how to increase the toughness of Fiberglass?

Discussion in 'Fiberglass and Composite Boat Building' started by yaasaay, Jun 8, 2011.

  1. yaasaay
    Joined: May 2011
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    yaasaay Junior Member

    hi guys


    is there way to increase the toughness of fiberglass and make it stronger


    and
    can you tell me the ratio between resin and filler ?
     
  2. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    Toughness is not really a technical term. What exactly do you want to increase? There are several types of fiberglass and resins that can be used. All of them have different characteristics. Laminates are designed for specific uses. For example, what can be considered tough for abrasion resistance may be too brittle and stiff for a fishing rod.
     
  3. yaasaay
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    yaasaay Junior Member

    I want to use fiberglass for the hull of the boat and I want the hull to be strong


    Is a normal method to make fiberglass good and tough enough for the hull?

    I know how to make fiberglass but I am not sure
    if the steps not correct please correct it
    first I layed the fiberglass in the Hull of boat
    then I paint it by epoxy
    after that I mixed the resin and filler together and put it in the hull

    Is it correct?
     
  4. TeddyDiver
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    TeddyDiver Gollywobbler

    Some more specific please.. Are you repairing a boat, inside or outside? Or perhaps building a new one?
     
  5. PAR
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    PAR Yacht Designer/Builder

    Yaasaay, you're kidding right? Do yourself a big favor and buy some boat construction books, in the medium you desire ('glass). Once you get a handle on the terms, methods, techniques and practices, you can come back with some specific questions about issues you have. Currently you're asking for a reference volume of 'glass boat building methodology, which is way out of the scope of this format.
     
  6. yaasaay
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    yaasaay Junior Member

    TeddyDiver
    for a new one
    PAR
    I'm really serious

    I have some books from the internet but not good to that because in my region you can't find books talk about boat and I am begginer in this things
    May be you will laugh but the try is better than not to try


    I have some question can you answer me

    1- After I finish the structure of the boat what should I do?

    2- Is covered the hull by fiberglass enough to resist water?

    3- I finished the structure but the structure not strong to that So do you think if I cover the hull and the other parts of the boat it will be enough to make it strong and durable

    4- the structure has some holes so is the holes will solved by fiberglass or not?

    I will wait your response

    regards
     
  7. TeddyDiver
    Joined: Dec 2007
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    TeddyDiver Gollywobbler

    Blue text is my responses..
    BR Teddy
     
  8. yaasaay
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    yaasaay Junior Member

    I work on this http://ifile.it/ck9h5bz
    the detail in the file

    please if is there some thing wrong in the steps in the file tell me
     
  9. PAR
    Joined: Nov 2003
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    PAR Yacht Designer/Builder

    You have to understand material properties, engineering and yacht design to accomplish what you are attempting. You clearly don't have a solid grasp on any of these subjects, so the only advise anyone should be offering is the various texts and courses available to cover the subjects involved.
     
  10. Ad Hoc
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    Ad Hoc Naval Architect

    Do you fully understand what toughness for a material means?
     
  11. tunnels

    tunnels Previous Member

    YOU NEED TO TELL US WHAT YOU ARE REFERING TO IN THE WAY OF TOUGHNESS ?????

    Resin and filler BE A BIT MORE SPECIFIC !
    Using resin to make filler ????
    what are you filling ??
    Theres lots recipies for fillers depending on what its used for !!There not to many things you need to make all the differant fillers but need to know what its being used for !. :confused:
     
  12. yaasaay
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    yaasaay Junior Member

    PAR

    Ok from where can I understand material properties do you have sites for this
    and for the fiberglass do you have sites explain it with details

    -------------

    I am not sure but I mean By toughness whereby if we Standing
    in it, it will be strong and not easy to break
    if I Misunderstood please correct me


    --------------





    thanks for any replies


     
  13. Ad Hoc
    Joined: Oct 2008
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    Ad Hoc Naval Architect

    The toughness of a material is defined as the ability of a smooth, unnotched member to absorb energy. Notch toughness, is defined as the ability of a material to absorb energy in the presence of a flaw.
     
  14. tunnels

    tunnels Previous Member

    How tough is tough
    One surf life saving inflatable with a ridged bottom the interior floor that the guys stood and sat on was one layer of 800 gram double bias glass with a 225 gram chopped stand matt against the gel coat . How did it get it strength ? First it was stuck around all sides ! second the floor was not flat but had a curve from one end to the other . thirdly the guys had bare feet all the time and needed a floor with a little bit of softness to it . spring !!even with a 1/2 of foam on top it was still quite hard to fall on . The boat were only 3.8 meters long but would some times have 5 adults inside sitting and standing on the floor . simply Just one layer of glass !!!!
    What do you know about twist and flex ?? They are not the same a panel can flex without twist . a hull can twist without flex !!! Get what i mean ??? this sort f goes hand in hand with toughness !!!.
    I say you need to know the capabilities of the materials you are working with !! The biggest boats i have seen made purely from chopped strand glass from a chopper gun were 36 feet long . had no woven or stitched materials at all in any part of the boat .
    The purely toughest hull i ever bult was simply 4 layers of 400 gram unidirectional glass with a 150gramm chopped strand matt between eac layer . . The secret is in the oriantation that the glass fibres were running at . Know you materials !!!!:D
     

  15. yaasaay
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    yaasaay Junior Member

    thanks tunnels

    really what didn't I know is the capacity of the material

    I understand from you the board with paint by these materials can have 3 or 5 adult even if it not thick to that

    and can you answer the picture its important for me please
     
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