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Relevant bibliographies by topics / Resin transfer moulding (RTM)

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Academic literature on the topic 'Resin transfer moulding (RTM)'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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Journal articles on the topic "Resin transfer moulding (RTM)"

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Johnson, M. S., C. D. Rudd, and D. J. Hill. "Cycle Time Reductions in Resin Transfer Moulding Using Microwave Preheating." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 209, no. 6 (December 1995): 443–53. http://dx.doi.org/10.1243/pime_proc_1995_209_108_02.

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Resin transfer moulding (RTM) offers a potential manufacturing source of high-volume, fibre-reinforced plastic (FRP) components for the automotive industry. Currently, market development is inhibited by long moulding cycle times which are dominated by the effects of mould quench. Preheating of the thermosetting resin prior to injection would reduce these effects, leading to shorter mould filling and curing times. This paper characterizes the thermal cycle in RTM and outlines the application of microwave technology for resin preheating. Batch preheating of preactivated resin systems is discussed and the development of an in-line microwave resin preheater is described for uncatalysed and catalysed resin systems under steady flow conditions. The integration of an in-line preheating system within a demonstration RTM facility is described and the effects of preheating on the thermal cycle are presented.

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Van Melick, H. G. H., G. A. A. V. Haagh, F. N. Van De Vosse, and T. Peijs. "Simulation of Mould Filling in Resin Transfer Moulding." Advanced Composites Letters 7, no. 1 (January 1998): 096369359800700. http://dx.doi.org/10.1177/096369359800700102.

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Resin transfer moulding is a production method of fibre reinforced plastics which involves the flow of a resin through a mould packed with dry reinforcement. As simulation by finite element code can be a useful tool in designing the mould or optimising the process, mathematical modelling of RTM is indispensable. The equations concerning the isothermal RTM process with a Newtonian fluid are implemented in the finite element program VI p, applying the ‘thin film approximation’. To validate the code, model experiments are performed in which the position of the front as a function of time is monitored and compared to the results of a finite element simulation. A good agreement between simulation and experiment was found. For further validation of more complex mould geometries a plate with inserts is considered. Again good agreement was found between simulation and experiment was found. The finite element code of VI p proves to give reliable and accurate results in the simulation of the isothermal filling process of RTM and can therefore be used for designing mould geometries or optimisation of the RTM process as a whole.

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Ferreira Luz, F., Sandro Campos Amico, A. de Lima Cunha, E. Santos Barbosa, and Antônio Gilson Barbosa de Lima. "Applying Computational Analysis in Studies of Resin Transfer Moulding." Defect and Diffusion Forum 326-328 (April 2012): 158–63. http://dx.doi.org/10.4028/www.scientific.net/ddf.326-328.158.

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Resin Transfer Moulding (RTM) as it is most known process in the Resin Injections family, is an extensively studied and used processing method. This process is used to manufacture advanced composite materials made of fibres embedded in a thermoset polymer matrix. Fibre reinforcement in RTM processing of polymer composites is considered as a fibrous porous medium regarding its infiltration by the polymer resin. In this sense, the present work aims the computational analysis of a fluid in a porous media for a RTM composite moulding by using the ANSYS CFX® commercial software. In order to validate the numerical study of the fluid flow in a known RTM system, experiments was carried out in laboratory to characterize the fluid (vegetal oil) flowing into the porous media (0/90 glass fibre woven), were pressure and fibre volume fraction have been fixed. The numerical simulation provides information about volume fraction, pressure and velocity distribution of the phases (resin and air) inside the porous media. The predicted results were compared with the experimental data and its has shown a solid relationship between them.

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Owen, M. J., V. Middleton, and C. D. Rudd. "Fibre reinforcement for high volume resin transfer moulding (rtm)." Composites Manufacturing 1, no. 2 (June 1990): 74–78. http://dx.doi.org/10.1016/0956-7143(90)90239-s.

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Bickerton, S., and P. A. Kelly. "Application of a Complete Tooling Force Analysis for Simulation of Liquid Composite Moulding Processes." Key Engineering Materials 334-335 (March 2007): 17–20. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.17.

