Filament winding

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Filament winding

  1. 1. FILAMENT WINDING Neslihan Yağmur 11/12/2012 1
  2. 2. What is Filament Winding? □ Filament winding is the process of winding fiber material and resin around a shape, known as a mandrel, to create composite product. The process of filament winding is typically used to create circular composite products with a hollow core. 2
  3. 3. Filament Winding Process 3
  4. 4. Process  Precision high-speed positioning of continuous fiber in a pre-determined pattern is the basis of the filament winding process .  There is a mandrel that the fiber and resin wound upon, is cured in room temp or in oven. After cure mandrel is removed leaving a hallow composite structure. 4
  5. 5. Tension □ fibre tension is critical to the operation of a filament winding machine, □ tension required depends on □ type of fibre □ part diameter □ winding pattern 5
  6. 6. Tension □ fibre tension directly affects: □ fibre volume fraction, □ void content, □ strength and stiffness of the composite part. 6
  7. 7. Winding Patterns Circumferential: helical: polar: 7
  8. 8. Materials fiber (in roving form): □ E-glass, S-glass, □ Carbon / Graphite, □ Aramid, □ Borons. 8
  9. 9. Materials Resins: □ Epoxy, □ Vinyl ester, □ Polyester, □ Polyurethane, □ Phenolics, □ Furans, □ Polyimides. 9
  10. 10. Factors Affecting Properties □ Fabrication variables □ Processing variables □ Winding variables □ Material's variables □ Environmental variables 10
  11. 11. Advantages of Filament Winding □ highly reproducible nature of the process □ continuous fiber over the entire part □ high fiber volume is obtainable □ ability to orient fibers in the load direction (10° minimum winding angle) □ fiber and resin used in lowest cost form □ size of component not restricted by oven or autoclave size □ process automation (particularly with high volume) results in cost savings 11
  12. 12. Disadvantages of Filament Winding □ part configuration must facilitate mandrel extraction □ mandrel could be complex and expensive □ inability to wind reverse curvature □ inability to easily change fiber path within one layer □ wound external surface may not be satisfactory for some applications 12
  13. 13. Application □ Storage tank □ Railway tank car □ Pipe 13
  14. 14. Application □ Aerospace Parts □ Sporting Goods □ Gas Tanks 14
  15. 15. References □ Filament Winding Compositions for Fiber/Resin Composites, P. Klemarczyk, 1996 □ Thermoplastic Filament Winding, Composites Manufacturing, J. Romagna,1995 15

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