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Studying and Reviewing the Modification, Completion or Change of the Classical Theories Used in the Simulation of Resin Injection Network for Manufacturing of a Large Composite Structure by Means of Vacuum Infusion Process

Keramati Tavallaei, Hossein | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55288 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Abedian, Ali
  7. Abstract:
  8. In recent years, liquid resin injection processes for aviation applications have been considered an alternative to conventional autoclave-based processes. At present, these processes have challenges that have been denied industry trust due to their inability to be objectively reproducible. In the last decade, some software has been developed to simulate the vacuum injection process, but this software does not have enough capability to predict the injection network, and an operator with sufficient empirical knowledge must use this software. In recent years, researchers have used this softwares to simulate the process, but so far no software has been developed that can offer injection networking or, if produced, is the technical knowledge of private companies. In this research, a trial and error method is used to establish a link between existing theories and software so that the software can predict the location of resin inputs with a simple model without the presence of an experienced operator. Numerical simulation of the resin injection process involves modeling the resin flow within the fibers and the resin cross-linking reaction. The time required to fill the part before the resin is gelled is calculated from the simulation results and an idea is provided to predict the location of the resin inlets. Finally, an optimal resin injection network will be provided for the selected boat mold. This study shows that EC157 epoxy resin can be transferred to the mold and filled without bubbles before gelling without any process problems such as dry spots.
  9. Keywords:
  10. Vacuum Infusion Process (VIP) ; Polymer Composites ; Resin Injection Optimization ; Resin Flow Simulation

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