PSI - Issue 48

Ilham Bagus Wiranto et al. / Procedia Structural Integrity 48 (2023) 65–72 Wiranto et al. / Structural Integrity Procedia 00 (2023) 000 – 000

71

7

progressively to absorb energy are effective energy absorption devices. Altering the energy absorber's geometry shape has always been an effective approach to improving the crashworthiness behavior of components.

Fig. 3. Proposed experimental setup for future studies

After reviewing the current research of CFRP crashworthiness, it is known that huge opportunities are available in this field of research. Moreover, many studies are still focusing on thin-walled structure shape subjected to drop-test event and analyzing its energy absorption. Thus, it is recommended to draw more attention to investigating the crashworthiness performance of stiffened CFRP composite panel plate under axial impact. It is also suggested to bring the test using a drop test impact facility, equipped with multi sensors (i.e., strain gauge, load cell, and high speed cameras) in order to obtained a comprehensive understanding. The proposed experimental setup including a specimen geometry are shown in Fig. 3. Moreover, to investigate the energy absorption of this structure, it is recommended to set up various crash scenario by varying the drop height and impact weight. In addition, the structural deformation must be captured and understood using high speed camera. Finally, numerical studies are highly recommended to compare the data obtained from experimental studies. Numerical studies can lead to a wider range of applications and able to test more complicated geometry before conducted the real test (cost-effective). 4. Conclusions In this paper, an overview of several research studies on crashworthiness performance of composite structure area is presented. The recent studies of experimental drop test setup, effect of geometry, and composite material are briefly discussed. With the increasing number of deaths, injuries, and property damage resulting from catastrophic crashes, researchers have been exploring more efficient ways to prevent such incidents. Energy absorbing structures made from composite materials have been found to have higher crashworthiness performance than their metallic counterparts due to their lightweight, higher strength, and higher specific stiffness. It has been shown that different geometries have varying capacities for absorbing energy, with some geometries offering higher specific energy absorption than others. In addition, the choice of composite materials and fabrication techniques can significantly affect their ability to absorb energy. Finally, some suggestion for future studies have been given. Acknowledgements This work is part of the research scope of Numerical Testing and Validation of Crashworthiness Analysis in Composite Fuselage Design of Unmanned Aerial Vehicle (UAV) in collaboration with the Department of Mechanical Engineering Universitas Sebelas Maret, Surakarta, supported by The Nanotechnology and Materials Research Organi zation BRIN through the Fundamental Molecular Science Research Program 2023. References Abdullah, N.A., Sani, M.S., Salwani, M.S., Husain, N.A. (2020). A review on crashworthiness studies of crash box structure. Thin-Walled Structures, 153, 106795.