نوع مقاله : مکانیک جامدات
نویسندگان
دانشکده مهندسی مکانیک، دانشگاه گیلان، رشت، ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Nowadays, the use of sandwich panels has increased due to their low weight and desirable load absorption properties. These structures may be subjected to various loading. Therefore, designing a structure with minimal displacement under various loadings can have many positive effects. In this study, a two-point simultaneous symmetrical impulsive loading was applied to a sandwich panel with an auxetic honeycomb core topology and compared with a similar model with a square core topology. Due to the high cost of conducting experimental tests, in this study, the investigations were carried out numerically using the finite element software LS-DYNA. After designing the sandwich panel and verifying it with the data available in the literature, amounts of 0.5, 1 and 2 kg of selected charge were applied at one and two points (2×0.25, 2×0.5 and 2×1 kg) at a distance of 10 cm from the sandwich panel with the mentioned topologies and their displacements were evaluated. In the next step, to investigate the effect of the distance between the explosive charges on the displacement of the sandwich panel, this distance was considered to be 8, 10 and 12 cm and the displacement of the sandwich panels with the auxetic and square core topologies under the mentioned loading was investigated. According to the studies conducted, the sandwich panel with an auxetic core showed better performance than the square core in all cases and the displacement of its front and rear faces decreased between 1.6% and 45.3% under different loadings.
کلیدواژهها [English]
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