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Richmond A-5000 E-3760 Silicone bag In house Reinforced silicone Good elongation good return Good elongation good return Excellent elongation excellent return The Airtech KM1300 and the Richmond A-5000 were selected to be used in subsequent trials due to their good elongation and return to the surface of th part after infusion for Task 3. Criteria for selection included: flexibility, ability to reuse, toughness, and clarity. A number of different contoured sheet patterns were evaluated for the profile which produces the temporary distribution channels for the resin when vacuum is applied to the bagged system. Differentmaterialswithdifferentcontouringandvaryingdegreesofstiffnesswere evaluated. Criteriawaseaseofuseofthecontouredsheet,costofthesheetandreusability. After extensive investigation and testing we found that the simplest and easiest sheet pattern was one that could be made from wood strips and similarly shaped urethane strips. These strips allowed us to both control the height and separation between channels. This wood strip system works very well for the initial prototype. And can be molded in composite or cast as a urethane blanket for production. We have also discovered that many different types of commercially available deep grooved industrial floor mats work very well. These mats work very well for going around corners and slight compound curved areas. 2.2. Identify the Demonstration Parts to be Fabricated and Resins to be Used for Demonstrating the Capabilities of the LS VARTM Process for High Technology Navy Platforms. During the beginning portion of the project we were fortunate enough to have a concurrent project that provided the access to some aerospace parts for testing. Sunrez opted to use theseveryexpensiveandexoticcarbonfibermaterials. Therewere3differentpartstobe built which we felt would demonstrate very well the capabilities of the LS Process for the SBIR. Thesepartswereasfollows: 3 each - 32 square foot full thickness section of a wing panel. 130 lb carbon fiber Kevlar stitched fabric. 1 each - cored section full size of leading edge advanced shuttle wing. 1each-coredsectionscalesizeofshuttlewing. Thesepartsweretobebuiltwithcarbon fiber and epoxy and vinyl ester resin. -5-PDF Image | Affordable NDM Vacuum Assisted Resin Transfer Molding
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