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The term Liquid Composite Moulding (LCM) encompasses a growing list of composite manufacturing processes. The focus of this paper is prediction of tooling forces for Resin Transfer Moulding (RTM). Previous experimental work has demonstrated the influence of reinforcement compaction behaviour, which is strongly non-elastic. A viscoelastic compaction model has been developed which addresses both dry and wet response, and is implemented in RTM simulations of simple flat parts. Non-planar geometries introduce a tangential stress acting on mould surfaces, due to shear of the reinforcement. The tooling force analysis is extended to complex parts using an existing RTM filling simulation, LIMS, which has been developed at the University of Delaware.

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Dong, Yin Fei, and Xue Jian Jiao. "The Simulation of RTM Based on FLUENT." Advanced Materials Research 538-541 (June 2012): 873–76. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.873.

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RTM is also called resin transfer moulding, it is one of the leading technology in the field of FRP. With the help of FLUENT, a powerful computational fluid dynamics software, we have finished the process simulation of filling the mould. In the process simulation, the flow striker, pressure field and velocity field are clearly showed. And they can describe the process of RTM effectively.

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McGovern, Scott, and P. Y. Ben Jar. "The Use of Low Pressure Compression in Resin Transfer Moulding to Enhance the Fibre Volume Fraction of Composite Materials." Advanced Composites Letters 8, no. 6 (November 1999): 096369359900800. http://dx.doi.org/10.1177/096369359900800602.

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A low-pressure compression was applied after complete resin injection in the manufacture of resin transfer moulded (RTM) glass-fibre-reinforced laminates. Representative laminates were produced and their fibre volume fraction's ( Vf's) compared with that of laminates manufactured under conventional vacuum-driven RTM. The intralaminar and overall Vf's were examined from images generated through scanning electron microscopy (SEM), and each manufacturing process was compared for its ability to produce uniform high Vf composites.

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Ruiz, Edu, Francois Trochu, and Raymond Gauvin. "Internal Stresses and Warpage of Thin Composite Parts Manufactured by RTM." Advanced Composites Letters 13, no. 1 (January 2004): 096369350401300. http://dx.doi.org/10.1177/096369350401300105.

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Resin transfer moulding (RTM) is a widely used manufacturing technique of composite parts. A proper selection of process parameters is the key to yield successful moulding results and obtain a good part. Among other things, when thermoset resins are processed, the shrinkage that occurs due to the polymerisation reaction further complicates the situation. In this paper, a finite difference analysis is proposed to simulate the effect of thermal and rheological changes during thin plates cooling after processing. Classical Laminate Theory is here implemented to compute composite internal stresses resulting from these thermo-rheological conditions. Laminate stresses are then computed and warpage obtained with the proposed numerical algorithm. Samples of thin plates were moulded combining two glass reinforcement materials. During cooling, after processing plates warpage was recorded and results compared to model predictions. This analysis presents the basis of a further numerical optimisation for thick composite parts.

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Schmachtenberg, E., J. Schulte zur Heide, and J. Töpker. "Application of ultrasonics for the process control of Resin Transfer Moulding (RTM)." Polymer Testing 24, no. 3 (May 2005): 330–38. http://dx.doi.org/10.1016/j.polymertesting.2004.11.002.

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Lekakou, C., and M. G. Bader. "Mathematical modelling of macro- and micro-infiltration in resin transfer moulding (RTM)." Composites Part A: Applied Science and Manufacturing 29, no. 1-2 (January 1998): 29–37. http://dx.doi.org/10.1016/s1359-835x(97)00030-4.

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Dissertations / Theses on the topic "Resin transfer moulding (RTM)"

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Rudd, Christopher. "Preform processing for high volume resin transfer moulding (RTM)." Thesis, University of Nottingham, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543834.

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Sakka, Aymen. "Investigation of Heat Conduction Through PMC Components Made Using Resin Transfer Moulding." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23508.

