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Impact damage in fatigue loaded composite structures

 
: Gerharz, J.J.; Huth, H.; Idelberger, H.

Engineering Materials Advisory Services Ltd. -EMAS-, Cradley Heath:
Aeronautical Fatigue in the Electronic Era
Cradley Heath, 1989
pp.497-516 : Abb.,Tab.,Lit.
International Committee on Aeronautical Fatigue (Symposium) <15, 1989, Jerusalem>
English
Conference Paper
Fraunhofer LBF ()
aircraft industry; Bauteil; composite material; damage analysis; Einzelflugversuch; fatigue life estimation; flight by fight test; Flugzeugbau; impact loading; Lebensdauerabschätzung; metallischer Werkstoff; nonmetallic material; Rechenverfahren; Schadensanalyse; stiffener; Stoßbeanspruchung; Stringer; structural component; theoretical method; Verbundwerkstoff; Versteifung

Abstract
Nonvisible impact damage at critical locations reduces static and residual compressive strength of a cocured composite skin-stringer structure. Fatigue loading of impacted skin specimens in compression first increases the number of delaminations before secondly driving some of them out of the original impact damaged area. The observed phenomena are utilized to develop a method for analytical prediction of compressive strength of composite structure after impact, and after impact and fatigue.

: http://publica.fraunhofer.de/documents/PX-17867.html