Abstract
The analysis of stiffness and the identification of rupture mechanisms during and after static tests of sandwich panels and their components have been investigated. The sandwich panels, having cross-ply laminates skins made of glass fibre and epoxy resin were manufactured by vacuum moulding and subjected to three-point bending tests. Two polyvinyl chloride cores of similar type but with differing densities were investigated. The effect of core density and its thickness on the behavior and the damage was highlighted. In terms of stiffness and load at failure, the sandwich structure has better mechanical characteristics compared to its components.
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References
J.-M. Berthelot, Composite Materials. Mechanical Behavior and Structural Analysis, Springer, New York (1999).
G. W. Hunt, L. S. da Silva, and G. M. E. Manzocchi, “Interactive buckling in sandwich structures,” Proc. Roy. Soc. London, A417, 155–177 (1988).
G. W. Hunt and M. A. Wadee, “Localization and mode interaction in sandwich structures,” Proc. Roy. Soc. London, A454, 1197–1216 (1998).
V. Sokolinsky and Y. Frostig, “Nonlinear behavior of sandwich panels with a transversely flexible core,” AIAA J., 37, 1474–1482 (1999).
H. G. Allen, Analysis and Design of Structural Sandwich Panels, Pergamon Press, London (1969).
M. A. Wadee, “Effects of periodic and localized imperfections on struts on nonlinear foundations and compression sandwich panels,” Int. J. Solids Struct., 37, No. 8, 1191–1209 (2000).
T. C. Triantafillou and L. J. Gibson, “Instrumented impact testing of aramide-reinforced composite materials. Instrumented impact testing of plastics and composites materials,” in: ASTM STP 936, Philadelphia (1987), pp. 219–235.
T. C. Triantafillou and L. J. Gibson, “Failure mode maps for foam core sandwich beams,” Mater. Sci. Eng., 95, 37–53 (1987).
M. Somers, T. Weller, and H. Abramovich, “Influence of predetermined delaminations on buckling and post buckling behavior of composite sandwich beams,” Compos. Struct., 17, 295–329 (1991).
M. Somers, T. Weller, and H. Abramovich, “Buckling and postbuckling behavior of delaminated sandwich beams,” Compos. Struct., 21, 211–232 (1992).
Y. Frostig, “Behavior of delaminated sandwich beam with transversely flexible core — high-order theory,” Compos. Struct., 20, 1–16 (1992).
M. A. Wadee and A. Blackmore, “Delamination from localized instabilities in compression sandwich panels,” J. Mech. Phys. Solids, 49, 1281–1299 (2001).
D. Gay, Matériaux Composites, Hermès, Paris (1991).
D. Zenkert, An Introduction to Sandwich Construction, Emas Publishing, UK (1995).
D. Zenkert, The Handbook of Sandwich Construction, Emas Publishing, UK (1997).
D. J. Hall and B. L. Robson, “A review of the design and material evaluation program for GRP/foam sandwich composite Hull of the RAN Minehunter,” Composites, 15, No. 4 (1984).
S.-E. Hellbratt and O. Gullberg, “The development of the GRP-sandwich technique for large marine structures,” in: Proc. 1st Int. Conf. on Sandwich Constructions (Stockholm, 19–21 June) (1989).
G. Caprino, R. Teti, C. Ghini, P. Pagliarani, “Applicazione delle structure sandwich per la relazzazione di fugonture isothermiche autoporitanti,” in: Proc. Conf. on Materiali per il Transporto Algoalimentare (Cesena, 9–12 May) (1990).
R. P. Reichard, “Enhanced shock performance of FRP sandwich structures,” in: Proc. 1st Int. Conf. on Fast Sea Transportation (Trondheim, June 1991) (1991), 1, pp. 399–411.
K.-A. Olsson and A. Lonno, “Test procedures for foam core materials,” in: Proc. 1st Int. Conf. on Sandwich Constructions (Stockholm, 19–21 June) (1989).
K. A. Feinchtinger, “Test methods and performance of structural core materials. I. Static properties,” in: Proc. 4th Annual ASM Int./Eng. Soc. of Detroit, Advancing Composite Conference (Detroit, Sept. 1988) (1988).
D. Zenkert and J. Backlund, “PVC sandwich core materials: Mode I fracture toughness,” Compos. Sci. Technol., 34 (1989).
S. D. Clark, R. A. Shenoi, H. G. Allen, “Modeling the fatigue behavior of sandwich beams under monotonic, 2 step, and block loading regimes,” Compos. Sci. Technol., 59, 471–486 (1999).
L. H. Gibson and M. F. Ashby, Cellular Solid — Structure and Properties, 2nd edition, Cambridge University Press, Cambridge (1997).
A. R. Bezazi, A. El Mahi, J.-M. Berthelot, and B. Bezzazi, “Influence of reinforcement in cross-ply laminates in flexural testing,” in: Proc. Congr. on New Trends in Fatigue and Fracture (April 8–9, 2002) (2002).
A. R. Bezazi, A. El Mahi, J.-M. Berthelot, B. and Bezzazi, “Flexural fatigue behavior of cross-ply laminates: An experimental approach,” Strength Mater., 35, No. 2, 149–161 (2003).
A. R. Bezazi, A. El Mahi, J.-M. Berthelot, and A. Kondratas, “Investigation of cross-ply laminates behavior in three-point bending tests. Part II: Cyclic fatigue tests,” Mater. Sci., 9, No. 1, 128–133 (2003).
É. Lolive, Analyse du Comportement non linéaire de Poutres en Matériaux Sandwiches avec Âme en Mousse, Thèse de Doctorat, Université du Maine (Le Mans, France) (2000).
A. R. Bezazi, A. El Mahi, J.-M. Berthelot, and B. Bezzazi, “Analyse du comportement et de l’endommagement des matériaux composites sandwiches en flexion 3-points,” 16ème Congrès Français de Mécanique (Nice, 1–5 septembre 2003) (2003).
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Translated from Problemy Prochnosti, No. 2, pp. 88–98, March–April, 2007.
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Bezazi, A., El Mahi, A., Berthelot, JM. et al. Experimental analysis of behavior and damage of sandwich composite materials in three-point bending. Part 1. Static tests and stiffness degradation at failure studies. Strength Mater 39, 170–177 (2007). https://doi.org/10.1007/s11223-007-0022-4
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DOI: https://doi.org/10.1007/s11223-007-0022-4