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The increasing demand for polymer matrix composites (PMCs) from the airframe industry raises the issues of productivity, cost and reproducibility of manufactured PMC components. Performance reproducibility is closely related to the manufacturing technique. Resin transfer moulding (RTM) offers the advantage of flexible manufacturing of net-shape PMC components with superior repeatability starting from ready-to-impregnate dry reinforcements. An RTM apparatus was developed for manufacturing PMC plates and demonstrator components representative of actual, PMC components and PMC moulds made and used in the airframe industry. The RTM process developed in this work involved making net-shape dry carbon fibre preforms and impregnating them an epoxy resin, targeting mould applications. Thermal repeatability of different net-shape PMC components manufactured using the RTM apparatus developed in-house was investigated. Effects of bonding an outer copper plate onto the PMC material, targeting mould applications known as integrally heated copper tooling (IHCT), were explored. Heat conduction through the PMC components was studied using simulation models validated by experimental data obtained primarily by thermography. Manufactured PMC components showed good repeatability, particularly in terms of thermal behaviour. The IHCT technique was found to be well suited for mould applications. Expected advantages of thermography were materialised. Finally, the simulation models developed were in good agreement with experimental data.

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Schulte, zur Heide Jan. "Analyse des Harzinjektionsverfahrens für die Verarbeitung flammgeschützer, partikelgefüllter Harzsysteme = Analysis of the resin transfer moulding (RTM) processfor the processing of fire retardant, particle-filled resin systems /." Aachen : Mainz, 2008. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=017087647&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Dippenaar, D. J. "A technical and economical evaluation of RP technology for RTM tooling." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4193.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2010.
ENGLISH ABSTRACT: This project investigates the use of Rapid Prototyping (RP), with specific focus on Three Dimensional Printing (3DP), in the manufacture of complex shaped advanced composite parts, using variants of the Resin Transfer Moulding (RTM) method of composite manufacture. This study developed design guidelines, cost models and a process chain by studying data obtained by making example parts, from literature and consultation with industry. Advanced composite materials offer some of the best low weight and high specific strength properties for the solution of design problems. A major disadvantage of these processes, however, is the low production rates possible and the need of costly moulds. The 3DP technologies combined with the RTM composite process was found to enable a lowering of costs and increase in productivity if smaller batch sizes are considered. The most meaningful area of application for RP techniques seems to be for smaller and more complex components. The geometrical freedom allowed by RP technologies allowed the manufacture of parts which are challenging to manufacture by conventional technology such as CNC machining. Example part case studies were completed for a simple part utilising the one sided mould Resin Infusion RTM variant as well as for a complex part utilising the closed mould Vacuum Assisted Resin Transfer Moulding (VARTM) process variant. During these two case studies it was clear that proper part infusion with resin is critical for the manufacture of good quality composite parts free of voids and dry spots. It is possible to improve the resin infusion by correct placement of resin inlet and outlet ports as well as resin channels incorporated in the mould. Correct placement of these features for the case studies was obtained through simulations done with RTM-Worx software. Results also indicated that another useful application of RP technology to RTM is the manufacture of disposable cores for parts with thick cross sections. Resin channels were included on the surface of these cores to improve the mould filling with resin and consequently part quality. An early cost estimation model, based on the work of Veldsman (1995), was developed for the combined RP and RTM manufacturing process. This model may help designers to eliminate expensive design features and enables a quick cost comparison with competing processes. Drawbacks of applying RP techniques to RTM include the limited lifetime of moulds produced with 3DP and the size and accuracy limitations of the RP t echnology.
AFRIKAANSE OPSOMMING: Hierdie projek handel oor die toepassing van die drie-dimensionele druk metode van Snel-Prototipering (Rapid Prototyping) op die vervaardiging van komplekse gevorderde saamgestelde materiaal komponente met die Hars-Inspuit Giet (Resin Transfer Moulding) metode. Die projek behels die opstel van ontwerpsriglyne, koste-modelle en ’n proses-ketting deur data te bestudeer wat bekom is deur middel van die vervaardiging van eksperimentele parte, literatuurstudie asook raadpleging met individue in die industrie. Gevorderde saamgestelde materiale verskaf van die beste sterk, dog ligte oplossings vir sekere ontwerpsprobleme. ’n Ernstige nadeel van hierdie materiale is egter die stadige produksietempo moontlik en die vereiste van duur gietstukke. Die Snel- Prototipering metodes, gekombineerd met ’n saamgestelde materiaal vervaardigingsproses, maak laer kostes met beter produktiwiteit moontlik indien ontwerpers die part grootte- en akkuraatheidsbeperkings in ag neem. Die mees betekenisvolle area van toepassing blyk kleiner en meer komplekse komponente te wees. Die vryheid in geometrie wat moontlik gemaak word deur die Snel- Prototipering tegnologie laat die vervaardiging toe van parte wat uitdagend is om te vervaardig met konvensionele tegnologie soos CNC masjinering. ’n Gevallestudie is voltooi vir ’n eenvoudige part vervaardig met die enkelkant gietstuk vakuum-infusie weergawe van die Hars-Inspuit Giet metode asook vir ’n komplekse part wat vervaardig is met die geslote gietstuk Vakuum Hars-Inspuit Giet weergawe van die basiese metode. Dit het tydens die twee gevallestudies duidelik geword dat deeglike hars infusie van kritieke belang is vir die vervaardiging van goeie kwaliteit parte sonder enige droë kolle of lugruimtes. Dit is moontlik om die hars infusie te verbeter deur hars inlate en uitlate asook hars kanale in die korrekte posisies te plaas. Die korrekte posisies vir hierdie komponente is verkry deur middel van ’n reeks simulasies met die RTM-Worx sagteware. Resultate dui ook daarop dat Snel-Prototipering tegnologie handig te pas kom by die vervaardiging van verbruikbare kerne vir saamgestelde materiaal parte met groter diktes. Hars kanale kan maklik op die kerne se oppervlak geskep word om die hars verspreiding en gevolglik part kwaliteit te verbeter. ’n Vroeë kostevoorspellings model, gebaseer op werk voltooi deur Veldsman (1995), is saamgestel vir die gekombineerde Snel-Prototipering en Hars-Inspuit Giet proses. Hierdie model kan gebruik word om duur ontwerpsbesonderhede op parte te elimineer en om ’n vinnige koste vergelyking met ander vervaardigingsprosesse te toon. Nadele van die toepassing van Snel-Prototipering tegnieke op Hars-Inspuit Giet sluit die beperkte gietstuk-leeftyd en beperkte akkuraatheid in.

