1. Project 2: Biocomposite Sailing Dinghy Miho May Imaizumi Thomas O’Neill Ryan Garrahy

2. Project Plan May  Design Overview  Critical Load Cases  Composite Structural Design Thomas  Manufacturing Process  Procurement Plan  Budget Ryan  Project Schedule  Communication & Document Plan  Risks/Opportunity  Further testing

3. Design Overview

5. Critical Load Cases Load Cases Individual Load Conditions Impact Forces Collision with other dinghy during racing Collision with submerged object (rocks etc.) Collision with beacon post Beaching Manufacturing IssuesRemoval from mould Operational Loads Accidental gybe Self-weight

6. Materials  Fibre Selection  Good mechanical properties and durability in fluids  High thermal degradation temperatures  Compatibility with PA11 SisalFlax Hemp

7. Property & Compatibility Assessment  Experimental critical fibre volume fraction (V f ) of natural fibre/thermoplastic composites  Halphin-Tsai Model

8. Property & Compatibility Assessment E 1 (GPa)E 2 (GPa)G 12 (Gpa)ν 12 ν 23 Hm/PA113.92932.61180.72240.34360.3374 Fl/PA113.08042.16670.71120.90840.6797 Ss/PA1110.19893.67051.30600.38810.3874  Halphin-Tsai Results  Compatibility Treatment  CTDIC (Cardnol Derivative of Toluene Diisolyanate)  Reduces hydrophilic nature of Sisal fibres  Experimentally proven to improve bonding with thermoplastic matrix

9. Composite Design Structure  Weave sisal fabric reinforcement  Weave architectures: Plain-weave Twill-weaveMatt-weave

10. Composite Design Structure  6 PA11/Ss laminate skins  25mm Balsa wood core sandwich structure 3 Ss/PA11 laminates Balsa wood core

11. Composite Tests  Ss/PA11 – New material!  Unknown strengths  Elastic moduli alone are not enough information to decide dimensions of the structure  Safety factor (e.g. Tsai-Hill equations)  ASTM composite tests ©Team E4

12. Procurement

13. Budget

14. Project Schedule

15. Stage 1. Design Review Stage 2. Procurement Stage 3. Prototype Testing Stage 4. Manufacturing and Assembly Stage 5. Handover

16. Project Schedule

17. Communication and Document Management

21. Risks

23. Opportunities

24. Testing

28. Thanks for Listening MECH3600 Team M2 Giving form and function to dreams