Experimental and Theoretical Deflections of Hybrid Composite Sandwich Panel under Four-point Bending Load

Jauhar Fajrin, Yan Zhuge, Hao Wang, Frank Bullen


This paper presents a comparison of theoretical and experimental deflection of a hybrid sandwich panel under four-point bending load. The paper initially presents few basic equations developed under three-point load, followed by development of model under four-point bending load and a comparative analysis between theoretical and experimental results. It was found that the proposed model for predicting the deflection of hybrid sandwich panels provided fair agreement with the experimental values. Most of the sandwich panels showed theoretical deflection values higher than the experimental values, which is desirable in the design. It was also noticed that the introduction of intermediate layer does not contribute much to reduce the deflection of sandwich panel as the main contributor for the total deflection was the shear deformation of the core that mostly determined by the geometric of the samples and the thickness of the core.


Deflection; four-point bending; hybrid sandwich panel; theoretical model.

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  1. Mamalis, A.G., Spentzas, K.N., Pantelelis, N.G., Manolakos, D.E., and Ionnidis, M.B., A New Hybrid Concept for Sandwich Structures, Composite Structures, 83, 2008, pp. 335340.[CrossRef]
  2. Fajrin, J., Zhuge, Y., Bullen, F., and Wang, H., The Implementation of Statistical Inference to Study the Bending Strength of Sustainable Hybrid Sandwich Panel, Advanced Material Research, 250253, 2011, pp. 956961.[CrossRef]
  3. Fajrin, J., Zhuge ,Y., Bullen, F., and Wang, H., Significance Analysis of Flexural Behaviour of Hybrid Sandwich Panels, Open Journal of Civil Engineering, 3, 2013, pp. 17. [CrossRef]
  4. Fajrin, J., Alternative Theoretical Frameworks for Hybrid Sandwich Panel with Intermediate Layer, Jurnal Rekayasa Sipil, 11(2), 2015, pp 111.[CrossRef]
  5. Fajrin, J., The Application of Statistical Design of Experiments to Study The InPlane Shear Behaviour of Hybrid Composite Sandwich Panel, Civil Engineering Dimension, 18(1), 2016, pp 2530.[CrossRef]
  6. Davies, J.M., Lightweight Sandwich Construc¬tion, Blackwell Science, 2001, London.[CrossRef]
  7. Zenkert, D., An Introduction to Sandwich Construction, Solihull, EMAS, 1995.[CrossRef]
  8. Deshpande, V.S., The Design of Sandwich Panels with Foam Cores, Lecturing Handout, Cambridge University, 2002.[CrossRef]
  9. ASTM Standard C 39300, Standard Test Method for Flexural Properties of Sandwich Construction, ASTM International, 2000, Phila¬delphia, Pa 19103.[CrossRef]
  10. Roylance, D., Beam Displacements, Department of Materials Science and Engineering, Massa¬chusetts Institute of Technology, 2000, Cam¬bridge, USA.[CrossRef]
  11. Manalo, A., Aravinthan, T., Karunasena, W., and Islam M.M., Flexural Behavior of Structural Fiber Composite Sandwich Beams in Flatwise and Edgewise Positions, Composite Structures, 92 (4), 2010, pp. 984995.[CrossRef]
  12. Somayaji, S., Civil Engineering Materials, Pren¬tice Hall, 1995, Englewood, New Jersey, USA.[CrossRef]
  13. Teles, R.F., Menezzi, C.H.S., Souza, F., and Souza M.R., Theoretical and Experimental Deflections of Glued Laminated Timber Beams Made from Tropical Hardwood, Wood Material Science and Engineering, 2012, pp. 16. [CrossRef]
  14. Sharaf, T., Shawkat, W., and Fam, A., Struc¬tural Performance of Sandwich Wall Panels with Different Foam Core Densities in OneWay Bending, Journal of Composite Materials, 44 (19), 2010, pp. 22492263.[CrossRef]


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