Building a canoe: S2-glass vs kevlar vs carbon

Discussion in 'Fiberglass and Composite Boat Building' started by ahender, Nov 1, 2019.

  1. ondarvr
    Joined: Dec 2005
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    Location: Monroe WA

    ondarvr Senior Member

    Mixing fibers doesn’t typically help in this type of build. Sometimes Kevlar is used for its abrasion or puncture resistance, but that’s about the only benefit it will add when used with other fibers.

    If you mix fiber types the fiber with the least elongation takes the entire load until it fails, the other fibers are just along for the ride up to that point. The next fiber is now required to handle the entire load itself, and typically fails right away.

    So with multiple fibers you can easily end up with a much heavier, but ultimately weaker laminate.
     
    fallguy likes this.
  2. ahender
    Joined: Jan 2009
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    Location: Athens, GA USA

    ahender Junior Member

    Thank you Ondarvr. This is great information.
     
  3. BlueBell
    Joined: May 2017
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    BlueBell Ahhhhh...

    Skin on Frame (SOF) is very lightweight and durable.
     
  4. ahender
    Joined: Jan 2009
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    ahender Junior Member

    Thanks for your comment BlueBell.
     
  5. fallguy
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    fallguy Senior Member

    excellent post
     
  6. BlueBell
    Joined: May 2017
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    Location: Victoria BC Canada

    BlueBell Ahhhhh...

    I agree, stick with one material, epoxy-fiber and lay-up as per design needs/loads.
    Or vinylester, but you just can't beat all the positive characteristics of epoxy in my opinion.
     

  7. ahender
    Joined: Jan 2009
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    Location: Athens, GA USA

    ahender Junior Member

    Thanks again for your feedback.
     
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