Theoretical and experimental modal analysis of polymeric hybrid lap joint structure with and without damage

Abstract This research reported the eigenvalue responses of delaminated hybrid (adhesive and bolted) polymeric joint components using a simulation model via ABAQUS. First, a simulation model is developed into by combining two different eight‐noded elements for the glass‐fiber‐reinforced polymeric adherents (quadrilateral in‐plane general‐purpose continuum shell element, SC8R) and the adhesives (linear brick) for the discretization of the component. The necessary end boundary conditions are now adopted to compute the desired eigenvalues using Lanchzo's solution steps. Further, the model validity, including the element‐sensitive analysis, is performed by computing a few examples. In this regard, the responses are initially compared with numerical results available in the published domain and further verified with in‐house experimentation (intact and damaged). The frequency response of the developed model deviates from the published data by a maximum of 15%. Similarly, the numerical frequency response deviates from the experimental findings, ranging from a minimum of 1.13% to a maximum of 18.5%. Based on the model's accuracy and consistency, the simulation model of the hybrid polymeric joint structure is extended further to evaluate the influences of geometrical parameters and delamination. Finally, a set of recommendations is illustrated from the numerical experimentation of the intact/damaged hybrid lap joint structure. The fiber layup orientation, boundary condition, and aspect ratio significantly impact the natural frequency response of adhesively bonded joints. Highlights The hybrid joint modal responses are investigated numerically, including delamination. Two types of joints (adhesive and anchored with bolt) are utilized for the component fabrication. The simulated frequency values are verified with in‐house experimentation. The effect of delamination on hybrid joint frequency is computed via numerical experimentation.