Abstract：Using fused deposition modeling (FDM) 3D printing technology, the 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, the study was conducted to investigate both the mechanical properties and piezoresistive characteristics of different lattice structures in LSS. Utilizing the conductive percolation phenomenon in conductive composites, this study research on the patterns of piezoresistive behavior in LSS with varying structures and composites under both small and large strain conditions. The stress caused by structural deformation and the self-contact that occurs between lattice surfaces are two key factors. These factors lead to the observed three-stage trend in the change of electrical resistance response. By analyzing the experimental data from compression stress tests, the optimal lattice structure and composite mass fraction for the LSS were determined. This provides a reliable basis for realizing deformation monitoring capabilities in perceptual structures The approach of creating a 3D structure and then incorporating conductive composites offers advantages such as structural controllability and good mechanical performance. The sensing structure can be used for detecting compressive stress in objects, while also serving as a high-quality buffering or damping material that effectively absorbs vibration and energy. Therefore, this research has broad application prospects.
2024, Vol. 45 
