布立冈型螺旋纤维仿生复合材料动静态力学行为

The Bouligand structure found in arthropod exoskeletons had been shown to be the key factor to improving their dynamic mechanical properties. It is expected to provide innovative solutions and ideas for high-performance aerospace materials by designing the microstructure of fiber reinforced composites (CFRP) with the help of the concept of structural bionics. In this paper, the dynamic and static mechanical behaviors of Bouligand-type biomimetic materials and quasi-isotropic laminated materials are studied by means of SHPB and mechanical testing machine . The experimental results show that,with the increase of strain rate (≮1 850 s^-1),the toughness of can be improved by at least 17. 4% at a small helical angle,and the energy absorption capacity under quasi-static compression reaches 21. 25 J/ g,which is improved by at least 42. 4% compared with the quasi-isotropic configuration, all of which can be attributed to the plastic strengthening ability of Bouligand configuration specimen. The simulated and test results of drop weight impact further show that the bionic configuration can obtain excellent energy dissipation and impact protection characteristics.