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Dvořák, Vlastimil. "Návrh křidélka z kompozitních materiálů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228273.

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This diploma thesis called „Aileron Design of Composite Materials” deals with the technologies of production used in aricraft industries. It shows appropriate conceptions of composite structures for the airplane aileron of Aero L-159A/B as well as a proposal of an accetable structure for RTM process.

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Rojas, Mariana. "Energy Efficient Composites for Automotive Industry." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-86091.

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Hybrid composites play a key role in sustainable development. For many years, carbon fibres in an epoxy matrix have been an attractive option for many structural applications because of their higher specific mechanical properties mostly. However, recycling and sustainability are some of the composite shortcomings; and in that context, natural fibres have gained popularity. The present study aimed to design and manufacture short carbon/flax hybrid composites. Two different arrangements were chosen: random and layers configuration. Resin Transfer Moulding (RTM) was used to fabricate these hybrid composites. Mechanical tests and optical microscopy technique were conducted to understand the effect of the interaction of these two different reinforcements. Mechanical tests showed a remarkable difference between the hybrid configurations under flexural loadings. Furthermore, outstanding property values were observed in the hybrid configurations compared to single fibre composites. The resultant materials have seemed an attractive combination of fibres with a remarkable balance between mechanical performance and eco-friendliness.

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Lowe, Julian Robert. "Void formation in resin transfer moulding." Thesis, University of Nottingham, 1993. http://eprints.nottingham.ac.uk/11626/.

