FEATURE ® g…/…Composite RTM Process2 “Process” Constant rate method - injection time - maximum pressure - minimum rate Constant pressure method - injection time - minimum rate The user chooses a simple rectangular shape with constant rate injection for the analysis: • 3D • 2D with undercut • 3D with undercut • Rotational part - Production: total number of parts per day (from 0 to 1,000+) - Surface finish • 1 side with gelcoat • 2 sides with gelcoat • 1 side with mould finish • 2 sides with mould finish Example of how to use the simulation module 3. Criteria for choosing the pr ocess: pr ocess choice module Once the structure’s preliminary design and simulation are completed, the user can access a module that proposes technology for processing the part as a function of the parameters entered: - Reinforcement volume % (10-65%) - Part surface (0 to 12 m2+) - Mould internal pressure (0 to 10 bar+) - Production: number of parts per day (0.2 to 10+) - Thickness tolerance (from +/- 0.05 to +/- 0.5) - Part structure (one-piece/sandwich/compound) - Shape complexity • 2D • 2.5D Example of how to use the process choice module 4. Technical cost analysis for the par t: par t cost module By filling in the different fields under each tab, the user can obtain a unit cost for the part, including what percentage each manufacturing step contributes to the cost: Labour Materials Tooling Equipment Post-processing steps Packaging JEC Composites Magazine / No39 March - April 2008