Maximum permissible glass content

Discussion in 'Class Societies' started by Deep6lue, Sep 10, 2019.

  1. fallguy
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    fallguy Senior Member

    By the way, the article has a technical error I believe. The second paragraph suggests stitched biaxial hand laid rates of 48%, but no hand laid meets that number. Just pointing out a verbage issue. The chart looks accurate on a gutcheck.
     
  2. rxcomposite
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    rxcomposite Senior Member

    And here is for theoretical and real world. Schofield003a.jpg
    It is possible. Stitching is made so that it can be handled in the shop floor. It adds bulkiness. You can see the progression from stitched biax to Uni to prepreg as it progressively have higher fiber content. Stitching causes disruption of otherwise well aligned fibers known as fiber directionality factor.
     
  3. Eric ruttan
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    Eric ruttan Senior Member

    Papers from 10 years ago, linked on wikipedia, show volume ratios of 70. I have been told things have progressed alot in the last 10 years for infusion.

    But hey, what do I know?

    When does your source date from?
     
  4. rxcomposite
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    rxcomposite Senior Member

    Composite Fabrication Magazine.
     
  5. Eric ruttan
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    Eric ruttan Senior Member

    If I ask for the name of the source, will you answer with the date of the article?
     
  6. rxcomposite
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    rxcomposite Senior Member

    What is wrong with you? I already mentioned the author. The page showed the source, you again asked for the source. Next time you will ask me to vouch for the author. Nitpicking. I don't have time for you.
     
  7. fallguy
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    fallguy Senior Member

    Now you are working to self defeat.

    If you have real world f/v of 70% in commonly used, real world setting; it should be you linking industry info instead of challenging real efforts by forum members.
     
  8. Eric ruttan
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    Eric ruttan Senior Member

    The one thing I did ask for you didn't state.

    You stated things I didn't ask for in response to asking for the age of the source.

    So I wondered aloud if I asked for the thing you already told me if you would answer the thing I asked for.

    Why are you making this personal?
     
  9. Eric ruttan
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    Eric ruttan Senior Member

    I note you didn't answer the date issue.

    Wikipedia has the papers in its sources?

    Do you want the link?

    Fiber volume ratio - Wikipedia https://en.m.wikipedia.org/wiki/Fiber_volume_ratio
     
  10. fallguy
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    fallguy Senior Member

    The f/v citation on wiki is not even a commonly used fabric. In fact, it says 70 percent is an upper limit for commercial solutions.

    The sheet linked by RX showed commonly used industry items and methods and like I said, the best was 58.4% using pressure.

    I would be very surprised if windmills are getting 70% f/v. Got a link?
     
  11. Eric ruttan
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    Eric ruttan Senior Member

    Nothing that google wont find easy.
     
  12. fallguy
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    fallguy Senior Member

    Your claims are yours
     
  13. gonzo
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    gonzo Senior Member

    I think that volume ratio of fibers/resin are the proper way of measuring. The weight ratios do not allow precise comparison between resin of different densities.
     
  14. Eric ruttan
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    Eric ruttan Senior Member

    Of course. A 20 year old mag has 20 yo data, which is less than 10 year old data in the wiki article.

    Here is a 6 year old article which notes the 70% fv
    The evolution of infusion https://www.compositesworld.com/articles/the-evolution-of-infusion

    State of the art, now, afaik, is super low viscosity(<10 cps) and double bagging. But thats just from my reading and chats.

    But, hey, I may be all wrong and your 40% is super high tech.
     

  15. Eric ruttan
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    Eric ruttan Senior Member

    You didnt answer my question? Do you plan to?

    Why are you talking about weight?
     
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