3D打印形状记忆智能剪纸结构  

3D Printing Shape Memory Smart Kirigami Structure

作　　者：刘志鹏 韩宾[1] 李芸瑜 张琦[1] LIU Zhi-peng;HAN Bin;LI Yun-yu;ZHANG Qi(School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学机械工程学院,西安710049

出　　处：《精密成形工程》2023年第11期39-45,共7页Journal of Netshape Forming Engineering

基　　金：国家重点研发计划(2022YFB4603103,2022YFB4601804)。

摘　　要：目的探究不同切口及不同打印角度形状记忆剪纸结构的拉伸力学性能及形状记忆恢复性能,获得具有较好变形能力和形状记忆恢复能力的智能化剪纸结构。方法使用FDM打印不同角度的剪纸结构样件,并利用激光切割机获得具有方形切口和圆形切口的样件。对打印角度为0°/90°、±45°的方形切口和圆形切口样件进行常温拉伸实验。为探究温度的影响,进行高温缓慢拉伸实验和高温快速拉伸实验;对比方形切口件和圆形切口件在不同初始应变下的形状记忆恢复能力。结果在常温下,打印角度为0°/90°的方形切口样件的拉伸距离为1.75mm,圆形切口样件的拉伸距离为2.50mm;±45°打印角度的方形切口样件的拉伸距离为3.25mm,圆形切口样件的拉伸距离为3.00mm。在高温下,材料进入高弹态,2种切口样件在200%拉伸应变下均未断裂;提高拉伸速率后,方形切口样件的拉伸应变为243.8%,圆形切口样件的拉伸应变为337.5%。结论将打印角度从0°/90°改为±45°后,方形切口和圆形切口剪纸结构的变形能力均增强。相比于方形切口,圆形切口剪纸结构具有更好的变形能力。高温下剪纸结构的变形能力大大增强;圆形切口剪纸结构样件的形状记忆恢复能力强于方形切口样件的。The work aims to obtain smart kirigami structure with large deformation capability and good shape memory re-covery capability by exploring tensile mechanical properties and shape memory recovery properties of shape memory kirigami structure with different incisions and printing angles.Samples of kirigami structure with different angles were printed by FDM and processed by a laser cutting machine to obtain samples with square and circle incisions.The square incision and circle inci-sion samples with printing angles of 0°/90°,±45°were subject to tensile tests at normal temperature.In order to investigate the effect of temperature,slow tensile tests and fast tensile tests at high temperature were carried out.And the shape memory recov-ery abilities of the square incision and circle incision samples were compared with those of the square incision and circle inci-sion samples under different initial strains.At normal temperature,the tensile distance of the square incision and circle incision samples with 0°/90°printing angle was 1.75 mm and 2.50 mm respectively;and the tensile distance of the square incision and circle incision samples with±45°printing angle was 3.25 mm and 3.00 mm respectively.The material entered into the high elastic state at high temperature,and the two kinds of incision did not fracture at 200%tensile strain;After increasing the tensile rate,the tensile strain was 243.8%for the square-incision samples and 337.5%for the circle-incision samples.After changing the printing angle from 0°/90°to±45°,the deformation capacity of both square incision and circle incision kirigami structure in-creases.The circle incision kirigami structure has greater deformation capacity than the square-incision ones.The deformation capacity of the kirigami structure is greatly enhanced at high temperature;and the shape memory recovery of the circle incision kirigami structure samples is stronger than that of the square incision samples.

关 键 词：3D打印 形状记忆 剪纸结构 切口形状 结构设计 

分 类 号：TG139.6[一般工业技术—材料科学与工程]