| 摘要: |
| 为了分析3D打印碳纤维增强聚醚醚酮（C-PEEK）复合材料的力学行为，探索最优工艺参数进行仿生结构设计，研究了碳纤维含量、打印喷头温度、平台温度、切片层厚度、打印速度、填充度、填充直线角度、填充形状、热处理温度及保温时间等多个工艺参数下，3D打印C-PEEK的力学性能演化规律。结果表明：含
10 wt.%碳纤维的C-PEEK拉伸性能最好，并且最佳的3D打印参数为：打印喷头温度440 ℃、平台温度130 ℃、切片厚度0.2 mm、填充度100%、90°直线填充、打印速度40 mm/s、保温腔90 ℃。此外，根据最佳3D打印参数设计兼具蜂窝多孔和Bouligand旋转夹层的仿生结构，开展抗压强度测试并进行压溃行为分析，发现当层间旋角为30°时对应的蜂窝-Bouligand仿生结构的抗压强度可达24.1 MPa，且具有优异的非灾难性断裂特征。 |
| 关键词: 3D打印 聚醚醚酮复合材料 仿生结构 力学行为 压溃失效 |
| 基金项目: |
|
| Biomimetic Structure Design and Mechanical Behavior of 3D Printed Carbon Fiber-Polyetheretherketone |
|
Shao Jianfeng1, Chao Bingxuan1, Ma Siqi2, Li Quanhong2, Wang Meirong3, Song Xiaoguo3, He Peigang*2
|
|
1. Avic Changhe Aircraft Industry (Group) Corporation Ltd., Jingdezhen 333000;2. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080;3. National Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin, 150001
|
| Abstract: |
| To analyze the mechanical behavior of 3D printed carbon fiber reinforced polyetheretherketone composite (C-PEEK) materials and explore the optimal process parameters for designing biomimetic structures, the evolution of mechanical properties of 3D printed C-PEEK material was investigated under various process parameters including carbon fiber content, printing nozzle temperature, platform temperature, slicing layer thickness, printing speed, infill density, infill linear angle, infill pattern, as well as heat treatment temperature and duration. The results showed that C-PEEK with 10 wt.% carbon fiber exhibited the best tensile performance, and the optimal 3D printing parameters were determined as follows: printing nozzle temperature of 440 ℃, platform temperature of 130 ℃, slicing thickness of 0.2 mm, infill density of 100%, infill linear angle of 90°, printing speed of 40 mm/s, and heat chamber temperature of 90 ℃. Additionally, based on the optimal 3D printing parameters, a biomimetic structure combining honeycomb porous and Bouligand spiral layering was designed. Compression strength tests were conducted on the structure, and the compressive strength of the honeycomb-Bouligand biomimetic structure with an interlayer rotation angle of 30° reached 24.1 MPa, exhibiting excellent non-catastrophic fracture characteristics. |
| Key words: 3D printing polyetheretherketone composite materials biomimetic structures mechanical behavior crushing failure |
