Experimental Study on Quasi-Static Response of Multi-layer Sandwich Composite Structures

Authors: S. Jedari Salami

Abstract:

In this paper the effects of adding an extra layer within a sandwich panel and core- types in top and bottom cores on quasi- static loading are studied experimentally. The panel includes polymer composite laminated sheets for faces and the internal laminated sheet called extra layer sheet, and two types of crushable foams are selected as the core material. Quasi- static tests were done by ZWICK testing machine on fully backed specimens with two foam cores, Poly Urethane Rigid (PUR) and Poly Vinyl Chloride (PVC). It was found that the core material type has made significant role on improving the sandwich panel’s behavior compared with the effect of extra layer location.

Keywords: Multi-layer sandwich structures, Internal sheet, Crushable foam, Top core, Bottom core.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1088896

References:

[1] M. Sadighi, M. Saadati,” Unequal faces effect on fracture of composite sandwich beam with flexible core,” Applied Composite Materials, Vol. 17, pp.111-120, 2010.
[2] S. Abrate, “Localized impact on sandwich structures with laminated facings,” Journal of Applied Mechanics, Vol. 50,pp. 69-82,1997.
[3] S. Abrate, Impact on composite structures, Cambridge University Press, Cambridge, 1998.
[4] G. H. Stickney, F. Abdulhadi, “Flexure theory of multi- layer orthotropic circular sandwich plates,” Journal of Composite Materials, Vol.2, No.2, pp. 200-219, 1968.
[5] O. T. Thomsen, “Modeling of multi- layer sandwich type structures using a high- order plate formulation,” Journal of Sandwich Structures and Materials, Vol.2, No.4, pp.331- 349, 2000.
[6] A. P. Suvorov, G.J. Dvorak, “Enhancement of low velocity impact damage resistance of sandwich plates,” International Journal of Solids and Structures, Vol.42, No.8, pp.2323-2344, 2005.
[7] D. Jiang, D. Shu, “ Local displacement of core in two- layer sandwich composite structures subjected to low velocity impact,” Composite Structures, Vol.71, No.1, pp. 53-60, 2005.
[8] Y. Bahei- El- Din,” Behavior of sandwich plates reinforced with polyurethane/ polyurea interlayers under blast loads,” Journal of Sandwich Structures and Materials, Vol.9, No.3, pp.261-281, 2007.
[9] W. Dongmei, “Cushioning properties of multi- layer corrugated sandwich structures,” Journal of Sandwich Structures and Materials, Vol.11, No.1, pp. 57-66, 2009.
[10] A. G. Mamalis, K. N. Spentzas, N. G. Pantelelis,” A new hybrid concept for sandwich structures, “composite structures, Vol. 83, No.4, pp. 335-340, 2008.
[11] ASTM D1621/94, Standard test method for compressive properties of rigid cellular plastics.