Li Shuai, Qin Jiankun, Wang Bing, Zheng Tengteng, Hu Yingcheng
Key Laboratory of Bio-based Material Science and Technology of Ministry of Education of China, College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China.
Science and Technology on Advanced Composites in Special Environments Key Laboratory, Harbin Institute of Technology, Harbin 150001, China.
Polymers (Basel). 2019 Jan 21;11(1):186. doi: 10.3390/polym11010186.
This paper designed and manufactured photosensitive resin-based 2-D lattice structures with different types of variable cross-section cores by stereolithography 3D printing technology (SLA 3DP). An analytical model was employed to predict the structural compressive response and failure types. A theoretical calculation was performed to obtain the most efficient material utilization of the 2-D lattice core. A flatwise compressive experiment was performed to verify the theoretical conclusions. A comparison of theoretical and experimental results showed good agreement for structural compressive response. Results from the analytical model and experiments showed that when the 2-D lattice core was designed so that R/r = 1.167 (R and r represent the core radius at the ends and in the middle), the material utilization of the 2-D lattice core improved by 13.227%, 19.068%, and 22.143% when n = 1, n = 2, and n = 3 (n represents the highest power of the core cross-section function).
本文采用立体光刻3D打印技术（SLA 3DP）设计并制造了具有不同类型可变横截面芯的基于光敏树脂的二维晶格结构。采用解析模型预测结构的压缩响应和失效类型。进行了理论计算以获得二维晶格芯的最有效材料利用率。进行了平面压缩实验以验证理论结论。理论结果与实验结果的比较表明，结构压缩响应具有良好的一致性。解析模型和实验结果表明，当二维晶格芯设计为R/r = 1.167（R和r分别表示端部和中间的芯半径）时，当n = 1、n = 2和n = 3（n表示芯横截面函数的最高次幂）时，二维晶格芯的材料利用率分别提高了13.227%、19.068%和22.143%。
