{"title":"Flexural Performance of the Sandwich Structures Having Aluminum Foam Core with Different Thicknesses","authors":"Emre Kara, Ahmet F. Geylan, Kadir Ko\u00e7, \u015eura Karakuzu, Metehan Demir, Halil Aykul","volume":101,"journal":"International Journal of Civil and Environmental Engineering","pagesStart":596,"pagesEnd":602,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10001415","abstract":"The structures obtained with the use of sandwich\r\ntechnologies combine low weight with high energy absorbing\r\ncapacity and load carrying capacity. Hence, there is a growing and\r\nmarkedly interest in the use of sandwiches with aluminum foam core\r\nbecause of very good properties such as flexural rigidity and energy\r\nabsorption capability. In the current investigation, the static threepoint\r\nbending tests were carried out on the sandwiches with\r\naluminum foam core and glass fiber reinforced polymer (GFRP)\r\nskins at different values of support span distances aiming the analyses\r\nof their flexural performance. The influence of the core thickness and\r\nthe GFRP skin type was reported in terms of peak load and energy\r\nabsorption capacity. For this purpose, the skins with two different\r\ntypes of fabrics which have same thickness value and the aluminum\r\nfoam core with two different thicknesses were bonded with a\r\ncommercial polyurethane based flexible adhesive in order to combine\r\nthe composite sandwich panels. The main results of the bending tests\r\nare: force-displacement curves, peak force values, absorbed energy,\r\ncollapse mechanisms and the effect of the support span length and\r\ncore thickness. The results of the experimental study showed that the\r\nsandwich with the skins made of S-Glass Woven fabrics and with the\r\nthicker foam core presented higher mechanical values such as load\r\ncarrying and energy absorption capacities. The increment of the\r\nsupport span distance generated the decrease of the mechanical\r\nvalues for each type of panels, as expected, because of the inverse\r\nproportion between the force and span length. The most common\r\nfailure types of the sandwiches are debonding of the lower skin and\r\nthe core shear. The obtained results have particular importance for\r\napplications that require lightweight structures with a high capacity\r\nof energy dissipation, such as the transport industry (automotive,\r\naerospace, shipbuilding and marine industry), where the problems of\r\ncollision and crash have increased in the last years.","references":"[1] S. Belouettar, A. Abbadi, Z. Azari, R. Belouettar, P. 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