Abstract:

On the basis of previous studies, a new structural model was built to study compressive properties of three-dimensional hollow sandwich composites (3D composites) by using the finite element software ANSYS Workbench. The distribution of stress & strain on the fibers, resin and the 3D composites was discussed under compressive loads of 2 mm displacement by using the model. The results show that the maximum value of stress occured between the overlap of piles, where the 3D composites damaged easily. The minimum value of stress occured on the up and down face-sheet, where the 3D composites damaged difficultly. The main loads were supported by fibers and the minor loads were supported by resin. The main failure mode of the 3D composites are resin fracture when the 3D composites suffered compressive loads.

Key words: three-dimensional hollow sandwich composite, ANSYS workbench, compressive property, stress, strain, failure mode