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Correlation between interlaminar crack growth properties and damage tolerance behavior of composite structures

Beziehung zwischen Bruchzähigkeitseigenschaften und Schadenstoleranz bei Bauteilen aus faserverstärktem Kunststoff
 
: Lang, R.W.; Gerharz, J.J.; Cvitkovich, M.; Lavia, A.; Heym, M.

Lang, R.W.; Erath, M.A. ; Society for the Advancement of Material and Process Engineering -SAMPE-, European Chapter:
High Tech in Salzburg. Creativity in Advanced Materials and Process Engineering
Niederglatt: SAMPE European Chapter, 1995 (Proceedings of the International SAMPE Europe Conference of the Society for the Advancement of Material and Process Engineering 16)
ISBN: 3-9520477-2-4
pp.235-246 : Ill., Lit.
International SAMPE Europe Conference <16, 1995, Salzburg>
English
Conference Paper
Fraunhofer LBF ()
Bruchmechanik; composite material; crack growth behavior; damage tolerant structure; fracture mechanic; interlaminar stress; interlaminare Spannung; material property; Probenart; Rißfortschrittsverhalten; schadenstolerante Konstruktion; specimen test; Verbundwerkstoff; Werkstoffeigenschaft

Abstract
The main purpose of this paper is to describe an empirical correlation between interlaminar fracture properties of coupon specimens and the damage tolerance behavior of higher order specimens (laminate specimens, detail specimens and subcomponents) for advanced polymer matrix composites. Four prepreg materials exhibiting a broad range of interlaminar fracture toughness were selected and characterized at different specimen levels as to their delamination growth behavior under various monotonic and fatigue loading conditions (mode I, mode II and mixed mode I/II). When comparing the mixed mode failure criteria established at the coupon level, an excellent correlation could be achieved with the experimental results obtained for higher level specimens in terms of material ranking.

: http://publica.fraunhofer.de/documents/PX-8719.html