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Showing 1 to 20 of 30 for “"Pultrusion"”.
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Pultrusion of commingled thermoplastic composite materials
… involves the analysis and verification of the pultrusion process. The pultrusion machine at UNLV was improved by modifying the consolidation and the cooling system. A comparative study of the material properties of the pultrusion process and the compression molding were done with the …
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The cooling of a pultrusion process simulator
… device to represent the thermal process of the pultrusion machine. The simulation block utilized temperature variations and compaction pressure to create small samples that represented sections from a pultruded geometry. In this study, the thermal performance of this device was analyzed …
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Fiber Reinforcement Compaction In Resin Injection Pultrusion Process
Resin injection pultrusion is a cost-effective continuous manufacturing process to produce composites of constant cross-section. In this process, fiber reinforcements are continuously pulled through the injection chamber where liquid resin is injected to cause complete wetout of the fibers before …
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Decision support tool for costing of the pultrusion process
… the cost of producing components by the pultrusion process.;The technical cost modeling methodology employed involves dividing the total cost of the process into the individual cost elements that contribute to the total cost. Based upon theoretical considerations, engineering judgements, …
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Modeling the pultrusion process to obtain low void fraction composites
… this work, the various steps of the pultrusion process are analyzed in order that the fraction of voids can be reduced. The goal is to promote uniform resin flow through the glass fibers, while the part is still in the die; this is because increasing resin flow in the die should …
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Fiber compaction and wetout in tapered resin injection pultrusion manufacturing
Pultrusion is a continuous process for manufacturing composite materials with constant cross section. Reinforced fibers are pulled through a resin, possibly folloby a separate injection chamber preforming system, and into a heated die, where the resin undergoes complete wetout. Thus the required …
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Design of a pultrusion die using a design optimization technique
The objective of this study is to design a pultrusion die with a desired temperature profile. Design optimization programs were developed to synthesize the number of cartridge heaters, power input and location of each cartridge heater for a laboratory-scale pultrusion die. This is the first step in …
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Impact of Design Parameters on Detached-Die Tapered Resin Injection Pultrusion
<p>Injection pultrusion is an efficient process for manufacturing composites of continuous lengths with constant cross-section area. The main objective of this study is to compare the performances of the detached-die with the attached-die resin injection chamber configurations. In this work the …
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Asymptotic studies of gravity-driven reacting coating flows and pultrusion processes
Coating flows have many very important applications in engineering. The first part of this thesis deals with gravity-driven reacting coating flows down an inclined plane. When the reaction activation energy is large and heat release is significant, long wave theory and large activation energy …
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Processing parameters and chamber length impact on detached die and attached die resin injection pultrusion
<p>Injection pultrusion is an efficient and highly automated continuous process for high-quality, low-cost, high-volume manufacturing of composites. The main objective of this study is to analyze "attached die configuration" and "detached die configuration" for the better injection pultrusion …
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Quasi-Static and Fatigue Evaluation of Pultruded Vinyl Ester/E-Glass Composites
… the Continuous Resin Transfer Molding (CRTM) pultrusion process were the focus of this research. The tricot stitch and the 6% vinyl ester matrix cure shrinkage were found to play key roles in the quasi-static and fatigue strength and stiffness properties of these laminates. Laminates tested …
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Cure characterization and process modeling of soy-based composites
… the soy-based epoxy resin system was applied in pultrusion process modeling. A finite element model was established and implemented in the commercial ABAQUS code to predict the temperature and the degree of cure of the pultruded soy-based composites. An on-line cure monitoring system was …
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Economics of composite material manufacturing equipment
… Diaphragm Forming, Resin Transfer Molding, Pultrusion, Autoclave Curing and Hand Lay Up. The aim of this paper is to examine the equipment used for these seven processes and to produce a cost analysis for each of the processes equipment. Since many of these processes are relatively new or …
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Application of digital infrared thermography for nondestructive evaluation of composite bridge components
… applications such as quality control during pultrusion of new decks (in factories), during field construction, and field inspection of in-service decks. The technique was also successful in detecting subsurface defects in various other composite components considered in this study. (Abstract …
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Effect of manufacturing process conditions on the durability of pultruded vinyl ester/glass composites
… of structural components. Processes such as pultrusion are cost-effective methods of producing FRPs. This research focused on the durability of pultruded FRP with different processing conditions. Pultruded samples made at different line speeds (4, 8, and 12 ipm) were immersed in water at 25, …
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Cost modeling and design for manufacturing guidelines for advanced composite fabrication
… Resin Transfer Molding, Automated Tow Placement, Pultrusion, Forming, and Assembly. The work includes information on investment costs for production equipment and tooling as well as estimation guidelines for labor and material. Designers are presented with Design for Manufacturing guidelines (DFM) …
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Modeling and Optimization of In-Space Manufacturing to Inform Technology Development
… by an ISM concept that uses thermoplastic pultrusion to produce an 11.6 kg truss structure supporting a 60 kW solar array wing. The approach presented in this thesis is intended for use by space system designers seeking to incorporate ISM into their mission plans, as well as for ISM …
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Studies of structure cracking and fracture strength of E-glass fibres using acoustic emission.
… A laboratory simulation of the impregnation-pultrusion process for the production of E-glass fibre reinforced composites has been established. Using the developed measurement system E-glass strands have been tested at elevated temperature, in the presence of an inert atmosphere, whilst …
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Development of a virtual test facility for axial flow cooling fans
… by different manufacturing techniques, namely pultrusion and moulding. The combined use of the models in the design results in both fans achieving simulated fan static efficiencies of ~55% with no tip clearance and ~50% with tip clearance at the design point. The case study further shows that …
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WEB based cost estimation models for the manufacturing of advanced composites
… (Automated Tow Placement, Forming, Hand Layup, Pultrusion, and Resin Transfer Molding). The CEMs are developed for both novice and expert users by providing default values that can be modified. The expert user can easily overwrite the default values and modify the process plan. All calculations …
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