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.
Results
Showing 1 to 20 of 44 for “"resin transfer molding"”.
-
An experimental and numerical investigation of resin transfer molding
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.
-
Modeling Preform Manufacture and Mold Filling for Resin Transfer Molding
These mathematical models for preform manufacture and mold filling should help engineers to design parts and tooling, optimize operating conditions, and shorten the time required to produce low-cost, high-quality net-shape RTM parts.
-
Vacuum Assisted Resin Transfer Molding (VARTM): Model Development and Verification
… investigation, a comprehensive Vacuum Assisted Resin Transfer Molding (VARTM) process simulation model was developed and verified. The model incorporates resin flow through the preform, compaction and relaxation of the preform, and viscosity and cure kinetics of the resin. The computer model can …
-
Verification of a three-dimensional resin transfer molding process simulation model
… finite element model simulating the resin flow and cure through an orthotropic fabric preform. The material characterizations completed include resin kinetics and viscosity models, as well as preform permeability and compaction models. The steady-state and advancing front permeability …
-
A cure process model for resin transfer molding of advanced composites
The resin transfer molding (RTM) process has been identified as a cost-effective fabrication technique for producing composite materials from geometrically complex reinforcements. Processing models can be used to determine the temperature and pressure cycles which will produce a finished part with …
-
Effect of vacuum level on the vacuum-assisted resin transfer molding process
Liquid composite molding (LCM) processes have become increasingly popular during the past five decades for the production of complex composite parts. Resin transfer molding (RTM) and structural reaction injection molding (SRIM) are the most widely used LCM processes. These two processes have the …
-
Visualization of the flow in complex shapes made by resin transfer molding
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1993.
-
Vacuum-Assisted Resin Transfer Molding (VARTM) Model Development, Verification, and Process Analysis
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 …
-
Verification of a two-dimensional infiltration model for the resin transfer molding process
… of a dry textile preform by an injected resin has been verified. The model, which is based on the finite element/control volume technique, determines the total infiltration time and the pressure increase at the mold inlet associated with the RTM process. Important input data for the model …
-
Characterization of the Vacuum Assisted Resin Transfer Molding Process for Fabrication of Aerospace Composites
… airframe structure. The Vacuum Assisted Resin Transfer Molding (VARTM) processing technique offers a safer, more affordable alternative to manufacture large scale composite fuselages and wing structures. Vacuum assisted resin transfer molding is an infusion process originally developed …
-
Vacuum Assisted Resin Transfer Molding of Foam Sandwich Composite Materials: Process Development and Model Verification
Vacuum assisted resin transfer molding (VARTM) is a low cost resin infusion process being developed for the manufacture of composite structures. VARTM is being evaluated for the manufacture of primary aircraft structures, including foam sandwich composite materials. One of the benefits of VARTM is …
-
Effect of various process variables on the mechanical properties of laminates produced through resin transfer molding process
The increasing interest in the Resin Transfer Molding Process (RTM) evolved from its potential for reducing manufacturing costs, while increasing the capability of manufacturing complex parts. This manufacturing process like many other processes involves a large number of variables, consisting of …
-
Development and verification of a resin film infusion/resin transfer molding simulation model for fabrication of advanced textile composites
… computer model for the simulation of the resin transfer molding/resin film infusion processing of advanced composite materials. This computer simulation model is designed to provide aircraft structure and tool designers with a method of predicting the infiltration and curing behavior of a …
-
Economics of composite material manufacturing equipment
… Tow Placement, Braiding, 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 …
-
Effects of Shallow Bi-Angle, Thin-Ply Laminates on the Structural Performance of Composite Wings
… using an out-of-autoclave vacuum assisted resin transfer molding process. By conducting static bending tests, we show superior structural performances of the wing structure that employs shallow bi-angle fibers and thin-ply fabric, compared to those that use conventional fiber-angle and …
-
Fibrous tectonics
… considering issues of scalability, traditional molding techniques demand significantly more labor, material, and with that, overarching costs. Inflatable molds however, require only more air. Coupled with the rethinking of molding techniques is a consideration in the technological methodologies …
-
Cost modeling and design for manufacturing guidelines for advanced composite fabrication
… production technologies such as Hand Layup, 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 …
-
Effects of fiber architecture and through-the-thickness stitching on permeability and compaction of textile preforms
… in composite structures. Processes such as Resin Transfer Molding and Resin Film Infusion Molding that are used to manufacture composite structures, depend heavily on the responses of these reinforcements for their success. Fabric systems have undergone rapid changes over the years and have …
-
Characterization and modeling of the effect of environmental degradation on flexural strength of carbon/epoxy composites
… for flexure tests using Vacuum Assisted Resin Transfer Molding (VARTM). A unique strain fixture was designed to apply constant strain on the specimens during ageing and applied a simple methodology to eliminate excessive creep in the specimens. A two-dimensional cohesive layer …
Page 1 of 3