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Reliability assessment of pultruded FRP reinforcements with embedded fiber optic sensors

机译：带嵌入式光纤传感器的拉挤FRP增强材料的可靠性评估

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摘要

Fiber optic strain sensors are successfully embedded in glass and carbon fiber reinforced polymer (GFRP and CFRP) reinforcements during pultrusion. The specific application is the use of the smart composite reinforcements for strain monitoring of innovative civil engineering structures. A comprehensive reliability assessment of the pultruded smart FRP rods with embedded sensors is performed, encompassing mechanical tests at room temperature as well as under conditions of low and high temperatures. In these tests, the strain output from the embedded fiber optic sensors was in good agreement with the output from surface mounted extensiometers. The fatigue and short-terms creep behavior of the smart composite rods is also examined. Finally, the one-term performance of the smart composites under sustained loads in alkaline environments simulating conditions encountered in concrete structures is assessed. The experiments conducted showed that the strain from the embedded fiber optic sensors conformed well with the corresponding output from the extensiometers or foi gages.
机译：在拉挤成型过程中，光纤应变传感器已成功嵌入玻璃和碳纤维增强聚合物（GFRP和CFRP）增强材料中。具体应用是将智能复合材料增强材料用于创新的土木工程结构的应变监测。对带有嵌入式传感器的拉挤式智能FRP棒进行了全面的可靠性评估，包括在室温以及在低温和高温条件下的机械测试。在这些测试中，嵌入式光纤传感器的应变输出与表面安装引伸计的输出非常吻合。还检查了智能复合材料棒的疲劳和短期蠕变行为。最后，评估了智能复合材料在碱性环境中持续载荷下模拟混凝土结构遇到的条件的短期性能。进行的实验表明，嵌入式光纤传感器产生的应变与引伸计或薄片的相应输出非常吻合。

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