Processed data for: A global assessment of barely visible impact damage for CFRP sub-components with FBG-based sensors

Processed data for "A global assessment of barely visible impact damage for CFRP sub-components with FBG-based sensors".

Barely visible impact damage (BVID) on carbon fibre reinforced polymer (CFRP) aerospace components can create interlaminar defects that may deteriorate during operation with potential failure as a result. Especially damage-prone regions such as the feet of a stiffener must therefore be inspected for BVIDs frequently, which is an effort that increases downtimes and operational costs. The potential of optical fibre sensors as part of a permanently installed structural health monitoring network is well-known. Individual FBG-based strain sensors have shown their capability to detect BVIDs. In this work we introduce a global damage index (GDI) as a figure of merit for the combined response of 60 FBG sensors mounted on several aerospace-grade CFRP flat stiffened panels. We first obtain a detection threshold for the GDI and then demonstrate its use for BVID detection. The proposed methodology is the first of its kind for the representation of the health of a component in a single parameter.

The data set includes the damage indicators as calculated from the spectra, and global damage indices (GDI) as calculated from the damage indicators for every impact.

针对“基于光纤布拉格光栅传感器的CFRP子组件轻微可见冲击损伤的全球评估”数据集的预处理数据。碳纤维增强聚合物（CFRP）航空航天组件上的轻微可见冲击损伤（BVID）可能产生层间缺陷，这些缺陷在运行过程中可能会恶化，从而引发潜在的故障。因此，对于如加强筋脚部等易于受损的区域，必须频繁检查BVID，这一过程增加了停机时间和运营成本。作为永久性安装的结构健康监测网络的一部分，光纤传感器的潜力早已为人所知。基于光纤布拉格光栅（FBG）的应变传感器已显示出检测BVID的能力。在本研究中，我们引入了一个全局损伤指数（GDI）作为60个FBG传感器在多个航空航天级CFRP平板加强筋上的综合响应的评估标准。我们首先获得了GDI的检测阈值，然后展示了其在BVID检测中的应用。所提出的方法是首次用于表示单个参数中组件健康状况的代表方法。该数据集包括从光谱中计算出的损伤指标，以及针对每个冲击从损伤指标计算出的全局损伤指数（GDI）。