Damage Mechanism of a Sandwich Material Tested Under Static and Cyclic Loadings in a Three Points Bending Experiment

(*) Corresponding author

Authors' affiliations

DOI's assignment:
the author of the article can submit here a request for assignment of a DOI number to this resource!
Cost of the service: euros 10,00 (for a DOI)


This paper presents the results of an experimental investigation on the damage mechanism of a sandwich material, tested under static and cyclic loading conditions in a three points bending test. Four loading levels were considered for different number of loading cycles and rates of loading. The samples were tested using a Universal machine (Zwick Roelle) allowing a loading capacity of 5 kN, monitored by a computer. The main results obtained show that for the three loading rates investigated, increasing the cyclic loading level causes a decrease in the deformation energy of the sandwich material. This observation was confirmed by the evolution of the damage mechanism related to the number of cycles applied to the sample. When analyzed by means of the optical microscope, the damage and failure mechanisms were found to be linked to the delaminating of the Core-thickness and failure of the fibers
Copyright © 2014 Praise Worthy Prize - All rights reserved.


Sandwich Material; Cyclic Loading; 3 Points Bending Test; Damage Mechanism

Full Text:



M. Kharoubi, L. Fatmi, R. Berbaoui, S. Benmedakhène, A. El Mahi, Study of the damage by acoustic emission of two laminate composites subjected to various levels of loading in three points bending, Mechanika, 2007. Nr.5(67).

L. Fatmi, M. Kharoubi & all, Analyse de l’endommagement par émission acoustique d’un stratifié composite soumis à différents niveaux de chargement , PP. 823-831, JNC15, Marseille, Technopôle de château-Gombert, 6 au 8 Juin 2007, France.

L. Bounouas, S. Benmedakhene, A. Laksimi, F. Neumann, A. Imad, and Z. Azari, Experimental analysis of the influence of structural parameters on the behavior of glass-fiber reinforced polypropylene composites’’, Strength of Materials, Vol. 33, No.1, 2001.

S. Allaoui, Etude d’un comportement de structure sandwich carton nodule, Thèse de Doctorat, Université de Compiègne, 2005.

B. Mouhmid, A. Imad, N. Benseddiq, S. Benmedakhène, A. Maazouz, A study of the mechanical behaviour of a glass fibre reinforced polyamide 6,6 : Experimental investigation, Polymer Testing, Vol. 25 (2006) 544 –552.

J. M. Berthelot, L. Fatmi, Statistical investigation of the fracture behaviour of inhomogeneous materials in tension and three-point bending, Engineering Fracture Mechanics, Vol. 71 (2004) 1535 –1556.

G. Demelio, K. Genoveve, C. Pappalettere, An experimental investigation of static and fatigue behaviour of sandwich composite panels joined by fasteners, Composites Part B 32 (2001) 299-308.

A. Corigliano, E. Rizzi, E. Papa, Experimental characterization and numerical simulations of a syntactic-foam/glass-fibre composite sandwich, composites Science and Technology 60 (2000) 2169-2180.

K. Jongman, S. R. Swanson, Design of sandwich structures for concentrated loading’’, Composites Structures 52 (2001) 365-373.

T.M. McCormack, R. Miller, O. Kesler, L.J. Gibson, Failure of sandwich beams with metallic foam cores, International journal of solids and structures 38 (2001) 4901-4920.


  • There are currently no refbacks.

Please send any question about this web site to info@praiseworthyprize.com
Copyright © 2005-2024 Praise Worthy Prize