材料科学
复合材料
蜂巢
复合数
刚度
形状记忆合金
蜂窝结构
3d打印
执行机构
变形(气象学)
灾难性故障
计算机科学
医学
生物医学工程
人工智能
作者
Yunyong Cheng,Junjie Li,Xiaoping Qian,Stephan Rudykh
标识
DOI:10.1016/j.compstruct.2021.113974
摘要
This paper reports the failure and recovery mechanisms of 3D-printed lightweight honeycomb composites. Through this experimental study, we demonstrate the enhanced mechanical performance of 3D-printed composite structures and their ability for shape recovery under heat excitation. The remarkable mechanical performance of the reinforced honeycombs draws from the combination of the structural geometry and the tailored material composition. The results show that the addition of continuous fibers enables the honeycomb structure to avoid catastrophic failure even at high levels of deformation, which allows the shape memory effect to be activated and nearly 87% percent of the initial structural shape to be recovered. Moreover, the reinforced honeycombs exhibit enhanced properties: the specific energy absorption and specific stiffness of the reinforced honeycombs are up to 2 times greater than those of the conventional honeycombs. These enhanced mechanical properties combined with the controllable shape recovery of the 3D-printed structures can be used in the design of novel energy absorbing and protective material systems, biomedical devices, and actuators.
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