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Stress analysis of an orthotropic plate with a plugged center hole
Advanced composite materials, while offering the potential to increase aircraft capabilities while minimizing weight, are more susceptible to damage than conventional aircraft materials. Improved inspection and repair methods are required to ensure structural integrity and aircraft readiness in the existing operational environment. This paper examines the effects of bonding a plug in a centrally located hole in a composite plate on the stress concentration around the hole. The goal of this investigation was to evaluate the repaired strength of damaged composite panels subjected to in-plane loads. The research consisted of five steps. First, finite element analyses were conducted to predict the effectiveness of the bonded plug. Testing was conducted to experimentally evaluate the bonded plug concept and to validate the analytical predictions. The analytical models were then refined based on the results of the testing. The finite element results were compared with a known elasticity solution based on conformal mapping theory. Finally, a series of parametric finite element analyses were conducted to predict the effects of various parameters on the effectiveness of the plug, including hole size, plug orientation in the hole, adhesive modulus, and bondline thickness.
Stress analysis of an orthotropic plate with a plugged center hole
Advanced composite materials, while offering the potential to increase aircraft capabilities while minimizing weight, are more susceptible to damage than conventional aircraft materials. Improved inspection and repair methods are required to ensure structural integrity and aircraft readiness in the existing operational environment. This paper examines the effects of bonding a plug in a centrally located hole in a composite plate on the stress concentration around the hole. The goal of this investigation was to evaluate the repaired strength of damaged composite panels subjected to in-plane loads. The research consisted of five steps. First, finite element analyses were conducted to predict the effectiveness of the bonded plug. Testing was conducted to experimentally evaluate the bonded plug concept and to validate the analytical predictions. The analytical models were then refined based on the results of the testing. The finite element results were compared with a known elasticity solution based on conformal mapping theory. Finally, a series of parametric finite element analyses were conducted to predict the effects of various parameters on the effectiveness of the plug, including hole size, plug orientation in the hole, adhesive modulus, and bondline thickness.
Stress analysis of an orthotropic plate with a plugged center hole
Spannungsanalyse einer orthotropen Platte mit verstopfter Zentrierbohrung
Hindman, T.W. (author) / Horn, W.J. (author)
1996
9 Seiten, 2 Bilder, 16 Quellen
Conference paper
English
Spannungsanalyse , orthotrope Platte , Bohrung (Spanen) , Zentrieren , Verbundwerkstoff , Luftfahrttechnik , Gewichtsminimierung , Inspektion , Reparatur , Betriebsbereitschaft , Stopfen (Verschluss) , Spannungskonzentration , Festigkeit , Beschädigung , Finite-Elemente-Methode , Test (Prüfung) , Vorhersage , Modell , Elastizität
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