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FROM:
Mrutyunjay Rout and Amit Karmakar (Department of Mechanical Engineering, Jadavpur University, Kolkata, India),
“Free vibration of rotating twisted composite stiffened plate”, Proceedings of the First International Conference on Mechanical Engineering, Jadavpur University, Kolkata, India, January 4-6, 2018, Paper No. INCOM18-039, 2018
ABSTRACT: The paper presents a finite element model based on first-order shear deformation theory to investigate the free vibration response of the rotating twisted composite stiffened plate. An eight noded isoparametric plate element having five degrees of freedom per node is combined with a three node disoparametric beam element of four degrees of freedom per node for modelling the plate and the stiffener element, respectively. The formulation adopted here employs constraint technique to calculate stiffness and mass matrices of the stiffener element placed inside the plate element, wherein the nodal degrees of freedom of the stiffener element are transferred to the plate element considering curvature and eccentricity to maintain the compatibility between plate and stiffener. The advantage of such method is that there is no further increase in the total number of degrees of freedom due to addition of the stiffener, thereby reducing the computational time.
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