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In recent years interest has grown in the use of composite components within the automotive industry. Fibre reinforced plastic (FRP) components are of particular interest to the industry, since lower tooling costs and part consolidation can be utilised, whilst lighter, stiffer components can be produced. Several methods are available to produce FRP components at high volumes, including compression moulding (using dough and sheet moulding compounds), reinforced reaction injection moulding (RRIM) and liquid moulding processes (resin transfer moulding (RTM) and structural reaction injection moulding (SRIM)). RTM is a closed mould process, which is widely used to produce components economically in low volumes using matched moulds to produce two good surfaces. The absence of a high volume manufacturing technology, however, has impeded the acceptance and advance of RTM within the automotive industry. A research programme was established at the University of Nottingham to address the problems associated with the use of RTM for high volume manufacture. This programme has considered the topics of process technology, processing characteristics of polyester resin systems and fibre preforms, fibre wet-out and interfacial bonding, mould design, microwave pre-heating of reactive resin systems and process modelling. This thesis concerns the research which was undertaken to identify the causes of void formation during the impregnation and polymerisation stages of RTM, and methods of reducing the final void content within the component. The impregnation phase of the RTM process was identified as being the stage where the majority of voids were formed. A study of oil impregnation (having a similar viscosity to that of resin) into reinforcement was undertaken to determine the reasons for uneven flow and air entrapment. The dry reinforcements were studied to assess the microstructure of the preforms in order to determine reasons for obstruction of the resin flow. Fabric stitching, thermoplastic binder and size deposits were identified as potential causes of flow impediment. Fibre orientation and preform stacking were also assumed to assist in the development of uneven flow, leading to air entrapment. A major factor determining the formation of microvoids within fibre bundles was identified as the transverse impregnation of resin into high Tex fibre bundles. The major moulding process variables of injection pressure, vent pressure, fibre volume fraction, mould temperature and resin pre-heating have been assessed, to determine their effect on the void content within unidirectional and CFRM reinforced polyester laminates. It was observed that vacuum assistance during impregnation reduced void formation, although higher exotherm pressures and the possibility of monomer boiling arise from its use. A simple impregnation model was developed to assess the microscopic impregnation rates between fibre bundles, in the capillary between fibres and transversely into fibre bundles. The results from this model were compared with actual moulding histories. The findings of the overall work are discussed and suggestions proposed for the reduction of void content in RTM automotive components.

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Al-Hamdan, Ali. "Resin transfer moulding of sandwich structures." Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362997.

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Weitzenböck, Jan Rüdiger. "Flow characterization in resin transfer moulding." Thesis, University of Southampton, 1996. https://eprints.soton.ac.uk/403475/.

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Hill, David John. "Microwave preheating of thermosetting resin for resin transfer moulding." Thesis, University of Nottingham, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300723.

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Books on the topic "Resin transfer moulding (RTM)"

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Potter, Kevin. Resin Transfer Moulding. Dordrecht: Springer Netherlands, 1997.

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Resin transfer moulding. London: Chapman & Hall, 1997.

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Potter, Kevin. Resin Transfer Moulding. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0021-9.

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Kruckenberg, Teresa M., and Rowan Paton, eds. Resin Transfer Moulding for Aerospace Structures. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-4437-7.

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Kruckenberg, Teresa M. Resin Transfer Moulding for Aerospace Structures. Dordrecht: Springer Netherlands, 1998.

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David, Abraham. Resin transfer moulding component design and manufacture. [s.l: The Author], 1997.

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Semling, Marcus. Minimisation of filling time in resin transfer moulding. [s.l.]: typescript, 1999.

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Wazzan, A. Investigation into a new route to rubber-toughened epoxy resin composites using resin transfer moulding. Manchester: UMIST, 1995.

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Potter, Kevin. Resin Transfer Moulding. Chapman & Hall, 2011.

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Resin Transfer Moulding for Aerospace Structures. Springer, 2012.

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Book chapters on the topic "Resin transfer moulding (RTM)"

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Potter, Kevin. "RTM theory." In Resin Transfer Moulding, 1–27. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0021-9_1.

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Potter, Kevin. "Materials for RTM." In Resin Transfer Moulding, 28–51. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0021-9_2.

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Potter, Kevin. "Flexible tool RTM." In Resin Transfer Moulding, 167–79. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0021-9_7.

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Potter, Kevin. "Thick section RTM." In Resin Transfer Moulding, 180–83. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0021-9_8.

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Potter, Kevin. "Troubleshooting RTM processing problems." In Resin Transfer Moulding, 188–99. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0021-9_10.

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Potter, Kevin. "RTM mould tool design." In Resin Transfer Moulding, 74–145. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0021-9_4.

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Potter, Kevin. "Component design for RTM." In Resin Transfer Moulding, 152–66. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0021-9_6.

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Potter, Kevin. "Known applications of RTM processing." In Resin Transfer Moulding, 184–87. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0021-9_9.

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Potter, Kevin. "Suggestions for good practice in the design and development of RTM components." In Resin Transfer Moulding, 200–203. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0021-9_11.

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Flemming, Manfred, Gerhard Ziegmann, and Siegfried Roth. "Die Resin Transfer Moulding (RTM)-Technik." In Faserverbundbauweisen, 209–316. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-58371-1_6.

