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Simulation Analysis of In-Plane Compression on Three-Dimensional Spacer Fabric Composite

A meso-structure model of three-dimensional spacer fabric composite (3D composite) was built by using the finite element software Workbench, and simulation analysis of in-plane compression on the 3D composite was studied according to the model. The results show that the upper and lower face-sheet is the main load-bearing section macroscopically, while the piles are the secondary load-bearing one when the 3D composite is subjected to in-plane compressive load. The fibers play a major role microscopically, while the resin plays a minor one. From part magnifying stress distribution, it can be found that the maximum stress occurs in the warp yarns, interlaced with weft yarns, when the 3D composite is subjected to in-plane compressive loads in warp direction, and fracture appearance is parallel. Meanwhile, the maximum stress occurs in the weft yarns, interlaced with binder warp yarns, when the 3D composite is subjected to in-plane compressive loads in weft direction, and fracture appearance is random. From strain distribution of each component, it can be seen that the failure mode is the interfacial de-bonding between the fibers and resin when the 3D composite is subjected to in-plane compressive loads.