Journal of Science and Technology of Composites

Journal of Science and Technology of Composites

Numerical Simulation of the Bending Response of Biodegradable Sandwich Panels with Various Core Shapes and Materials by Finite Element Method

Document Type : Research Paper

Authors
Seyed Mohammad Reza Khalili
Saeed Habibi
Ali Akbar Taheri
Faculty of Mechanical Engineering, K.N.Toosi University of Technology, Tehran, Iran.
10.22068/jstc.2025.2050700.1913
Abstract
Biodegradable sandwich panels, as a new generation of environmentally friendly structures, have attracted considerable attention due to their ability to return to nature at the end of their service life. In this study, the flexural behavior of such panels was numerically investigated using the finite element method. The panel structure consists of flax fiber-reinforced skins and cores with various geometric configurations made from composite, wooden, and aluminum materials. Simulations were performed under identical loading conditions. The main objective was to evaluate and compare the mechanical performance of different core configurations in terms of stress distribution and energy absorption capacity. The results indicated that the combination of core shape and material has a significant influence on the flexural behavior of the panels. Overall, cores with curved geometries such as C-shaped and W-shaped exhibited superior performance compared to other shapes, while R-shaped and X-shaped cores showed the weakest results. Furthermore, although aluminum cores provided more uniform stress distribution, wooden and composite cores demonstrated better energy absorption performance. These findings can serve as a basis for the optimal design of biodegradable sandwich panels in structural applications.
Keywords
Biodagradable Composite
sandwich panel
corrugated core
Bending strength
Numerical Simulation

Subjects

[1] Shrivastava, A., Dondapati, S., “Biodegradable composites based on biopolymers and natural bast fibres: A review,” Materials Today: Proceedings, Vol. 46, pp. 1420–1428, 2021.
[2] Smardzewski, J., “Wooden sandwich panels with prismatic core – Energy absorbing capabilities,” Composite Structures, Vol. 230, p. 111535, 2019.
[3] Ávila De Oliveira, L., Coura, G. L. C., PassaiaTonatto, M. L., Panzera, T. H., Placet, V., Scarpa, F., “A novel sandwich panel made of prepreg flax skins and bamboo core,” Composites Part C: Open Access, Vol. 3, p. 100048, 2020.
[4] Sarwar, A., Mahboob, Z., Zdero, R., Bougherara, H., “Mechanical characterization of a new Kevlar/Flax/epoxy hybrid composite in a sandwich structure,” Polymer Testing, Vol. 90, p. 106680, 2020.
[5] CoDyre, L., Mak, K., Fam, A., “Flexural and axial behaviour of sandwich panels with bio-based flax fibre-reinforced polymer skins and various foam core densities,” Jnl of Sandwich Structures & Materials, Vol. 20, No. 5, pp. 595–616, 2018.
[6] Betts, D., Sadeghian, P., Fam, A., “Structural behavior of sandwich beams with flax fiber–reinforced polymer faces and cardboard cores under monotonic and impact loads,” J. Archit. Eng., Vol. 26, No. 2, p. 04020013, 2020.
[7] Beigpour, R., Khalili, S. M. R., Shokrollahi, H., “Lightweight biodegradable hybrid composite sandwich panel under three‐point bending loads—Experimental and numerical,” Polymer Composites, Vol. 43, No. 11, pp. 8007–8029, 2022.
[8] Ren, Y., Wang, N., Jiang, H., Liu, Z., “Numerical evaluation of planar compression performances of composite sandwich panel with X-, Y-, and A-shaped core,” Journal of Composite Materials, Vol. 55, No. 13, pp. 1835–1849, 2021.
[9] Hamidin, F., Farrokhabadi, A., Ahmadi, H., “The effect of core shape on the bending response of sandwich panels with filled and unfilled sine and square corrugated cores,” J Fail. Anal. and Preven., Vol. 21, No. 2, pp. 537–546, 2021.
[10] Jiang, Q., Chen, G., Kumar, A., Mills, A., Jani, K., Rajamohan, V., Venugopal, B., Rahatekar, S., “Sustainable sandwich composites manufactured from recycled carbon fibers, flax fibers/pp skins, and recycled pet core,” J. Compos. Sci., Vol. 5, No. 1, p. 2, 2020.
[11] Dastan, T., Safian, A., Sheikhzadeh, M., “The crashworthiness performance of integrally woven sandwich composite panels made using natural and glass fibers,” Journal of Composite Materials, Vol. 55, No. 9, pp. 1279–1292, 2021.
[12] Yang, Y., Fahmy, M.F., Pan, Z., Zhan, Y., Wang, R., Wang, B., Feng, B., “Experimental study on basic mechanical properties of new BFRP-bamboo sandwich structure,” Construction and Building Materials, Vol. 264, p. 120642, 2020.
[13] Zurnaci, E., Gokkaya, H., Nalbant, M., Sur, G., “Three-point bending response of corrugated core metallic sandwich panels having different core configurations – an experimental study,” Eng. Technol. Appl. Sci. Res., Vol. 9, No. 2, pp. 3981–3984, 2019.
Journal of Science and Technology of Composites
Volume 12, Issue 1
Summer 2025
Pages 2659-2668