Effect of Faces Type and Thickness on Mechanical Properties of Sandwich Panels

Document Type : Research Paper

Authors

Abstract

Sandwich panels are new kind of layered composites that usually are composed of three layers and their core layers thickness is higher but the top layers are determinative indetermination of the products strength and stiffness. In this study, effect of faces type and thickness on mechanical properties of sandwich panels was investigated. The variables included, faces type with 3, 4 and 5 mm thickness (beech face, popular face) and adhesive type (PMDI). After making panels, sampling test (based on DIN- EN 326-1) was considered. Mechanical properties of panels included modulus of elasticity as well as module of rupture (based on DIN- EN 310 standard) and impact bending strength (IBS) (based on ASTM- D 3499 standard) were measured. The gathered data were analyzed as completely randomized factorial design. The results showed that, the thickness of faces has a significant effect on the mechanical properties. With increasing thickness of 3 to 5 mm, modulus of rupture, modulus of elasticity and impact bending strength (IBS) increased. The interaction effect between species and thickness showed that using of beech genus with 5 mm thickness leads to increase of mechanical properties in sandwich panels.

Keywords

References

[1]     Yousefi, A., and Dehghani Firouzabadi, M.R., 2011. Production of honeycomb panels, using agricultural waste, National Conference of Agriculture, Islamic Azad University, Jahrom Branch. (In Persian).
[2]     Mazinani M., Rezaei, H., and Nikfarjam, M., 2007. Comparison between theory and experiment and balsa sheet honeycomb sandwich construction with cerebral vessels extremist, 9th Conference on Maritime, Noor- Mazandaran Province, p13. (In Persian).
[3]     Ebrahimi, G., 1989. Mechanical wood and composite products, Tehran University Press, 680p. (Translated to Persian).
[4]     Barbu, M., Ludtke, J., Thomen, H., and Welling, J., 2010. New technology for the continuous production of wood-based lightweight panels, Proceedings of the International Convention of Society of Wood Science and Technology andUnited Nations Economic Commission for Europe, Timber Committee, Geneva, Switzerland.
[5]     Ghofrani, M., Pishan, S., and Talaei, A., 2014. The Effect of Core Type and Skin on the Mechanical Properties of Lightweight Sandwich Panels, Iranian Journal of Wood and Paper Science Research 28(4): 720-731.
[6]     Nourbakhsh, A., Tabarsa, T., Kargarfard, A., and Golbabaei, F., 2001. Effect of species and thickness layer on mechanical properties woods layer (L.V.L), Iranian Journal of Wood and Paper Science Research 19(2): 211-224.
[7]     Barboutis, I., and Vassiliou, V., 2005. Strength properties of lightweight paper honeycomb panels for the furniture, In: Proceedings of International Scientific Conference, 10th Anniversary of Engineering Design (Interior and Furniture Design), 17-18 October, Sofia, p6.
[8]     Mirshokraei, S.A., 2001. Chemistry and technology wood adhesives, Tehran Center Academic Publishing, 350p. (Translated to Persian).
[9]     ASTM, standard, 2000. Standard test method for toughness of wood-base structural panel, American Society for Testing and material, D 3499.
[10] DIN (European Standard), EN 310, 1993. Wood- based panels: determination of modulus of elasticity in bending and of bending strength, CEN European Committee for Standardization.
[11] DIN (European Standard), EN 326-1, 1993. Wood- based panels, sampling, cutting and inspection. sampling and cutting of test pieces and expression of test results.
[12] Pflug, J., XinYu, F., Vangrimde, B., Verpoest, I., Bratfisch, P., and Vandepitte, D., 2004. Development of a sandwich material with polypropylene/natural fibre skins and paper honeycomb core, Proceedings of the 10th European Conference on Composites Materials.
[13] Jahanlatibari, A., Arab tabar Firouzjaei, H., Golbabaei, F., Kargarfard, A., Nourbakhsh, A., and Fakhrian roghani, A., 2000. The investigated production layers wooden (L.V.L, L.B) and determination of applications properties, Journal of Research Wood & Paper Iran 12(1): 1-38. (In Persian).
[14] William, L., and Bodig, J., 1989. Design and specification of hardwood laminated veneer- lumber for furniture application, Forest Products Journal, 38(1): 31-34.
[15] Saffari, M., Jabbari, M., Najafi, A., Tatari, A., and Ghaffari, M., 2013. The Effect of face and adhesive types on mechanical properties of sandwich panels made from honeycomb paper, Iranian Journal of Wood and Paper Industries 4(2): 141-152.
[16] Mo, X., Cheng, E., Wang, D., and Sun, X.S., 2003. Physical properties of medium density wheat straw particleboard using different adhesives. Industrial Ccrops and Products 18: 47-53.
[17] Papadopoulos, A.N., Hill, C.A.S., Traboulay, E., and Hague, J.R.B., 2002. Isocyanate resins for particleboard: PMDI vs EMDI, Holz als Roh- und Werkstoff 60: 81–83.
[18] Jabbari, M., Tatari, A., and Ghaffari, M., 2012. Investigation of mechanical properties of honeycomb sandwich panels for use in construction, The First National Conference on Lightweight Construction and insulation of buildings, Islamic Azad University, Bojnord Branch.
 

Files

Share

How to cite

Statistics