Nonlinear Modal Responses of Damaged Shell Structures: Numerical Prediction and Experimental Validation

What is it about?

This article reported the mathematical modelling of laminated structures with two kinds of damages (crack and delamination) to compute the nonlinear frequency responses. The distorted geometry of the panel has been modelled using full-scale nonlinearity via Green-Lagrange strain and the higher-order deformation polynomial kinematics to maintain necessary stress continuity. Further, the responses are obtained using the direct iterative method associated with nonlinear finite element steps. The model accuracy has been verified by comparing the obtained frequencies with the published analytical and/or numerical results. Additionally, a few experiments on the frequency are conducted for the damaged/intact composite panel to show the predicted solution adaptability. The model has been utilized to compute different numerical responses considering the essential structural-design parameters and the detailed inferences discussed.

Featured Image