3316 Development of solid-air composites by biomimetics superior in load dispersion ability under dynamic loading condition
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Nature has developed many novel solutions that are often considered to be optimal. Extracting these design solutions from nature is known as biomimetics. Cancellous bone contains trabecular bone (solid) and marrow (fluid), and plays an important role for load transfer of the knee joint. The objective of this research is mimicking the solid-liquid composition of the cancellous bone and developing the material that has the excellent load dispersion ability. In the previous research, the solid-liquid composition of the cancellous bone has been modeled as solid-air composite that was made with Al honeycomb and silicon film. The hydrostatic pressure in cells affected the load dispersion characteristic under static compression. In this study, to investigate the influence of the compression speed, impact tests were carried out. We investigated the influence of directions of holes to cell walls, cell wall thickness, hole diameter and the number of holes on the load dispersion ability. solid-air composites displayed good load dispersion ability under dynamic load.
