Abstract The addition of functionalized graphene nanoplatelets (f-GNPs) into the epoxy resin of glass fiber multiscale composite materials creates an electrically conductive network. This electrical network is highly sensitive to strain induced in the material. For this reason, it is a competitive material to be used in structural health monitoring (SHM). Sensitivity of multiscale composite materials is ∼50 under tensile loads and the behavior under compression loads differs, making possible the detection of different load conditions. Independency of the strain rate is related to the enhanced interface between f-GNPs and the epoxy matrix due to functionalization. Additionally, the electrical behavior is reversible without the loss of efficiency in sensorial properties.

中文翻译：

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用于高灵敏度应变传感器的基于 GNPs 的多尺度复合材料的灵敏度、应变率和可逆性的影响

摘要 将功能化石墨烯纳米片 (f-GNPs) 添加到玻璃纤维多尺度复合材料的环氧树脂中可形成导电网络。该电气网络对材料中感应的应变高度敏感。因此，它是一种用于结构健康监测 (SHM) 的有竞争力的材料。多尺度复合材料在拉伸载荷下的灵敏度为~50，压缩载荷下的行为不同，使得检测不同载荷条件成为可能。由于功能化，应变率的独立性与 f-GNP 和环氧树脂基质之间增强的界面有关。此外，电行为是可逆的，而不会损失感官特性的效率。