Piccolo Arianna, Delepine-Lesoille Sylvie, Friedrich Etienne, Aziri Shasime, Lecieux Yann, Leduc Dominique
French National Radioactive Waste Management Agency (Andra), 92298 Chatenay-Malabry, France.
Université de Nantes, Laboratoire GeM UMR 6183, 44000 Nantes, France.
Sensors (Basel). 2020 Jan 27;20(3):696. doi: 10.3390/s20030696.
Optical fiber strain sensing cables are widely used in structural health monitoring; however, the impact of a harsh environment on them is not assessed despite the huge importance of the stable performances of the monitoring systems. This paper analyzes (i) the impact of the different constituent layers on the behavior of a strain sensing cable whose constitutive materials are metal and polyamide, (ii) the radiation influence on the optical fiber strain sensing cable response (500 kGy of γ -rays), and (iii) the behavior of the cable under high axial strain (up to 1%, 10,000 μ ε ). Radiation impact on strain sensitivity is negligible for practical application, i.e., the coefficient changes by 4% at the max. The influence of the composition of the cable is also assessed: the sensitivity differences remain under 15%, a standard variation range when different cable compositions and structures are considered. The elasto-plastic behavior is at the end evaluated, highlighting the residual strain (about 1600 μ ε after imposing 10,000 μ ε ) of the cable (especially for metallic parts).
光纤应变传感电缆广泛应用于结构健康监测；然而，尽管监测系统稳定性能至关重要，但恶劣环境对其影响尚未得到评估。本文分析了：（i）不同组成层对由金属和聚酰胺构成的应变传感电缆性能的影响；（ii）辐射（500 kGy的γ射线）对光纤应变传感电缆响应的影响；（iii）电缆在高轴向应变（高达1%，即10,000 με）下的性能。对于实际应用而言，辐射对应变灵敏度的影响可忽略不计，即系数最大变化4%。还评估了电缆组成的影响：当考虑不同的电缆组成和结构时，灵敏度差异保持在15%以下，这是一个标准变化范围。最后评估了弹塑性行为，突出了电缆（特别是金属部件）的残余应变（施加10,000 με后约为1600 με）。