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Conference papers on the topic "Resin transfer moulding (RTM)"

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Aduriz, Xavier-Alexandre, Cyril Lupi, Jean-Luc Bailleul, Vincent Sobotka, Dominique Leduc, Nicolas Boyard, Nicolas Lefevre, et al. "Fibre optics sensors applied to resin transfer moulding (RTM) in aeronautic: composite materials process optimization." In Photonics Europe, edited by Brian Culshaw, Anna G. Mignani, Hartmut Bartelt, and Leszek R. Jaroszewicz. SPIE, 2006. http://dx.doi.org/10.1117/12.662607.

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Shahnazari, M. R., and A. Abbassi. "Transient Numerical Simulation of Non-Isothermal Process of RTM." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45699.

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In this paper, based on a physical model the resin transfer moulding (RTM) of a non-isothermal process has been simulated. It is assumed that the flow in porous medium is under the Darcian regime. Also, the relationship between flow mean velocity in each section has been considered in terms of porosity. The governing equations including heat dispersion term are solved numerically. To verify the model results, the temperature profiles for two types of fibers have been calculated, and are compared with experimental results of other researchers. The results showed that, to optimize the better quality of production of composite materials, the importance of heat dispersion term can not be neglected.

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Desplentere, Frederik, Ignaas Verpoest, Stepan Lomov, and Martin Zatloukal. "Stochastic Flow Modeling for Resin Transfer Moulding." In NOVEL TRENDS IN RHEOLOGY III: Proceedings of the International Conference. AIP, 2009. http://dx.doi.org/10.1063/1.3203279.

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Summerscales, J., C. Hoppins, P. Anstice, N. Brooks, J. Wiggers, D. Yahathugoda, A. Harper, C. Wood, and M. Cooper. "In-Mould Gel Coating for Resin Transfer Moulding." In Marine & Offshore Composites. RINA, 2010. http://dx.doi.org/10.3940/rina.moc10cd.2010.08.

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Golestanian, Hossein. "Resin Velocity and Pressure Distribution in Resin Transfer Molding of a Composite Cylinder." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72359.

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Abstract:

Resin Transfer Molding (RTM) process in the manufacturing of a composite cylinder is investigated. Resin flow in the woven fiber mat is modeled as flow through porous media to determine resin velocity and pressure distribution along the part. Five-harness carbon and eight-harness fiberglass mats with epoxy resin composites are investigated. Fiber mat permeability for the two fiber types are determined experimentally. These values are then employed in numerical models to simulate the injection cycle of the RTM process. ANSYS finite element software is used to perform the analysis. The results indicate that resin velocity in fiberglass mats is almost six times the velocity in carbon fiber mats. This is due to the higher permeability of fiberglass mats. The sharp drop in the resin velocity into carbon fibers indicates that flow problems will exist in the manufacturing of large carbon/epoxy parts with RTM processes.

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Bruno Moura Miranda, Wanderley Ferreira de Amorim, Francisco Procópio Batista Neto, and Diego Davi da Silva Diniz. "Design and Fabrication of a Laboratorial Resin Transfer Moulding Equipment." In 23rd ABCM International Congress of Mechanical Engineering. Rio de Janeiro, Brazil: ABCM Brazilian Society of Mechanical Sciences and Engineering, 2015. http://dx.doi.org/10.20906/cps/cob-2015-1188.

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7

Hsiao, Kuang-Ting. "Uncertainty Modeling of Residual Stress Development in Polymeric Composites Manufactured With Resin Transfer Molding Process." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42226.

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Resin Transfer Molding (RTM) is an advanced process to manufacture high quality thermoset polymeric composites. The quality of the composite depends on the resin infusion stage and the cure stage during the RTM process. The resin curing is a complex exothermic process which involves resin mechanical property evolution, resin volume shrinkage, thermal expansion, heat transfer, and chemical reaction. Since the fibers and resin have many differences in their physical properties, the composite cure stage inevitably introduces the undesired residual stress to the composite parts. As the residual stress could sometimes generate local matrix failure or degrade the performance of the composite, it is important to model and minimize the residual stress. This paper presents a model to predict the residual stress development during the composite cure process. By slightly disturbing the manufacturing parameters such as the mold heating cycle and the cure kinetics of polymer, the variations of residual stress development during the RTM process can be modeled and compared. A parametric uncertainty study of the residual stress development in the polymeric composite manufactured with RTM will be performed and discussed.

