Impact-Induced Delaminations in Thermoset and Thermoplastic Composites

  • D. K. Hsu
  • B. E. Lucht


Laminated fiber-reinforced composites are engineering materials with many desirable properties including high stiffness and strength. However, the lack of fiber reinforcement in the through-thickness direction makes composite laminates vulnerable to foreign object impact loading. Transverse impact loading can lead to a variety of damages including matrix cracking, delamination and fiber breakage. Delaminations can reduce the strength of a laminate, especially the compressive strength after impact. Impact loading typically causes multiple delaminations that vary in size and shape by depth location. The fracture behavior of impact damages has been a topic of extensive research [1]. Recently significant advances have been made in the area of nondestructive evaluation (NDE) of impact damages in composites. For example, ultrasound is used to map out the details of impact-induced delaminations with ply-by-ply resolution [2].


Composite Laminate Impact Resistance Damage Area Impact Damage Fiber Breakage 
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    M. Kitanaka, H. Kobayashi, T. Norita and Y. Kawatsu, “Damage tolerance of thermoplastic/graphite fiber composites”, ICCM ‘85, pp. 913–929.Google Scholar

Copyright information

© Springer Science+Business Media New York 1989

Authors and Affiliations

  • D. K. Hsu
    • 1
  • B. E. Lucht
    • 1
  1. 1.Center for NDEIowa State UniversityAmesIowaUSA

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