Dynamic behavior of hybrid composite shallow shell panel-FEM HOSDT and experimental approach

The dynamic behavior of the hybrid laminated composite shell panel structure has been investigated in this work, experimentally and numerically. To access the influence of hybridization, the glass-epoxy and the banana-epoxy lamina have been prepared and stacked together in various order using the hand lay-up method. The effective material properties like Young's modulus and shear modulus are obtained using the tensile test. In continuation, the experimental dynamic (frequency) responses are obtained using the in-house vibration test facility. Further, the limitation of the experimental work like time, cost, and repetition of experimentation for various sets of composites and to check the parametric effect on dynamic responses, leads to the development of the numerical model. The numerical approach/model of hybrid laminated composite is developed within the framework of higher-order shear deformation theory and the well-known finite element method. However, the energy method along with the Hamilton principle leads to the derivation of governing equation of vibration of a hybrid laminated shell panel. First of all, the numerical model's compatibility with the element has been checked via a numerical example. In addition to that, the model's accuracy has been verified by comparing the present dynamic responses with that of the experimentally predicted responses, responses predicted with ANSYS, and with the previously attempted numerical example responses. After the necessary and satisfactory treatment of the numerical model, a series of parametric studies have been carried out with an aim to investigate the influence of hybridization, geometry ratios, and shell type on dynamic responses. Finally, the suggestions/useful remarks for the future application of hybrid composite have been discussed in detail.