Journal of Applied Science and Engineering

Published by Tamkang University Press


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Ganjar Pramudi1, WijangWisnu Raharjo This email address is being protected from spambots. You need JavaScript enabled to view it.2, and Dody Ariawan2

1Graduate School of Mechanical Engineering, Sebelas Maret University, Jl. Ir. Sutami 36A, Surakarta, Indonesia
2Mechanical Engineering Department, Sebelas Maret University, Jl. Ir. Sutami 36A, Surakarta 57126, Indonesia


Received: October 22, 2021
Accepted: December 16, 2021
Publication Date: December 23, 2021

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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Sandwich panels composed of two skins separated by a core in the middle have attracted many researchers to develop lightweight structural materials that can be assembled quickly. This article will discuss the flexural strength of each skin, core, and sandwich panel. The composite sandwich skin is made of Recycled Carbon Fibre (RCF)/unsaturated polyester with a thickness of 2 mm. The face has a low density of 1.6 g/cm3 and is more economical because of the recycled carbon fibre. RCF was taken through the solvolysis process by degrading the resin on the carbon fibre. Polyurethane reinforced with five layers of Cotton Mesh Fabric (CMF) is used as the core with various thicknesses of 50 mm, 75 mm, and 100 mm. CMF reinforcement made of polyester has a density of 0.03 g/cm3. The results showed that increasing the fiber content by 40% raised the RCF/unsaturated polyester skin’s bending strength to 220.7 MPa. Due to the higher fibre content, stress can be spread evenly. In addition, the flexural strength of the polyurethane core increases up to 2.1 MPa with the addition of CMF. Sandwiches with a 50 mm core have a flexural strength of 59.07 MPa. It is higher than the 75 mm and 100 mm thicknesses. It is due to an increase in the moment of inertia and stiffness of the composite material. This lightweight and strong sandwich composite can be used as an earthquake-resistant wall panel.

Keywords: Cotton Mesh Fabric, Sandwich Panel, Core Polyurethane, Skin Recycled Carbon Fiber


