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An Analytical Vacuum Assisted Resin Transfer Molding Vartm Flow Model
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Book Synopsis An Analytical Vacuum-Assisted Resin Transfer Molding (VARTM) Flow Model by :
Download or read book An Analytical Vacuum-Assisted Resin Transfer Molding (VARTM) Flow Model written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A closed form solution for the flow of resin in the vacuum-assisted resin transfer molding (VARTM) process is used extensively for affordable manufacturing of large composite structures. During VARTM processing, a highly permeable distribution medium is incorporated into the preform as a surface layer. During infusion, the resin flows preferentially across the surface, simultaneously through the preform, to a complex flow front. The analytical solution presented here provides insight into the scaling laws governing fill times and resin inlet placement as a function of the properties of the preform, distribution media, and resin. The formulation assumes that the flow is fully developed and is divided into two areas: (1) a saturated region with no cross flow, and (2) a flow front region, which moves with a uniform velocity, where the resin is infiltrating into the preform from the distribution medium. The law of conservation of mass and Darcy's Law for flow through porous media are applied in each region. The resulting equations are nondimensionalized and are solved to yield the flow front shape and the development of the saturated region. It is found that the flow front is parabolic in shape, and the length of the saturated region is proportional to the square root of the time elapsed. The obtained results are compared to data from fill-scale simulation and show good agreement. The solution allows greater insight into the physics process, enables parametric and optimization studies, and can reduce the computational cost of full-scale, three-dimensional (3-D) simulations.
Book Synopsis An Analytical Vacuum-Assisted Resin Transfer Molding (VARTM) Flow Model by : Bruce K. Fink
Download or read book An Analytical Vacuum-Assisted Resin Transfer Molding (VARTM) Flow Model written by Bruce K. Fink and published by . This book was released on 2000-10-01 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: A closed form solution for the flow of resin in the vacuum-assisted resin transfer molding (VARTM) process is used extensively for affordable manufacturing of large composite structures. During VARTM processing, a highly permeable distribution medium is incorporated into the preform as a surface layer. During infusion, the resin flows preferentially across the surface, simultaneously through the preform, to a complex flow front. The analytical solution presented here provides insight into the scaling laws governing fill times and resin inlet placement as a function of the properties of the preform, distribution media, and resin. The formulation assumes that the flow is fully developed and is divided into two areas: (1) a saturated region with no cross flow, and (2) a flow front region, which moves with a uniform velocity, where the resin is infiltrating into the preform from the distribution medium. The law of conservation of mass and Darcy's Law for flow through porous media are applied in each region. The resulting equations are nondimensionalized and are solved to yield the flow front shape and the development of the saturated region. It is found that the flow front is parabolic in shape, and the length of the saturated region is proportional to the square root of the time elapsed. The obtained results are compared to data from fill-scale simulation and show good agreement. The solution allows greater insight into the physics process, enables parametric and optimization studies, and can reduce the computational cost of full-scale, three-dimensional (3-D) simulations.
Book Synopsis Process Modeling in Composites Manufacturing by : Suresh G. Advani
Download or read book Process Modeling in Composites Manufacturing written by Suresh G. Advani and published by CRC Press. This book was released on 2010-07-14 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a wealth of literature on modeling and simulation of polymer composite manufacturing processes. However, existing books neglect to provide a systematic explanation of how to formulate and apply science-based models in polymer composite manufacturing processes. Process Modeling in Composites Manufacturing, Second Edition provides tangible m
Book Synopsis Experimental Validation of a Closed-form Fluid Flow Model for Vacuum-assisted Resin-transfer Molding by : Bruce K. Fink
Download or read book Experimental Validation of a Closed-form Fluid Flow Model for Vacuum-assisted Resin-transfer Molding written by Bruce K. Fink and published by . This book was released on 2001 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Manufacturing Techniques for Polymer Matrix Composites (PMCs) by : Suresh G Advani
Download or read book Manufacturing Techniques for Polymer Matrix Composites (PMCs) written by Suresh G Advani and published by Elsevier. This book was released on 2012-07-18 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer matrix composites are used extensively across a wide range of industries, making the design and development of effective manufacturing processes of great importance. Manufacturing techniques for polymer matrix composites (PMCs) provides an authoritative review of the different technologies employed in the manufacture of this class of composite. Following an introduction to composites and manufacturing processes, part one reviews the manufacturing of short fiber and nanoparticle based polymer matrix composites, with injection and compression molding examined in depth. Thermoplastic processing is the focus of part two. Sheet forming, fabric thermostamping, filament winding and continuous fiber reinforced profiles are investigated. Part three reviews thermoset processing. A survey of resin transfer molding follows, including vacuum-assisted and compression resin transfer molding. The pultrusion process is then considered, before the book concludes with an investigation into autoclave and out-of-autoclave curing processes in polymer matrix composites. With its distinguished editors and international team of expert contributors, Manufacturing techniques for polymer matrix composites (PMCs) is an essential guide for engineers and scientists working in the field of polymer matrix composites. Provides an authoritative review of the different technologies employed in the manufacture of polymer matrix composites Reviews the manufacturing of short fiber and nanoparticle-based polymer matrix composites, with injection and compression molding examined in depth Examines thermoplastic processing, sheet forming, fabric thermostamping, filament winding and continuous fiber reinforced profiles
Book Synopsis Computational Modeling of the Vacuum Assisted Resin Transfer Molding (VARTM) Process by : Krishna Mohan Chittajallu
Download or read book Computational Modeling of the Vacuum Assisted Resin Transfer Molding (VARTM) Process written by Krishna Mohan Chittajallu and published by . This book was released on 2004 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fundamentals of Engineering Numerical Analysis by : Parviz Moin
Download or read book Fundamentals of Engineering Numerical Analysis written by Parviz Moin and published by Cambridge University Press. This book was released on 2010-08-23 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the original publication of this book, available computer power has increased greatly. Today, scientific computing is playing an ever more prominent role as a tool in scientific discovery and engineering analysis. In this second edition, the key addition is an introduction to the finite element method. This is a widely used technique for solving partial differential equations (PDEs) in complex domains. This text introduces numerical methods and shows how to develop, analyse, and use them. Complete MATLAB programs for all the worked examples are now available at www.cambridge.org/Moin, and more than 30 exercises have been added. This thorough and practical book is intended as a first course in numerical analysis, primarily for new graduate students in engineering and physical science. Along with mastering the fundamentals of numerical methods, students will learn to write their own computer programs using standard numerical methods.
