Roving VS non-woven Biax

Discussion in 'Fiberglass and Composite Boat Building' started by Roy Berntsen, Aug 17, 2016.

  1. Roy Berntsen
    Joined: Jan 2011
    Posts: 30
    Likes: 1, Points: 0, Legacy Rep: 36
    Location: Oslo

    Roy Berntsen Roy Berntsen Design

    I wonder if there is a conversion rate to get from a roving to multiaxial stiched-biax in terms of weight or thickness.

    I have calculated scantlings for roving but want to use AMT. AMT should give similar properties with less weight/thickness

    Thanks for any help on this.
     
  2. messabout
    Joined: Jan 2006
    Posts: 3,367
    Likes: 510, Points: 113, Legacy Rep: 1279
    Location: Lakeland Fl USA

    messabout Senior Member

    Doctorx, I suspect that thickness will be a major stiffness determinant without serious regard to the material in the space between the most remote fibers.
     
  3. Roy Berntsen
    Joined: Jan 2011
    Posts: 30
    Likes: 1, Points: 0, Legacy Rep: 36
    Location: Oslo

    Roy Berntsen Roy Berntsen Design

    Well this is a sandwich configuration, so not so much. I was thinking non-woven had better mechanical properties than woven roving, but if they both are made of e-glass they would probably be similar in tensile/compression/stretch properties... How ever in a laminate non-woven would perform better due to no over under weave structure?

    But I guess I can compare:
    Roving, 814g/m2 = 1,05 mm
    biax 0/90, 816g/m2 = 1,06 mm

    Roving 610g/m2 = 0,79 mm
    biax 0/90 612g/m2 = 0,79

    This tells us that roving and amt fibers has the same thickness for same weight. This meens we have to look at the mechanical properties to see what can be obtained with non-woven vs roving.

    I need to get some datasheets and see. Anyways the polyester will probably be the weakest point in the sandwich so maybe this is just a waist of time...?
     

  4. Mr Efficiency
    Joined: Oct 2010
    Posts: 10,386
    Likes: 1,042, Points: 113, Legacy Rep: 702
    Location: Australia

    Mr Efficiency Senior Member

    Woven is much cheaper, a shame to use with an expensive core though. Fibres are not straight, so loses strength that way. More suited to single skin glass.
     
Loading...
Similar Threads
  1. fallguy
    Replies:
    0
    Views:
    712
  2. Camino Camper
    Replies:
    13
    Views:
    1,673
  3. metalsailer
    Replies:
    20
    Views:
    2,100
  4. wamosjk
    Replies:
    6
    Views:
    4,827
  5. afteryou
    Replies:
    17
    Views:
    3,425
  6. apson
    Replies:
    3
    Views:
    5,180
  7. DougDA
    Replies:
    16
    Views:
    1,195
  8. John Rivers
    Replies:
    42
    Views:
    2,814
  9. Tkarrde
    Replies:
    3
    Views:
    1,123
  10. Midday Gun
    Replies:
    12
    Views:
    10,204
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.