Experimental and numerical analysis of buckling in grid composite plates

Composite grid structures are a series of bands of attached fibers, widely used in a variety of industries, particularly in manufacture of rockets, satellites and airplanes. Composite grid is the best kind of structures proposed for resistance against axial compressive loads. In this study, buckling characteristics of grid composite plates under axial load have been studied using numerical and experimental methods. In this paper, three parameters of the composite thickness, cells and number of cells is changed three times and the results for different reference samples are compared together. All the specimens were subjected to pure axial loading for the buckling experiment. The boundary condition is simple support and a compressive axial load. Results showed that the buckling load to weight ratio increased by ٨ to 79 percent, relative to the reference case. Experimental and numerical results of this study showed that for pure axial loading, the best grid shape for plates is the triangular grid. The samples have been modeled and analyzed in the Abaqus FEM software. Obtained experimental and numerical results were compared and it was seen that the two methods are in good Consent in the results.

کلیدواژه ها:

grid composite plates ، buckling load ، grid ribs