基于三种单元构型的感知结构功能特性研究

Research on Functional Characteristics of Perceptual Structures Based on Three-unit Configuration

通过熔融沉积成型(Fused Deposition Modeling,FDM)的3D打印技术,制备了晶格结构,在其结构元素表面粘附复合导电材料后,制备了具有感知功能的3D晶格结构(lattice structure sensor,LSS).基于3种单元构型,对不同晶格结构LSS的力学性能与压阻特性展开研究,根据导电复合材料中的导电渗流现象,探究在小范围应变与大变形应变的情况下,不同结构、不同复合材料的LSS压阻特性的规律.结合实验的压缩应力平台数据,找到最适合的晶格结构与LSS复合材料质量分数值,为实现感知结构的变形监测功能提供了可靠的依据.采用先生成3D结构再复合导电复合材料的方法形成功能3D结构,具有结构可控且机械性能良好的优势.其感知结构可用于物体压缩应力的检测,同时也可作为优质缓冲或阻尼材料,有效的吸收振动和能量,因此该研究成果具有较为广阔的应用前景.

Using fused deposition modeling(FDM)3D printing technology,a lattice structure was created.After adhering composite conductive materials to the surface of its structural elements,the 3D lattice structure with sensing capability(LSS)was fabricated.Based on three-unit configurations,a study was conducted to investigate the mechanical properties and piezoresistive characteristics of different lattice structures in LSS.Utilizing the conductive percolation phenomenon in conductive composites,this study explored the patterns of piezoresistive behavior in LSS with varying structures and composites under both small and large strain conditions.Key factors such as stress caused by structural deformation and self-con-tact between lattice surfaces were identified,leading to the observed three-stage trend in the change of e-lectrical resistance response.By analyzing the experimental data from compression tests,the optimal lat-tice structure and composite mass fraction for LSS were determined,providing a reliable basis for deforma-tion monitoring in perceptual structures.The approach of creating a 3D structure and then incorporating conductive composites offers benefits such as structural controllability and good mechanical performance.The sensing structure can detect compressive stress in objects and serve as a high-quality buffering or damping material that effectively absorbs vibration and energy.This research demonstrates promising ap-plications in various fields.