作者: Haili Zhou , Dongmei Hu , Bohong Gu , Baozhong Sun
DOI: 10.1016/J.COMPSTRUCT.2017.02.025
关键词: Shear (sheet metal) 、 Split-Hopkinson pressure bar 、 Stiffness 、 Composite material 、 Tube (container) 、 Linear density 、 Finite element method 、 Displacement (fluid) 、 Materials science 、 Transverse plane
摘要: Abstract The transverse impact performance of three dimensional (3-D) braided composite tubes has been studied both experimentally and numerically. Three types were manufactured by changing the number braiding layers. test was performed on a modified split Hopkinson pressure bar (SHPB) apparatus under gas pressures. From tests, load, displacement energy absorbed all increase with pressure. layers leads to load absorption, but decrease displacement. specific normalized linear density also increases increment results indicated that more contributed higher stiffness. damage modes matrix crack, fiber breakage shear bands at area impact. finite element method (FEM), stress distribution impacted tube highlighted plus progression during cycles.