The additive manufacturing (AM) process is used to build three‐dimensional (3D)‐printed components by depositing layers of materials one over another until it completes the building process. There are numerous ways to improve its strength and rigidity of AM processed components. In this research, we discuss an effective method to improve the strength of 3D‐printed component joints by reinforcing carbon fiber (CF) with polylactic acid (PLA) and applying bioinspired interlock sutures. The strength of 3D‐printed components is highly influenced by build parameters such as printing speed, extruder temperature, and layer thickness. In this context, the design of experiment (DOE) was made to ensure the effect of build parameters. The specimens were fabricated according to DOE in order to characterize bending behavior, which was analyzed using special fixture. The bending strength and fracture behavior of specimen for three different interlock joints were studied. The analytical technique of particle swarm optimization was adopted to predict the optimum printing parameters to improve the bending strength of the 3D‐printed components. The result shows that CF‐reinforced PLA with spline interlock suture increases the bending strength of the 3D‐printed specimen when compared to pure PLA.

中文翻译：

---

通过增强碳纤维和采用生物启发的互锁缝线来提高增材制造部件的强度

增材制造（AM）流程用于构建三维（3D）打印的组件，方法是将一层材料一层一层地沉积，直到完成构建过程为止。有许多方法可以提高AM处理组件的强度和刚度。在这项研究中，我们讨论了一种通过用聚乳酸（PLA）增强碳纤维（CF）并应用生物启发的互锁缝线来提高3D打印组件接头强度的有效方法。3D打印组件的强度在很大程度上受构建参数的影响，例如打印速度，挤出机温度和层厚。在这种情况下，进行实验设计（DOE）以确保构建参数的效果。根据DOE制作样品，以表征弯曲行为，使用特殊夹具进行了分析。研究了三种不同互锁接头的抗弯强度和断裂行为。采用粒子群优化分析技术预测最佳印刷参数，以提高3D打印组件的弯曲强度。结果表明，与纯PLA相比，带花键联锁缝线的CF增强PLA可以提高3D打印样品的抗弯强度。