PSI - Issue 41

Muhammad Arif Husni Mubarok et al. / Procedia Structural Integrity 41 (2022) 282–289 Mubarok et al. / Structural Integrity Procedia 00 (2022) 000–000

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4. Conclusions Numerical investigations of the sandwich panels' dynamic response and energy-absorbing ability have been carried out. Simulations were carried out using three different variations of the core geometry; Honeycomb, Stiffener, and Corrugated with equations using structural weights. This research was carried out using mild steel, which has the advantage of a low-cost material with properties suitable for most engineering applications, exhibits a ductile and stable mechanical behavior of plastics, and provides a controlled and stable failure mode during the absorption of impact energy. Data is displayed up to a time interval of 0.2 s after the explosion. This study found that the honeycomb sandwich panel structure got the best results compared to all models. Parametric studies show that the existing geometric shapes strongly influence the displacement of the face sheet. The honeycomb model gets a small result at the maximum displacement, which proves that the honeycomb model has the best energy absorption. In the Von mises stress distribution, honeycomb also has better contours than all models. This model can reduce damage better than the stiffener and corrugated models at the point of impact. The honeycomb core structure is concluded to provide the necessary support stiffness to spread the impact force at the contact points throughout the structure to obtain good results. Acknowledgments This work was supported by the RKAT PTNBH Universitas Sebelas Maret - Year 2022, under Research Scheme of “Penelitian Kolaborasi Internasional” (KI-UNS), with Research Grant/Contract No. 254/UN27.22/PT.01.03/2022. The support is gratefully acknowledged by the authors. References Chen, A., Louca, L.A., Elghazouli, A.Y., 2015. Blast assessment of steel switch boxes under detonation loading scenarios. International Journal of Impact Engineering 78, 51–63. 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