当前位置: X-MOL 学术Mater. Des. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Programmable morphing composites with embedded continuous fibers by 4D printing
Materials & Design ( IF 8.4 ) Pub Date : 2018-10-01 , DOI: 10.1016/j.matdes.2018.06.027
Qingrui Wang , Xiaoyong Tian , Lan Huang , Dichen Li , Andrei V. Malakhov , Alexander N. Polilov

Abstract Controllable morphing is still a challenge in the field of 4D printing. In this paper, a novel 4D printing technology of composites with embedded continuous fibers is introduced, and the bilayer prepared by this technology can realize programmable deformation with a high deformation accuracy. The deformation of the composite structure is caused by the difference of coefficients of thermal expansion (CTEs) between continuous fibers and flexible matrix. The angle between the intersecting fibers determines the size of the principal curvature, while the bisector of the angle of the fibers determines the direction of the principal curvature. Utilizing this rule, deformation of arbitrary deployable surface can be realized by designing the fiber trajectories. The high control accuracy of fiber orientation leads to a high deformation accuracy of 4D printed structure. The error between the theoretical value and the experimental value of the conical surface curvature is not more than 6%. In addition, the smart composite structure with the ability of temperature response and self-actuated deforming composite structure have also been prepared by this 4D printing process.

中文翻译:

通过 4D 打印嵌入连续纤维的可编程变形复合材料

摘要 可控变形仍然是4D打印领域的一个挑战。本文介绍了一种新型嵌入连续纤维复合材料的4D打印技术,该技术制备的双层可实现高变形精度的可编程变形。复合结构的变形是由连续纤维和柔性基体之间的热膨胀系数(CTE)的差异引起的。交叉纤维之间的角度决定了主曲率的大小,而纤维角度的平分线决定了主曲率的方向。利用这个规则,可以通过设计纤维轨迹来实现任意可展开表面的变形。纤维取向的高控制精度导致4D打印结构的变形精度高。锥面曲率理论值与实验值误差不大于6%。此外,该4D打印工艺还制备了具有温度响应能力和自驱动变形复合结构的智能复合结构。
更新日期:2018-10-01
down
wechat
bug