Inspired by the sensory organs of spiders, crack-based strain sensors are flexible sensors fabricated by depositing a thin layer of metal onto a stretchable polymer. However, to date, most studies on crack-based sensors have considered only linear strain, even when bending is considered, which do not analyze how sensor resistance depends on complex strains (linear, convex, and concave). For each given type of strain, this study examined how the distance between cracks depends on the crack direction. This study also analyzed how the crack-generation mechanism depends on the relation between film-bending axis and crack direction. Thus, a device was proposed herein to test the crack-based sensors and demonstrate how this device can be used to measure the bending direction.

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弯曲应变和裂纹方向对基于裂纹的应变传感器的影响

受蜘蛛的感觉器官启发，基于裂纹的应变传感器是通过将金属薄层沉积到可拉伸聚合物上而制成的柔性传感器。但是，迄今为止，大多数基于裂纹的传感器研究都只考虑了线性应变，即使考虑了弯曲也没有考虑传感器电阻如何取决于复杂应变（线性，凸形和凹形）。对于每种给定的应变类型，本研究检查了裂纹之间的距离如何取决于裂纹方向。该研究还分析了裂纹产生机理如何取决于膜弯曲轴与裂纹方向之间的关系。因此，本文提出了一种设备来测试基于裂纹的传感器并演示该设备如何可以用于测量弯曲方向。