导电高聚物可作为应变或应力传感器制成可穿戴器件，亦可用作神经假体或再生器件，用于健康监测和运动传感。在环境介质和循环载荷共同作用下，材料的微结构将发生损伤演化，由此引起导电性能变化，导致器件测量结果产生较大偏差甚至产生错误的测量数据。本项目将研究腐蚀疲劳作用下材料微损伤机理和应变传感行为，以力学活化作用为出发点，开展腐蚀疲劳实验，研究微损伤成核、微裂纹扩展等行为；测定损伤对导电网络的破坏及对电阻率的影响；考虑介质和循环载荷对损伤的耦合驱动作用，对腐蚀疲劳的应力松弛损伤和疲劳损伤进行理论分析，进而揭示腐蚀疲劳作用下微损伤机理，阐明影响力学性能和导电性的因素。在此基础上，建立损伤演化方程和计及腐蚀疲劳损伤的压阻效应模型，探索损伤对应变传感行为的影响规律。本项目的研究可以深化对腐蚀疲劳作用下导电高聚物微损伤机理和力-电特性的认识，为导电高聚物器件研发提供理论支撑，具有重要的理论意义和应用价值。

Conductive polymers can be made into wearable devices as strain or stress sensors, as well as neural prostheses or regenerative devices for health monitoring and motion sensing. Under the combined action of environmental medium and cyclic load, damage evolution of the microstructure will occur, which will lead to the change of the electrical conductivity. As a result, the measurement results of devices will deviate greatly or even be wrong measurement data. This project will investigate the mechanism of micro damage and strain sensing behavior of materials under the action of corrosion fatigue. Based on the mechanical activation, corrosion fatigue experiments will be carried out to study micro-damage nucleation, micro-crack propagation and other failure behaviors. The damage to conductive network and its effect on resistivity will be measured by experimental methods. Considering the coupling effect of medium and cyclic load on damage, the stress relaxation damage and fatigue damage of corrosion fatigue are analyzed theoretically, and then the micro-damage mechanism under corrosion fatigue is revealed, and the factors affecting mechanical properties and electrical conductivity are clarified accordingly. On this basis, damage evolution equation and piezoresistive effect model considering corrosion fatigue damage were established to explore the influence of damage on strain sensing behavior. The research of this project can deepen the understanding of the micro-damage mechanism and mechanical-electrical characteristics of conductive polymer under the action of corrosion fatigue. It will provide theoretical support for the research and development of conductive polymer devices. This research is of important theoretical significance and application value.