The study aims to understand the effect of stacking sequence on the impact response and residual flexure characteristics of braided composite tube by combination of low-velocity impact, fracture observation and acoustic emission monitoring. Two stacking sequence configurations of braided tube in terms of [^I60/^O40] and [^I40/^O60] were designed and their low-velocity impact response and damage behavior were examined. Uniform structures namely [^I40/^O40] and [^I60/^O60] were also employed as reference specimens. The quasi-static bending performances of intact and impacted tubes were further compared to evaluate the influence of impact damage on residual performance. The results show that failure mode of impacted tubes strongly depends on braided structure of outer ply, of which large braiding angle(60°) leads to the formation of bottom delamination and degradation of structural integrity. The comparative experiments indicate that [^I60/^O40] tube improves flexure after impact performance with respect to specific energy absorption by 45.98% over [^I40/^O60] counterpart because of absence of bottom delamination. Thus, structure design of braided composite consisting of intra-ply structure and stacking sequence would be an economically feasible method to improve the transverse mechanical performance.

该研究旨在通过低速冲击，断裂观察和声发射监测相结合，了解堆垛顺序对编织复合管冲击响应和残余挠曲特性的影响。设计了[ ^I 60 / ^O 40]和[ ^I 40 / ^O 60]编织管的两种堆叠顺序配置，并检查了它们的低速冲击响应和破坏行为。统一结构，即[ ^I 40 / ^O 40]和[ ^I 60 / ^O60]也用作参考样本。进一步比较了完整管和受冲击管的准静态弯曲性能，以评估冲击损伤对残余性能的影响。结果表明，冲击管的破坏方式在很大程度上取决于外层的编织结构，编织角度大（60°）会导致底部分层的形成和结构完整性的降低。对比实验表明，[ ^I 60 / ^O 40]管在冲击性能后的比吸收能量比[ ^I 40 / ^O ]提高了45.98％。60]，因为没有底部分层。因此，由层间结构和堆叠顺序组成的编织复合材料的结构设计将是提高横向力学性能的经济可行的方法。