Investigating combined effects between dynamic mechanical loads and corrosion on epoxy coated steel using distributed fiber optic sensors
Investigating combined effects between dynamic mechanical loads and corrosion on epoxy coated steel using distributed fiber optic sensors
复制标题
DOI：
10.1117/12.2665241
复制
发表时间：
2023-06
期刊：
影响因子：
--
通讯作者：
Luyang Xu;Shuomang Shi;Xingyu Wang;Fei Yan;Ying Huang
中科院分区：
文献类型：
--
作者：
Luyang Xu;Shuomang Shi;Xingyu Wang;Fei Yan;Ying Huang
每年，全球因腐蚀造成的损失估计为2.5万亿美元。腐蚀不仅给结构带来经济负担，而且当腐蚀结构在各种荷载条件下工作时，还可能导致结构的脆性破坏，对结构的可靠性和使用安全构成潜在威胁。虽然有相当多的研究调查了外部载荷和结构钢腐蚀的综合影响，目前的许多研究结果应力和腐蚀之间的协同作用是相反的。在这项研究中，动态机械载荷和腐蚀的环氧涂层钢的综合影响进行了研究，使用分布式光纤传感器的基础上光频域反射。实验研究使用蛇形排列的分布式光纤应变传感器嵌入在环氧树脂与三种不同的情况下，包括冲击载荷，腐蚀，和组合的冲击载荷腐蚀试验。试验结果表明，分布式光纤传感器可以通过测量引起的应变变化来定位和检测腐蚀过程路径。组合的冲击载荷腐蚀条件下，显着加速腐蚀进程所造成的机械载荷，表明环氧涂层钢的动态机械载荷和腐蚀之间的显着相互作用。
Each year, the global cost that is accounted to corrosion was estimated at $2.5 trillion. Corrosion not only imposes an economic burden, when corroded structures are under various loading conditions, it may also lead to structurally brittle failure, posing a potential threat to structural reliability and service safety. Although considerable studies investigated the combined effect of external loads and structural steel corrosion, many of the current findings on synergetic interaction between stress and corrosion are contrary. In this study, the combined effects of dynamic mechanical loads and corrosion on epoxy coated steel are investigated using the distributed fiber optic sensors based on optical frequency domain reflectometry. Experimental studies were performed using the serpentine-arranged distributed fiber optic strain sensors embedded inside the epoxy with three different scenarios including the impact loading-only, corrosion-only, and combined impact loading-corrosion tests. Test results demonstrated that the distributed fiber optic sensors can locate and detect the corrosion processing paths by measuring the induced strain changes. The combined impact loading-corrosion condition showed significantly accelerated corrosion progression caused by mechanical loads, indicating the significant interaction between dynamic mechanical loading and corrosion on epoxy coated steel.