利用原位电阻抗断层扫描在架构化晶格中进行全场损伤监测
Full-Field Damage Monitoring in Architected Lattices Using In situ Electrical Impedance Tomography
AI总结：
本文利用原位电阻抗断层扫描技术实现对3D打印多功能晶格复合材料中损伤演变的实时全场监测，展示了其在架构化材料中的应用潜力。
摘要：
电阻抗断层扫描（EIT）能够实现非侵入性的、空间连续的内部导电率分布重建，提供超越传统点测量的全场传感能力。本文报道了首次在可调架构化晶格材料框架内实现EIT的原位应用，使在广阔的晶格设计空间内系统性探索成为可能，同时实现了对损伤演变的实时监测，包括早期阶段和裂纹前事件，在3D打印多功能晶格复合材料中。晶格通过基于Voronoi的分支-主干-分支图案设计，受二维墙纸对称性启发，并使用碳纳米管增强的光固化树脂制造，纳米级填料分散性通过场发射扫描电子显微镜确认。十六个电极沿晶格外围分布，使在准静态拉伸加载过程中进行EIT测量。使用相邻和跨电流注入方案重建的导电率图谱能够高时间分辨率地解析连续的连杆断裂，局部导电率损失定量对应于断裂部位，包括远离电极的区域。架构可调性使EIT成像灵敏度能够系统性地控制早期损伤，而断裂时明显的电阻断续性进一步证实了空间局部化；全局端到端电阻测量补充了宏观应力应变响应。这些结果共同确立了原位EIT作为一种可扩展的、全场传感方法，用于架构化多功能材料，为自主、智能材料和数据丰富的材料状态提供了实验验证的路径，可为结构、生物医学和能源相关应用的数字孪生框架提供信息。
英文摘要：
Electrical impedance tomography (EIT) enables non-invasive, spatially continuous reconstruction of internal conductivity distributions, providing full field sensing beyond conventional point measurements. Here, we report the first in situ implementation of EIT within a tunable architected lattice materials framework, enabling systematic exploration across a broad lattice design space while achieving real time monitoring of damage evolution, including early stage, prefracture events, in 3D printed multifunctional lattice composites. Lattices are designed via Voronoi based branch trunk branch motifs inspired by 2D wallpaper symmetries and fabricated using CNT infused photocurable resins, with nanoscale filler dispersion confirmed by field emission scanning electron microscopy. Sixteen electrodes distributed along the lattice periphery enable EIT measurements during quasi static tensile loading. Conductivity maps reconstructed using adjacent and across current injection schemes resolve sequential ligament fracture with high temporal resolution, with localised conductivity loss quantitatively coinciding with fracture sites, including regions remote from electrodes. Architectural tunability allows systematic control of EIT imaging sensitivity to early stage damage, while pronounced resistance discontinuities at failure further corroborate spatial localisation; global end to end resistance measurements complement macroscopic stress strain responses. Collectively, these results establish in situ EIT as a scalable, full field sensing modality for architected multifunctional materials, providing an experimentally validated pathway toward autonomous, intelligent materials and data rich material states that can inform digital twin frameworks for structural, biomedical, and energy related applications.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
