Abstract:A new structural model was built to study tensile properties of three鄄dimensional hollow sandwich
composites (3D composites) by using the finite element software Workbench. The distribution of stress & strain on the
fibers, resin and the 3D composites was discussed under tensile loads of 1 mm displacement by using the model. The
results show that the maximum value of stress occured between the overlap of X鄄shaped piles, where the 3D compos鄄
ites damaged easily. The minimum value of stress occured on the up and down face鄄sheet, where the 3D composites
damaged difficulty. The main loads were supported by reinforced fibers and the minor loads were supported by matrix
resin. The main failure mode of the 3D composites are resin fracture when the 3D composites suffered tensile displace鄄
ment loads at 1 mm.
