Abstract:The observation of scanning electron microscope shows that the cortical layer of antler is a kind of nature bioceramic composite consisting of mineral-collagen fibers and collagen-protein matrix. The observation also shows that there are many micro-holes in the cortical layer and that the strengthening mineral-collagen fibers circuitously round these holes which compose a kind of the circuitously-rounding-hole structure of the mineral-collagen fibers. The analytical models of the composites, respective with the circuitously-rounding-hole and non-circuitously-rounding-hole structures of the fibers are built. The fracture strength of the composite model with the circuitously-rounding-hole structure is analyzed and compared with that of the composite model with the non-circuitously-rounding-hole structure. The analytical result shows that the fracture strength of the composite model with the circuitously-rounding-hole structure is remarkably larger than that of the composite model with the non-circuitously-rounding-hole structure. Based on the results of the experimental observations and model analyses, a kind of biomimetic composite laminate with the circuitously-rounding-hole structure is fabricated with carbon fibers and epoxy resin. The fracture strength of the composite with the circuitously-rounding-hole structure was tested and compared with that of the composite with the non-circuitously-rounding-hole structure. The testing results show that the fracture strength of the composite with the circuitously-rounding-hole structure is remarkably larger than that of the composite with the non-circuitously-rounding-hole structure.