On the vibration of size dependent rotating laminated composite and sandwich microbeams via a transverse shear-normal deformation theory
Küçük Resim Yok
Tarih
2019
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Sci Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this paper, the eigenfrequencies of rotating laminated composite (LC) and sandwich microbeams with different boundary conditions (BCs) are studied. The size-dependent variational formulation of the problem is obtained based on the Modified Couple Stress Theory (MCST) by employing a transverse shear-normal deformable beam theory and finite element method (FEM) formulation. The convergence and verification studies of the developed code are carried out and computed results in terms of dimensionless fundamental frequencies (DFFs) are compared with the available ones in the open literature. Various BCs, aspect ratios, fiber orientation angles, thickness to material length scale parameter (MLSP) ratios, core thickness to face layer thickness ratios, dimensionless rotation speeds (DRSs) and hub ratios are employed for the extensive analyses. It is found that the DFFs of the LC microbeams are highly affected by the small size effect accompanying with the orthotropy ratios, DRSs, hub ratios and fiber orientation angles. The effect of the small size on the DFFs of the rotating clamped-clamped LC microbeams is more pronounced than on those of the rotating clamped-free LC microbeams. The hub ratio has a significant effect on the DFFs of the rotating LC microbeams than the rotation speed.
Açıklama
Anahtar Kelimeler
Rotating Microbeam, Modified Couple Stress Theory, Finite Element Method, Laminated Composite, Free Vibration, Couple Stress Theory, Functionally Graded Timoshenko, Flapwise Vibration, Buckling Analysis, Bending Analysis, 4-Unknown Shear, Euler-Bernoulli, Beams, Model, Microscale
Kaynak
Composite Structures
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
216
