Three-dimensional (3D) printing is a potential rapid prototyping process that may replace traditional manufacturing processes to fabricate lightweight cellular structures with superior energy absorption performance. In the present work, continuous fiber reinforced composite honeycomb structures (CFRCHSs) with excellent shape memory properties were manufactured through a fused filament fabrication (FFF) technology, and their out-of-plane/in-plane compression behaviors and energy absorption characteristics were experimentally investigated. The results reveal that the failure process of the 3D printed CFRCHSs under in-plane loading is that the honeycomb cells collapse layer by layer along the loading direction，accompanied by the formation of a localized band. The crashworthiness analysis indicates that the 3D printed CFRCHSs outperform several competitive cellular topologies in the compression strength and specific energy absorption. A simplified analytical model for the in-plane compression strength of CFRCHSs was derived, and good agreement between measurements and predictions was observed. Additionally, the shape recovery tests demonstrate that the 3D printed CFRCHSs possess the potential as key elements of lightweight intelligent systems and adjustable energy absorbing devices.

三维（3D）打印是一种潜在的快速原型制作工艺，可以代替传统的制造工艺来制造具有卓越能量吸收性能的轻型蜂窝结构。在本工作中，通过熔融长丝制造（FFF）技术制造了具有优异形状记忆性能的连续纤维增强复合蜂窝结构（CFRCHSs），并通过实验对它们的面/面内压缩行为和能量吸收特性进行了实验。调查。结果表明：3D打印CFRCHSs在面内载荷作用下的破坏过程是蜂窝单元沿载荷方向逐层塌陷，并伴有局部化带的形成。耐撞性分析表明，3D打印的CFRCHS在抗压强度和比能量吸收方面优于几种竞争的蜂窝拓扑。得出了CFRCHSs面内抗压强度的简化分析模型，并观察到了测量值与预测值之间的良好一致性。此外，形状恢复测试表明3D打印CFRCHS具有作为轻型智能系统和可调式能量吸收设备的关键元素的潜力。