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摘要
A novel carbon fiber reinforced plastics-aluminum alloy (CFRP/AA6061) hybrid tube with five-cell-roundercorner (C5C) profile was presented in this paper. Different from the available hybrid tubes, the novel structure consisted of a C5C-profile aluminum alloy tube wrapped by CFRP cloths. Numerical simulations and experiments of the C5C hybrid tubes subjected to axial compression were performed. The parameters of modelling CFRP and modelling the interface between CFRP and AA6061 tube were validated. Two multi-objective optimizations aiming to obtain the optimal dimensions of the C5C profile and the optimal angles of the CFRP plies were conducted. The energy absorption and the peak force of the C5C hybrid tube were compared with that of the tubes with common profiles. The effect of wrapping on the energy absorption and the peak force was discussed. The results showed that the novel hybrid tube had excellent energy absorption performance. It could avoid the unstable cracking and early cracking that often occurred to the tubes with common profiles. The specific energy absorption (SEA) of the C5C CFRP/AA6061 tube was 16.7% larger than the SEA sum of the constituent tubes. Wrapping could produce a coupling amplification effect and CFRP/Al hybrid tubular structures manufactured by wrapping were promising materials in light weighting.
- 出版日期2019-2-1
- 单位同济大学
