ANALYTICAL INVESTIGATION OF BUCKLING BEHAVIOR OF HONEYCOMBS SANDWICH COMBINED PLATE STRUCTURE

The applications of honeycomb structure plate are very important, since its structure have high strength in addition to the low weight. Therefore, these structures are used in the multi-important application, where, more its application is applied to buckling load in addition to other loads. Thus, it was necessary to highlight the buckling behavior of its structure. There, in this research, a suggested analytical solution to evaluate the critical buckling load of honeycomb sandwich plate structure combined from honeycomb part and upper and lower sheet plate parts. Then, the included results evaluated the mechanical properties of honeycomb part by analytical investigation and buckling load of sandwich plate structure with various parameters effect by the analytical and numerical investigation. The analytical work included the evaluation of the buckling load of a simply supported plate by driving the general equation of buckling the orthotropic plate with buckling load in an x-direction. Also, the results of simply supported honeycombs plate structure were evaluated by the numerical investigation, by using finite element method, ANSYS program Ver. 15, for various honeycombs core size effect. Therefore, a compare between the results were evaluated analytically and numerically of buckling load are presented to show the agreement between the two techniques were used. Where, the comparison of the analytical and numerical results showed a good agreement of results with a maximum error about (2.24%). Finally, the results showed that the buckling load is modified by increasing the honeycomb core size.