Thesis
Resin transfer molding (RTM) of wood strands reinforced composite panels
Washington State University
Master of Science (MS), Washington State University
2014
Handle:
https://hdl.handle.net/2376/102837
Abstract
Resin transfer molding (RTM) and vacuum assisted resin transfer molding (VARTM) are widely applied in manufacturing airplane and automobile interior composite products due to their cost-effectiveness. In implementing this manufacturing technology, resin impregnation is critical to the quality of composite products. Since permeability of wood strands preform (the fiber reinforcement) affects the resin impregnation, resin flow and permeability behavior should be understood to produce quality products with consistent performance. This study focused on determining suitable processing variables for preform fabrication and characterizing resin flow and physical and mechanical performance of composite panels. Cold setting adhesive (PVAc) applied to discontinuous elements, wood strands, solely for the purpose of pre-pressing a preform to maintain its form and integrity. Design of experiments (DOE) was utilized to statistically analyze the influence of processing variables, PVAc content and preform target density. A linear model was developed using response surface method (RSM) for the determination of ideal processing parameters in resin transfer. Preform permeability was calculated based on Darcy's law using three different approaches. Results indicated increasing trends in permeability estimation with increased injection pressure and decreased vacuum. Surface finish showed a direct relationship with increased vacuum. Composite panel flexural behavior was directly proportional to preform density. vi Benchmark property values for RTM manufactured wood strand composite panels were established, that has not been done before. Panels exhibited excellent mechanical properties and moisture resistance (an indirect measure of dimensional stability); among the three resins evaluated, vinyl ester yielded better flexural, tensile, internal bond, moisture sorption properties.
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Details
- Title
- Resin transfer molding (RTM) of wood strands reinforced composite panels
- Creators
- Wenrui Yang
- Contributors
- Vikram Yadama (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Mechanical and Materials Engineering, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525075701842
- Language
- English
- Resource Type
- Thesis