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).

中文翻译：

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γ射线辐射和大应变影响下的光纤应变传感电缆的机械性能。

光纤应变传感电缆广泛用于结构健康监测；但是，尽管监视系统的稳定性能非常重要，但仍未评估恶劣环境对它们的影响。本文分析了（i）不同组成层对构成材料为金属和聚酰胺的应变传感电缆的性能的影响;（ii）辐射对光纤应变传感电缆响应（500 kGyγ射线）的影响），以及（iii）电缆在高轴向应变（高达1％，10,000με）下的性能。在实际应用中，辐射对应变敏感性的影响可以忽略不计，即，系数最大变化4％。还评估了电缆组成的影响：灵敏度差异保持在15％以下，考虑不同电缆组成和结构时的标准变化范围。最后评估了弹塑性行为，突出了电​​缆（尤其是金属零件）的残余应变（施加10,000με后约为1600με）。