Four-dimensional (4D) printing technology of continuous carbon fiber reinforced shape memory polymer composites is a potential manufacturing process for lightweight and high-strength intelligent composite structures. In this study, a 3D printer with dual feed channels based on the fused deposition modeling (FDM) was designed to fabricate continuous carbon fiber reinforced shape memory poly(lactic acid)-based composites (CFRSMPC). The impact of various printing parameters on the bending strength and flexural modulus of 4D printed CFRSMPC was evaluated by the three-point bending test. Meanwhile, mathematical prediction models of bending strength and modulus based on the existing experimental data were established. The electro-induced shape memory effect of 4D printed CFRSMPC was investigated by the electric heating shape recovery test. The shape recovery rate of the specimens was more than 95%, indicating that the resistance heating method is stable and feasible. The quantitative effect of bending angle and temperature on the resistance of CFRSMPC during the programming and recovery process was further investigated. The results demonstrated that the real-time deformation of the CFRSMPC could be monitored by the resistance measurement method. It can be concluded that the CFRSMPC fabricated using the 4D printing method can serve as potential building blocks for electrically activated and deployable structures.

连续碳纤维增强的形状记忆聚合物复合材料的四维（4D）打印技术是轻量级和高强度智能复合材料结构的潜在制造工艺。在这项研究中，基于熔融沉积建模（FDM）的具有双进料通道的3D打印机被设计为制造连续的碳纤维增强的形状记忆聚乳酸基复合材料（CFRSMPC）。通过三点弯曲试验评估了各种印刷参数对4D打印CFRSMPC的弯曲强度和弯曲模量的影响。同时，基于现有实验数据建立了抗弯强度和模量的数学预测模型。通过电加热形状恢复测试研究了4D打印CFRSMPC的电诱导形状记忆效应。样品的形状恢复率超过95％，表明电阻加热法是稳定可行的。进一步研究了弯曲角度和温度对CFRSMPC电阻在编程和恢复过程中的定量影响。结果表明，通过电阻测量方法可以监测CFRSMPC的实时变形。可以得出结论，使用4D打印方法制造的CFRSMPC可以用作电激活和可展开结构的潜在构造块。结果表明，通过电阻测量方法可以监测CFRSMPC的实时变形。可以得出结论，使用4D打印方法制造的CFRSMPC可以用作电激活和可展开结构的潜在构造块。结果表明，通过电阻测量方法可以监测CFRSMPC的实时变形。可以得出结论，使用4D打印方法制造的CFRSMPC可以用作电激活和可展开结构的潜在构造块。