Fracture Performance of Random, Continuous Glass Strand Reinforced Polyamide-RIM Composite

  • J. Karger-Kocsis
  • K. Friedrich

Abstract

The fracture behavior of reaction injection molded (RIM) polyamide block copolymer reinforced with randomly arranged continuous glass fiber bundles (glass mats) was studied under monotonic static and dynamic loading conditions. Static fracture measurements carried out with compact tension specimens at different crosshead speeds (1 and 1000 mm/min) and temperatures (-40 to 80°C). Fracture toughness values were determined from maximum loads. Dynamic fracture toughness and fracture energy values were derived from high-speed impact bending tests carried out on different Charpy and Izod specimens, respectively. The fracture mechanical data were compared with each other and with those of conventional short fiber reinforced polyamides. Failure mode of the composites was characterized by fractography and possible failure events were summarized. Recommendations were given for further material improvements.

Keywords

Fracture Toughness Crosshead Speed Strain Energy Release Compact Tension Specimen Dynamic Fracture Toughness 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Karger-Kocsis, J and Friedrich, K.:Plast.Rubb.Process. Appl., 8 (1987), 91–104Google Scholar
  2. 2.
    Idem:Compos.Sci.Technol., 32 (1988), 293–325CrossRefGoogle Scholar
  3. 3.
    Williams, J.G.:Fracture Mechanics of Polymers, Ellis Horwood Ltd, Chichester, 1984Google Scholar
  4. 4.
    Savadori, A.:Polym.Test., 5 (1985), 209–241CrossRefGoogle Scholar
  5. 5.
    Plati, E. and Wiliams, J.G.:Polym.Eng.Sci., 15 (1975), 470–477CrossRefGoogle Scholar
  6. 6.
    Friedrich, K. and Karger-Kocsis, J.:Fractography and failure mechanisms of unfilled and short fibre reinforced semicrystalline thermoplastics, Ch.11 in “Fractography and Failure Mechanisms of Polymers and Composites” Ed.:Roulin-Moloney, A.C.), Elsevier Appl.Sci., Barking, 1989, pp. 437–494Google Scholar
  7. 7.
    Karger-Kocsis, J.: Fracture of short-fibre reinforced thermoplastics, Ch.6 in “Applicaton of Fracture Mechanics to Composite Materials” (Ed.:Friedrich, K.), Elsevier, Amsterdam, 1989, pp.189–247Google Scholar
  8. 8.
    Idem: Structure and fracture mechanics of injection molded composites in “Encyclopedia of Composites” (Ed.:Lee, S.M.), VCH Publ., N.Y., (to be appeared)Google Scholar
  9. 9.
    Akay, M. and Barkley, D.:Polym. Test., 7 (1987), 391–404CrossRefGoogle Scholar
  10. 10.
    Friedrich, K:Fractographic analysis of polymer composites Ch.11 in “Application of Fracture Mechanics to Composite Materials” (Ed.:Friedrich, K.), Elsevier, Amsterdam, 1989, pp. 425–487Google Scholar
  11. 11.
    Otaigbe, J.U. and Harland, W.G.:J.Appl.Polym.Sci., 37 (1989) 77–89CrossRefGoogle Scholar
  12. 12.
    Friedrich, K. and Karger-Kocsis, J.:Fracture and fatigue of unfilled and reinforced polyamides and polyesters in “Solid State Behavior of Linear Polyesters and Polyamides” (Eds.:Schultz, J.M and Fakirov, S.), Prentice Hall, Englewood Cliff (to be appeared)Google Scholar

Copyright information

© Elsevier Science Publishers Ltd 1990

Authors and Affiliations

  • J. Karger-Kocsis
    • 1
  • K. Friedrich
    • 1
  1. 1.Technical University of Hamburg-HarburgHarburgWest-Germany

Personalised recommendations