  1. [1] W. D. Callister and D. G. Rethwisch. Materials science and engineering. 5. John wiley & sons New York, 2011.
  2. [2] G. Dhaliwal and G. Newaz, (2020) “Flexural response of degraded polyurethane foam core sandwich beam with initial crack between facesheet and core" Materials 13(23): 1–18. DOI: 10.3390/ma13235399.
  3. [3] N. Uddin, A. Vaidya, U. Vaidya, and S. Pillay. “Thermoplastic composite structural insulated panels (CSIPs) for modular panelized construction”. In: Developments in Fiber-Reinforced Polymer (FRP) Composites for Civil Engineering. Elsevier, 2013, 302–316.
  4. [4] A. Petras and M. Sutcliffe, (2000) “Indentation failure analysis of sandwich beams" Composite Structures 50(3): 311–318. DOI: 10.1016/S0263-8223(00)00122-7.
  5. [5] Z. Salleh, M. Islam, J. Epaarachchi, and H. Su, (2016) “Mechanical properties of sandwich composite made of syntactic foam core and GFRP skins" AIMS Materials Science 3(4): 1704–1727. DOI: 10.3934/matersci.2016.4.1704.
  6. [6] S.-S. Shi, Z. Sun, X.-Z. Hu, and H.-R. Chen, (2014) “Carbon-fiber and aluminum-honeycomb sandwich composites with and without Kevlar-fiber interfacial toughening" Composites Part A: Applied Science and Manufacturing 67: 102–110. DOI: 10.1016/j.compositesa.2014.08.017.
  7. [7] F. Avilés and L. Carlsson, (2006) “Experimental study of debonded sandwich panels under compressive loading" Journal of Sandwich Structures and Materials 8(1): 7–31. DOI: 10.1177/1099636206054996.
  8. [8] J. Xiong, A. Vaziri, R. Ghosh, H. Hu, L. Ma, and L. Wu, (2016) “Compression behavior and energy absorption of carbon fiber reinforced composite sandwich panels made of three-dimensional honeycomb grid cores" Extreme Mechanics Letters 7: 114–120. DOI: 10.1016/j.eml.2016.02.012.
  9. [9] Y. Xiao, Y. Hu, J. Zhang, C. Song, X. Huang, J. Yu, and Z. Liu, (2018) “The Bending Responses of Sandwich Panels with Aluminium Honeycomb Core and CFRP Skins Used in Electric Vehicle Body" Advances in Materials Science and Engineering 2018: DOI: 10.1155/2018/5750607.
  10. [10] P. Yang, Q. Zhou, X.-X. Yuan, J. Van Kasteren, and Y.-Z.Wang, (2012) “Highly efficient solvolysis of epoxy resin using poly(ethylene glycol)/NaOH systems" Polymer Degradation and Stability 97(7): 1101–1106. DOI: 10.1016/j.polymdegradstab.2012.04.007.
  11. [11] Y. Khalil, (2019) “Sustainability assessment of solvolysis using supercritical fluids for carbon fiber reinforced polymers waste management" Sustainable Production and Consumption 17: 74–84. DOI: 10.1016/j.spc.2018.09.009.
  12. [12] C. Chaabani, E.Weiss-Hortala, and Y. Soudais, (2017) “Impact of Solvolysis Process on Both Depolymerization Kinetics of Nylon 6 and Recycling Carbon Fibers from Waste Composite" Waste and Biomass Valorization 8(8): 2853–2865. DOI: 10.1007/s12649-017-9901-5.
  13. [13] Y. Thyavihalli Girijappa, S. Mavinkere Rangappa, J. Parameswaranpillai, and S. Siengchin, (2019) “Natural Fibers as Sustainable and Renewable Resource for Development of Eco-Friendly Composites: A Comprehensive Review" Frontiers in Materials 6: DOI: 10.3389/fmats.2019.00226.
  14. [14] M. Sanjay, S. Siengchin, J. Parameswaranpillai, M. Jawaid, C. Pruncu, and A. Khan, (2019) “A comprehensive review of techniques for natural fibers as reinforcement in composites: Preparation, processing and characterization" Carbohydrate Polymers 207: 108–121. DOI: 10.1016/j.carbpol.2018.11.083.
  15. [15] P. Ardiyanto, P. Suwarta, I. Sidharta, W. Wijanarko, et al. “Thickness Effect of Polyurethane Foam Core on the Flexural Behaviour of Composite Sandwich Materials”. In: Applied Mechanics and Materials. 758. Trans Tech Publ. 2015, 1–6.
  16. [16] S. B. Loganathan, H. K. Shivanand, et al., (2015) “Effect of core thickness and core density on low velocity impact behavior of sandwich panels with PU foam core" Journal of Minerals and Materials Characterization and Engineering 3(03): 164.
  17. [17] W.Witkiewicz and A. Zieli ´ nski, (2006) “Properties of the polyurethane (PU) light foams" Advances in Materials Science 6(2): 35–51.
  18. [18] Y. Rostamiyan and H. Norouzi, (2016) “Flatwise Compression Strength and Energy Absorption of Polyurethane Foam-Filled Lattice Core Sandwich Panels" Strength of Materials 48(6): 801–810. DOI: 10.1007/s11223-017-9827-y.
  19. [19] E. Labans, K. Kalnins, and C. Bisagni, (2019) “Flexural behavior of sandwich panels with cellular wood, plywood stiffener/foam and thermoplastic composite core" Journal of Sandwich Structures and Materials 21(2): 784–805. DOI: 10.1177/1099636217699587.
  20. [20] R. Jayaram, V. Nagarajan, and K. Vinod Kumar, (2017) “Polyester pinning effect on flexural and vibrational characteristics of foam filled honeycomb sandwich panels" Latin American Journal of Solids and Structures 14(7): 1314–1326. DOI: 10.1590/1679-78253688.
