Çapraz tabakalı ve açılı-tabakalı kompozit konsol kirişlerin serbest titreşim analizi

Bu çalışmada çapraz-tabakalı ve açılı-tabakalı kompozit kirişlerin serbest titreşim analizi, sonlu elemanlar yöntemiyle yapılmıştır. Çözüm için ANSYS 8.0 yazılım paketinden yararlanılmıştır. Geliştirilen sonlu elemanlar modeliyle hesaplanan doğal frekanslar, literatürde mevcut ve farklı yöntemlerle elde edilmiş sonuçlarla karşılaştırılarak tamamen uyumlu oldukları gösterilmiş; böylece modelin doğrulaması yapılmıştır. Daha sonra, yaygın olarak karşılaşılan ankastre-serbest sınır şartları (konsol kiriş) için tabaka sayısının, boy/kalınlık oranının ve tabaka açılarının düzlem-dışı eğilme titreşimi doğal frekansına etkileri araştırılmıştır. Simetrik ve anti-simetrik diziliş durumları ayrı ayrı incelenmiştir. Sonuçlar tablo ve grafiklerle gösterilmiştir.

Free vibration analysis of cross-ply and angle-ply laminated composite cantilever beams

In this study, free vibration analysis of cross-ply and angle-ply laminated composite beams is carried out by finite element method. ANSYS 8.0 software package is used for this purpose. The natural frequencies computed by the finite element model developed are compared with those present in the literature and obtained by other methods. The comparison with the reported values is quite good; therefore, the finite element model used in this study is verified. Subsequently, the effects of number of layers, length-to-thickness ratio and layer orientation angle on the natural frequencies of out-of-plane bending vibrations are investigated for the common clamped-free boundary conditions (cantilever beam). Symmetric and anti-symmetric stacking sequences are examined separately. The results are illustrated in tabular and graphical form.

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