carbon fiber composites with radially aligned carbon nanotubes : preservation of in-plane tensile properties
… 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 development of …
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