  21. [21] Y. Gupta, A. Jacob, A. Mohanty, et al., (2020) “Effect of the core thickness on the flexural behaviour of polymer foam sandwich structures" IOP SciNotes 1(2): 024404.
  22. [22] P. Jagadeesh, Y. Thyavihalli Girijappa, M. Puttegowda, S. Rangappa, and S. Siengchin, (2020) “Effect of natural filler materials on fiber reinforced hybrid polymer composites: An Overview" Journal of Natural Fibers: DOI: 10.1080/15440478.2020.1854145.
  23. [23] M. Hemath, S. Mavinkere Rangappa, V. Kushvaha, H. Dhakal, and S. Siengchin, (2020) “A comprehensive review on mechanical, electromagnetic radiation shielding, and thermal conductivity of fibers/inorganic fillers reinforced hybrid polymer composites" Polymer Composites 41(10): 3940–3965. DOI: 10.1002/pc.25703.
  24. [24] I. I. Marhoon, (2017) “Mechanical and physical properties of polyurethane composites reinforced with carbon black N990 particles" International Journal of Scientific & Technology Research 6(08): 225–228.
  25. [25] I. ASTM, (2003) “Standard test methods for flexural properties of unreinforced and reinforced plastics and electrical insulating materials" ASTM D790:
  26. [26] I. ASTM, (2000) “Standard Test Method for Flexural Properties of Sandwich Constructions" ASTM C393:
  27. [27] M. Akonda, M. Stefanova, P. Potluri, and D. Shah, (2017) “Mechanical properties of recycled carbon fibre/polyester thermoplastic tape composites" Journal of Composite Materials 51(18): 2655–2663. DOI: 10.1177/0021998316672091.
  28. [28] M. Boulanghien, M. R’Mili, G. Bernhart, F. Berthet, and Y. Soudais, (2018) “Mechanical Characterization of Carbon Fibres Recycled by Steam Thermolysis: A Statistical Approach" Advances in Materials Science and Engineering 2018: DOI: 10.1155/2018/8630232.
  29. [29] G. Jiang, S. J. Pickering, E. Lester, P. Blood, N. Warrior, and S. Pickering. “Recycling carbon fibre/epoxy resin composites using supercritical propanol”. In: 16th International Conference on Composite Materials, Kyoto, Japan. Japan Society for Composite Materials Kyoto, Japan. 2007.
  30. [30] G. Maradini, M. Oliveira, L. Carreira, D. Guimarães, D. Profeti, A. Dias Júnior, W. Boschetti, B. Oliveira, A. Pereira, and S. Monteiro, (2021) “Impact and tensile properties of polyester nanocomposites reinforced with conifer fiber cellulose nanocrystal: A previous study extension" Polymers 13(11): DOI: 10.3390/polym13111878.
  31. [31] G. Gündüz, D. Erol, and N. Akka¸s, (2005) “Mechanical properties of unsaturated polyester-isocyanate hybrid polymer network and its E-glass fiber-reinforced composite" Journal of Composite Materials 39(17): 1577–1589. DOI: 10.1177/0021998305051086.
  32. [32] G. Glória, M. Teles, F. Lopes, C. Vieira, F. Margem, M. Gomes, and S. Monteiro, (2017) “Tensile strength of polyester composites reinforced with PALF" Journal of Materials Research and Technology 6(4): 401–405. DOI: 10.1016/j.jmrt.2017.08.006.
  33. [33] R. Rajan, J. Riihivuori, E. Rainosalo, M. Skrifvars, and P. Järvelä, (2014) “Effect of viscose fabric modification on the mechanical and water absorption properties of composites prepared through vacuum infusion" Journal of Reinforced Plastics and Composites 33(15): 1416–1429. DOI: 10.1177/0731684414534748.
  34. [34] M. Sanjay, P. Madhu, M. Jawaid, P. Senthamaraikannan, S. Senthil, and S. Pradeep, (2018) “Characterization and properties of natural fiber polymer composites: A comprehensive review" Journal of Cleaner Production 172: 566–581. DOI: 10.1016/j.jclepro.2017.10.101.
  35. [35] M. K. Gupta and R. Gond, (2017) “Influence of concentrations of alkali treatment on mechanical and dynamic mechanical properties of hemp/polyester composite" American J Polym Sci Eng 5: 24–33.
  36. [36] N. Bonnia, S. Ahmad, I. Zainol, A. Mamun, M. Beg, and A. Bledzki, (2010) “Mechanical properties and environmental stress cracking resistance of rubber toughened polyester/kenaf composite" Express Polymer Letters 4(2): 55–61. DOI: 10.3144/expresspolymlett.2010.10.
  37. [37] M. Azmi, H. Abdullah, and M. Idris. “Properties of polyurethane foam/coconut coir fiber as a core material and as a sandwich composites component”. In: 50. 1. 2013. DOI: 10.1088/1757-899X/50/1/012067.
  38. [38] J. Li, Q. Yan, and Z. Cai, (2021) “Mechanical properties and characteristics of structural insulated panels with a novel cellulose nanofibril-based composite foam core" Journal of Sandwich Structures and Materials 23(5): 1701–1716. DOI: 10.1177/1099636220902051.
  39. [39] A. Mirzapour, M. Beheshty, and M. Vafayan, (2005) “The response of sandwich panels with rigid polyurethane foam cores under flexural loading" Iranian Polymer Journal (English Edition) 14(12): 1082–1088.



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