CHALMERS FORMULA SAILING BIO-BASED COMPOSITES IN SAILING? CHALMERS - PowerPoint PPT Presentation

CHALMERS FORMULA SAILING BIO-BASED COMPOSITES IN SAILING?

CHALMERS FORMULA SAILING 2019-03-14 Chalmers University of Technology 2

BACKGROUND – 1001VELACUP 2019-03-14 Chalmers University of Technology 3

BACKGROUND – WHY? 2019-03-14 Chalmers University of Technology 4

1001VELACUP - R3 CLASS Length < 4.6m Sail area < 33 m 2 BOX RULE Width < 2.1m Monohulls only MATERIALS 2019-03-14 Chalmers University of Technology 5

MATERIALS – HULL AND DECK Basalt FRP CFRP Aramid FRP 2019-03-14 Chalmers University of Technology 6

MATERIALS – HULL AND DECK Min. 70% of vegetable or animal origin Min. 75% of recyclable materials 2019-03-14 Chalmers University of Technology 7

MATERIALS OPTIONS Bio-based Wood FRP ? Recyclable Aluminium FRP 2019-03-14 Chalmers University of Technology 8

WHAT REINFORCEMENT? Cantero et.al (2003) 2019-03-14 Chalmers University of Technology 9

WHAT CORE MATERIAL? HONEYCOMB (AL) POLYMER FOAM WOOD + High performance + Well proven + Well proven +Well proven + Easy to build + Bio-based + Recyclable - Not bio/recyclable + Easy to build - Difficult to build - Moisture sensitive CORK BIO-POLY FOAM HONEYCOMB (PLA) + Easy to build + Easy to build + Bio-based + Bio-based + Bio-based + (High) performance -Easily available - Unproven - Difficult to build - Unproven 2019-03-14 Chalmers University of Technology 10

WHAT MATRIX? TRADITIONAL EPOXY THERMOPLASTIC (PLA?) + Easily available + Recyclable + Easy process - Not used for boats +Mechanical properties - Complicated process BIO-EPOXY (50%) - Not bio-based/recyclable + Available + Bio-based - More difficult process ARKEMA ELIUM OTHER THERMOSET + Recyclable + Easily available + Mechanical properties + Easy processing - Sensitive process - Not bio-based nor recyclable 2019-03-14 Chalmers University of Technology 11

THE BUILD PROCESS • Flax fiber reinforcement • Balsa wood core • Cashew nutshell epoxy (45% bio) • Built with ” strip-planking ” on CNC cut templates • Vacuum bagged 2019-03-14 Chalmers University of Technology 12

CHALLENGES • Fiber properties vary naturally • Complex structural layout necessary for performance • The epoxy has high viscosity and cures fast • Fibers are hollow (lumen) • Sensitive to moisture Lumen 2019-03-14 Chalmers University of Technology 13

THE DESIGN PROCESS Material Rule selection compliance Structural design 2019-03-14 Chalmers University of Technology 14

THE DESIGN PROCESS Hull shape (hydrodynamics) Weather Material Rule conditions selection compliance Performance Crew Deck layout Centerboard & (VPP) requirements (sail handling) rudder design Competitor Sail plan Mast and rig analysis configuration engineering Structural design 2019-03-14 Chalmers University of Technology 15

THE RESULT 2019-03-14 Chalmers University of Technology 17

THE RESULT 2019-03-14 Chalmers University of Technology 18

THE RESULT 2019-03-14 Chalmers University of Technology 19

2019-03-14 Chalmers University of Technology 20

Apply at: goo.gl/bBiSSr Or contact us: adam.persson@sspa.se lars.larsson@chalmers.se 2019-03-14 Chalmers University of Technology 23