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8

Correia, N. C., F. Robitaille, A. C. Long, C. D. Rudd, P. Sˇima´cˇek, and S. G. Advani. "Use of Resin Transfer Molding Simulation to Predict Flow, Saturation and Compaction in the VARTM Process." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39696.

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Vacuum Assisted Resin Transfer Molding (VARTM) and Resin Transfer Molding (RTM) are among the most significant and widely used Liquid Composite manufacturing processes. In RTM preformed-reinforcement materials are placed in a mold cavity, which is subsequently closed and infused with resin. RTM numerical simulations have been developed and used for a number of years for gate assessment and optimization purposes. Available simulation packages are capable of describing/predicting flow patterns and fill times in geometrically complex parts manufactured by the resin transfer molding process. Unlike RTM, the VARTM process uses only one sided molds (tool surfaces) where performs are placed and enclosed by a sealed vacuum bag. To improve the delivery of the resin, a distribution media is sometimes used to cover the preform during the injection process. Attempts to extend the usability of the existing RTM algorithms and software packages to the VARTM domain have been made but there are some fundamental differences between the two processes. Most significant of these are 1) the thickness variations in VARTM due to changes in compaction force during resin flow 2) fiber tow saturation, which may be significant in the VARTM process. This paper presents examples on how existing RTM filling simulation codes can be adapted and used to predict flow, thickness of the preform during the filling stage and permeability changes during the VARTM filling process. The results are compared with results obtained from an analytic model as well as with limited experimental results. The similarities and differences between the modeling of RTM and VARTM process are highlighted.

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9

DEREIMS, ARNAUD, SELINA ZHAO, HANG YU, PRAVEEN PASUPULETI, MARK DOROUDIAN, WILLIAM RODGERS, and VENKAT AITHARAJU. "Compression Resin Transfer Molding (C-RTM) Simulation Using a Coupled Fluid-solid Approach." In American Society for Composites 2017. Lancaster, PA: DEStech Publications, Inc., 2017. http://dx.doi.org/10.12783/asc2017/15224.

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10

D’Silva, Kiran M., Su-Seng Pang, and Kurt C. Schulz. "Effects of Weirs on the Resin Transfer Molding Process." In ASME 2001 Engineering Technology Conference on Energy. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/etce2001-17001.

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Abstract Low mold filling time and improper fiber wetting are the main problems faced by the manufacturers applying the Resin Transfer Molding (RTM) process. The objective of this work was to minimize these problems and to study the effect of weirs on the RTM process. A mold was designed such that the lower mold plate contains two weirs, one at the resin inlet port and the other at the outlet port. The purpose of adding the weirs is to provide a continuous inlet stream near the resin inlet port and to cause backpressure near the outlet port to induce complete mold filling. Laminated plates were prepared using glass fibers and epoxy resin (combination of EPON resin-862 and curing agent W). The test parameters investigated, such as void contents, dry spots and mold filling time, were compared with those of samples that were prepared without the use of weirs. It was found that the presence of weirs resulted in significant elimination of dry spots, minimization of void contents and a reduction in mold filling time. As a result, the cost required to manufacture composite parts can be reduced by the use of weirs. In addition to the experimental investigation, a computer simulation (using LCMFLOT software) of resin flow inside the mold cavity was conducted. Many simulations were run in order to optimize the height and shape of the weir. Rectangular weirs of height 2.54 mm showed minimum mold fill time. It was found that the results obtained from the experimental work and flow simulations are in good agreement. Based on this work, it is evident that complex parts can be produced in less cycle time if weirs are positioned at appropriate locations.

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Reports on the topic "Resin transfer moulding (RTM)"

1

Rempe, Dale A. Process Control for Resin Transfer Molding (RTM). Fort Belvoir, VA: Defense Technical Information Center, February 1996. http://dx.doi.org/10.21236/ada305374.

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2

Deteresa, S., W. Stein, and V. R. Yagi. Design Analysis of Resin Transfer Molding (RTM) of Fiber Composite Panels Final Report CRADA No. TC-333-92. Office of Scientific and Technical Information (OSTI), March 2018. http://dx.doi.org/10.2172/1430941.

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