Akademik Veri Yönetim Sistemi
Pamukkale University Journal of Engineering Sciences, cilt.0, sa.0, ss.0-10, 2021 (ESCI)
A shear-deformable beam theory is proposed to model the torsional
behavior of laminated beams composed of variable stiffness layers. The
displacement field is derived by expanding mid-surface displacements
in Taylor series in width coordinate and by retaining first-order terms.
Stiffness of the beam is made variable by using curvilinear fibers in
layers. Variable stiffness layers are categorized into three types as
symmetric, asymmetric and anti-symmetric based on their fiber paths.
A displacement-based finite element method is used to solve the
analytical model and to predict rotations of the beam under torsional
load. Beams constructed with symmetric, antisymmetric and
asymmetric variable stiffness layers are investigated for several lay-ups
by both including and neglecting axial displacement terms. Acquired
results are compared with the results of a finite element analysis
software. It is observed that the developed model is working properly
for beams with variable stiffness layers and including axial
displacement terms in calculations improved the model`s performance.