Abstract
The influences of hole dimension and position on the lateral buckling behaviour of woven fabric laminated composite cantilever beams having a square hole were investigated. Firstly, the theoretical, experimental and numerical characteristics of critical buckling loads of the beams without holes were investigated and compared with each other. It was shown that there is a good agreement among the theoretical, experimental and numerical results. The ANSYS finite element program was used for the numerical analyses. Furthermore, the numerical analyses of some models with various hole dimensions, different layer thicknesses, square shapes and fiber directions were performed by changing the distance between the hole. It is concluded for a square hole that the increase of the hole dimensions causes decrease of critical lateral buckling loads.
Kurzfassung
Die Einflüsse der Lochdimensionen und ihrer Position auf das laterale Beulverhalten von gewebelaminierten Kompositauslegern mit quadratischen Löchern wurden in der diesem Beitrag zugrunde liegenden Studie untersucht. Hierzu wurden zuerst die theoretischen, experimentellen und numerischen Untersuchungen der kritischen Beulbeanspruchungen der Träger ohne Löcher ermittelt und miteinander verglichen. Es zeigte sich, dass eine gute Übereinstimmung zwischen theoretischen, numerischen und experimentellen Ergebnissen bestand. Für die numerischen Analysen wurde das Finite Elemente Programm ANSYS eingesetzt. Außerdem wurden die numerischen Analysen von einigen Modellen mit verschiedenen Lochdimensionen, Lagendicken, quadratischen Formen und Faserausrichtungen ausgeführt, indem der Abstand zwischen den Löchern variiert wurde. Es stellte sich für das quadratische Loch heraus, dass eine Vergrößerung der Lochdimensionen die kritischen lateralen Beulbeanspruchungen herabsetzen.
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