Abstract
Traditional materials are being replaced by fiber-reinforced composite due to its significantly high values for specific strength and stiffness. One of major modes of failure in composite laminates is delamination. The service conditions and manufacturing process of the laminated plate are the causes of delamination. Unless incipient delamination is not identified and arrested; localized stress will escalate in and around the vicinity of the delaminated zone. This localized stress steps up the rate of delamination, ultimately causing failure of composite structure. Thus, investigation of the dynamic characteristics of the delaminated composite structure becomes essential. Here, the effect of delamination at different interfaces on vibration characteristic of cantilever composite square plates made of several plies. This also includes the effect of shape, severity, and location of delamination on the vibration characteristics which is natural frequency of the plate. Several analytical and experimental results from the literature are used for comparison with results of modal analysis performed on the FE model created using ABAQUS software to verify and validate the model. The findings from research papers lead to the conclusion that modal parameters of delaminated plate are the potential indicator for identification of position, shape, severity, and location of delamination. The results were plotted on graphs to observe the effects of delamination parameters on natural frequencies for different modes of bending and twisting vibration. The effects of change in severity of delamination at different locations on fundamental natural frequency of bending as well as twisting were observed for given composite plates. It has been found that both the bending and twisting natural frequency values decrease with increase in delamination area and increase with change in interface from mid interface to top interface irrespective of plate thickness.
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Thote, N., Kulkarni, M., Kotambkar, M., Talekar, N. (2023). Effect of Various Delamination Areas in Several Interfaces on Fundamental Bending and Twisting Natural Frequency of Cantilever Square 8-ply and 16-ply Composite Plates. In: Manik, G., Kalia, S., Verma, O.P., Sharma, T.K. (eds) Recent Advances in Mechanical Engineering. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-2188-9_35
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DOI: https://doi.org/10.1007/978-981-19-2188-9_35
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