Book Synopsis Effects of Processing Conditions on Vacuum Assisted Resin Transfer Molding Process (VARTM) by : Elias J. Rigas
Download or read book Effects of Processing Conditions on Vacuum Assisted Resin Transfer Molding Process (VARTM) written by Elias J. Rigas and published by . This book was released on 2001 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Health Monitoring For Advanced Composite Structures by : M H Ferri Aliabadi
Download or read book Structural Health Monitoring For Advanced Composite Structures written by M H Ferri Aliabadi and published by World Scientific. This book was released on 2017-12-18 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural health monitoring (SHM) is a relatively new and alternative way of non-destructive inspection (NDI). It is the process of implementing a damage detection and characterization strategy for composite structures. The basis of SHM is the application of permanent fixed sensors on a structure, combined with minimum manual intervention to monitor its structural integrity. These sensors detect changes to the material and/or geometric properties of a structural system, including changes to the boundary conditions and system connectivity, which adversely affect the system's performance.This book's primary focus is on the diagnostics element of SHM, namely damage detection in composite structures. The techniques covered include the use of Piezoelectric transducers for active and passive Ultrasonics guided waves and electromechanical impedance measurements, and fiber optic sensors for strain sensing. It also includes numerical modeling of wave propagation in composite structures. Contributed chapters written by leading researchers in the field describe each of these techniques, making it a key text for researchers and NDI practitioners as well as postgraduate students in a number of specialties including materials, aerospace, mechanical and computational engineering.
Book Synopsis Modeling and Simulation of Vacuum Assisted Resin Transfer Molding for the Fabrication of Composite Materials by : Emmanuel Kwaku Darko
Download or read book Modeling and Simulation of Vacuum Assisted Resin Transfer Molding for the Fabrication of Composite Materials written by Emmanuel Kwaku Darko and published by . This book was released on 2003 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies the application of the liquid injection molding simulations (LIMS) on the resin flow process in vacuum assisted resin transfer molding (VARTM) of flat panels under various operating and process conditions. Also examines LIMS performance in predicting the infiltration time and flow front pressure using experimental flat panel infiltration data. Analyzes flow front times, effect of grid size, permeability ratios of fibers, and viscosity of resin on resin arrival times.
Book Synopsis Modeling, Design and Control of Vacuum Assisted Resin Transfer Molding (VARTM) for Thickness Variation Reduction by : Jing Li
Download or read book Modeling, Design and Control of Vacuum Assisted Resin Transfer Molding (VARTM) for Thickness Variation Reduction written by Jing Li and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Simulation on Filling Pattern of Vacuum Assisted Resin Transfer Molding (VARTM) for Sectional Wind Blade Shells by : Kee Hong Saw
Download or read book Simulation on Filling Pattern of Vacuum Assisted Resin Transfer Molding (VARTM) for Sectional Wind Blade Shells written by Kee Hong Saw and published by . This book was released on 2012 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Vacuum Assisted Resin Transfer Molding (VARTM) process is one of the most common and economical processes which has been adapted by many wind blade manufacturers. The significant advantages for this process primarily owed to its simplicity as well as its lower cost of operation. Nevertheless, there are several potential drawbacks from this process such as the delamination and the dryspot issues. The dryspot issue will be the main focus in this thesis. In this thesis, the methodology includes 3-D solid modeling, finite element modeling and injection simulations. Throughout the framework of this thesis, 3-D non-isothermal conditions would be implemented and double core framework will be incorporated within the sectional blade shells. The standard design of the blade is directly adapted from the Wind PACT Blade Designs. [1] The modeling work involves the use of CATIA V5 CAD modeling software to create a single full half wind blade shell which later sectioned to two sections. The sectional wind blade shells were equally divided right at the mid-span of the full blade namely, the root section and the tip section of the wind blade shells. Finite element modeling was also incorporated through the use of PATRAN 2008 r2 while the injection simulation is directly simulated through ESI Group of PAM RTM software. The results from the simulation were discussed and analyzed. Post analysis involves recommended solutions toward the issues found throughout the manufacturing process. Future works were also discussed in the final conclusions to provide potential future development study in the VARTM process.
