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Steel and Composite Structures Volume 53, Number 3, November 2024 , pages 285-300 DOI: https://doi.org/10.12989/scs.2024.53.3.285 |
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Dynamic response of hybrid composite semi-ellipsoidal dome structure: Numerical and experimental investigations |
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Hariharan Elangovan, Surekha Gnanasekar, Venugopal Barathan, Senthamizh Selvan Samuel, Mutra Rajasekhara Reddy and Vasudevan Rajamohan
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| Abstract | ||
| This research concentrates on the exploration of the free vibration of a multi-walled carbon nanotube (MWCNT)- reinforced semi-ellipsoidal composite dome. A glass fiber-reinforced composite laminated dome without and with MWCNT reinforcement is considered for numerical analysis. Free vibration analysis is carried out numerically using ANSYS to determine the natural frequencies and mode shapes at various boundary conditions. In addition, the efficiency of the numerical analysis has been proven by conducting an experimental examination on a prototype dome with and without MWCNT reinforcement and comparing the results with those obtained numerically and experimentally. Parametric studies such as the influence of MWCNT wt.%, the aspect ratio of the dome, slenderness ratio of the dome, etc., with and without MWCNT reinforcement is performed to determine the dynamic behaviour. It was noted that clamped end conditions of the hybrid composite domes provide the highest natural frequencies among the numerous end conditions considered. Also, the hybrid composite dome with 1.5 wt.% CNT reinforcement yields the highest natural frequencies at all the end conditions, beyond which the amalgamation of CNT content decreases the natural frequencies of the structures. Furthermore, composite dome "S1" with 0° orientation and "S4" with 45° orientation yields the highest and the lowest natural frequencies. | ||
| Key Words | ||
| aspect ratio; multi-walled carbon nanotube; semi-ellipsoidal composite dome; stacking sequences | ||
| Address | ||
| Hariharan Elangovan:School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu, India – 63201 Surekha Gnanasekar:School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu, India – 63201 Venugopal Barathan:Enercon Wind Energy Pvt Ltd, Bangalore, India Senthamizh Selvan Samuel:School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu, India – 632014 Mutra Rajasekhara Reddy:School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu, India – 632014 Vasudevan Rajamohan:School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu, India – 632014 | ||