700/QY8911复合材料圆管轴压下能量吸收研究

Quasi-static axial compression tests were performed on composite circular tubes fabricated by thermosetting prepreg of T700/QY8911 to study their energy absorption characteristics. The main energy absorption parameters, such as peak load, mean crushing load and specific energy absorption, are obtained by experiments. It is found that the energy absorption characteristic and crushing damaged mode depend not only on carbon fiber property, but also on the manufacturing process and trigger mechanism with end weakness on tubes. The trigger mechanism herein could effectively reduce peak load, and make composite tubes crush progressively. A progressive damage finite element model is established and the energy absorption characteristics are obtained by the FE analysis. The computed data agree with experimental results, thus indicates the simulation method is feasible.