Hail impaction may cause multiple-site damage to sandwich panels used as a part of control surfaces and is therefore a major maintenance and repair concern for the airlines. A strength analysis of the damaged sandwich panels is essential to predict the influence of the multi-site damage, which is necessary for establishing allowable damage limits. The location of the damage sites in relation to each other and their size influence the stress field significantly. This study presents an analytical method to determine the stress distribution in sandwich panels with arbitrary located damage, that is elliptical or circular shape. The validity of this method is established by comparison against the three-dimensional finite element models of sandwich panels with multiple damage zones. The comparison proves that the present technique captures the stress concentration in inter-indentation zones with acceptable accuracy for distances between the indentations as small as 15.0 % of the indentation diameter.
Analysis of sandwich panels with multiple-site damage
Analyse von Sandwich-Verkleidungen mit örtlich verteilter Schädigung
Engineering Fracture Mechanics ; 64 , 2 ; 255-268
1999
14 Seiten, 9 Bilder, 5 Quellen
Aufsatz (Zeitschrift)
Englisch
Analysis of panels with multiple site damage
AIAA | 1994
|Strength of Stiffened Panels with Multiple Site Damage
SAE Technical Papers | 1999
|Residual Strength of Panels with Multiple Site Damage
Online Contents | 1996
|Residual strength of panels with multiple site damage
AIAA | 1996
|Fatigue life of panels with multiple site damage
AIAA | 1996
|