Book Synopsis Modeling the Vacuum Assisted Resin Transfer Molding (VARTM) Process for Fabrication of Fiber/metal Hybrid Laminates by : Goker Tuncol
Download or read book Modeling the Vacuum Assisted Resin Transfer Molding (VARTM) Process for Fabrication of Fiber/metal Hybrid Laminates written by Goker Tuncol and published by . This book was released on 2010 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Vacuum Assisted Resin Transfer Molding of Sandwich Structures by : Steven A. Smith
Download or read book Vacuum Assisted Resin Transfer Molding of Sandwich Structures written by Steven A. Smith and published by . This book was released on 2001 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: Develops an automated vacuum assisted resin transfer molding (VARTM) process for manufacturing laminates, composite panels, and composite sandwich materials with close-cell cores. Obtains a robust single step process for manufacturing sandwich panels which should be capable of being automated and require little, if any, operator intervention. Performs mechanical tests and develops new test methods and methods of analysis to validate the quality of the sandwich structures produced.
Book Synopsis Composite Materials by : Kamal K. Kar
Download or read book Composite Materials written by Kamal K. Kar and published by Springer. This book was released on 2016-10-14 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite materials are used as substitutions of metals/traditional materials in aerospace, automotive, civil, mechanical and other industries. The present book collects the current knowledge and recent developments in the characterization and application of composite materials. To this purpose the volume describes the outstanding properties of this class of advanced material which recommend it for various industrial applications.
Book Synopsis Manufacturing of High Performance Composites Using Vacuum Assisted Resin Transfer Molding by : V. G. K. Menta
Download or read book Manufacturing of High Performance Composites Using Vacuum Assisted Resin Transfer Molding written by V. G. K. Menta and published by . This book was released on 2007 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The objective of this research is to establish and enhance the existing Vacuum Assisted Resin Transfer Molding (VARTM) process to manufacture high performance composite parts usable in the aerospace industry. Flat, hat, pi and multi stiffened panels have been manufactured by the VARTM process using AS4-5HS and AS4-8HS carbon fabric, and SI-ZG-5A low viscosity epoxy resin. Silicone-based reusable molds have been designed and developed to manufacture stiffened panels. Dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC) experiments of the SI-ZG-5A resin system were conducted to determine the storage modulus, loss modulus, and the glass transition temperature. The density and fiber volume fraction of manufactured graphite/epoxy panels have been determined. A three dimensional mathematical model has been developed for flow simulation, and is implemented in the ABAQUS finite element package code. It is used to predict the resin flow front during the infusion process and to optimize the flow parameters. The flow simulation model was validated with experimental findings available in literature. Tensile tests on coupons were performed to determine the elastic constants required for finite element structural analysis. Hat-stiffened panels have been tested under transverse loading and the results were validated by the finite element simulation. A flow monitoring, experimental setup is being developed at UMR. Resin infusion of a flat plate was monitored experimentally using both the video camera and infrared camera"--Abstract, leaf iii.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721093786 Total Pages :176 pages Book Rating :4.0/5 (937 download)
Book Synopsis RFI and Scrimp Model Development and Verification by : National Aeronautics and Space Administration (NASA)
Download or read book RFI and Scrimp Model Development and Verification written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-13 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vacuum-Assisted Resin Transfer Molding (VARTM) processes are becoming promising 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 simulation model of the VARTM process would provide a cost-effective tool in the manufacturing of composites utilizing this technique. Therefore, the objective of this research was to modify an existing three-dimensional, Resin Film Infusion (RFI)/Resin Transfer Molding (RTM) model to include VARTM simulation capabilities and to verify this model with the fabrication of aircraft structural composites. An additional objective was to use the VARTM model as a process analysis tool, where this tool would enable the user to configure the best process for manufacturing quality composites. Experimental verification of the model was performed by processing several flat composite panels. The parameters verified included flow front patterns and infiltration times. The flow front patterns were determined to be qualitatively accurate, while the simulated infiltration times over predicted experimental times by 8 to 10%. Capillary and gravitational forces were incorporated into the existing RFI/RTM model in order to simulate VARTM processing physics more accurately. The theoretical capillary pressure showed the capability to reduce the simulated infiltration times by as great as 6%. The gravity, on the other hand, was found to be negligible for all cases. Finally, the VARTM model was used as a process analysis tool. This enabled the user to determine such important process constraints as the location and type of injection ports and the permeability and location of the high-permeable media. A process for a three-stiffener composite panel was proposed. This configuration evolved from the variation of the process constrain
