Quasi-static three-point bending characteristics of CFRP twelve right angle thin-walled beams
Carbon fiber reinforced polymer(CFRP)has good formability,which makes it possible to form thin-walled beams with multiple right angle sections.The thin-walled beam with multiple right angle section can provide higher de-formation resistance when bearing force and large deformation compared with rectangular section,and can obtain higher specific energy absorption with reasonable design,so it has the application prospect in the bending safety component of automobile.In this paper,the quasi-static bending characteristics of a typical thin-walled beam with twelve right angle section are studied by experiment and finite element analysis.In quasi-static three-point bending test,the bearing and failure characteristics of twelve right angle thin-wall beams with plain woven under two loading directions were com-pared.Then the corresponding finite element model was established,and the error is less than 5%compared with the ex-perimental results.The effects of aspect ratio and ply number on the bending characteristics of two sections were further studied by finite element model.The results show that loading on concave can get higher peak load and specific energy absorption than loading on flat,but the failure displacement is smaller.And the influence trend of section characteristic on the crashworthiness of thin-walled beams in the two loading directions is different.The finite element model and con-clusion obtained can be used to evaluate and confirm the design scheme of bending safety components of automobile body.
CFRPmulti right angle thin-walled beamquasi-static three-point bending testbending characteristicfi-nite element analysis
万方数据
维普
