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首页> 外文期刊>Optics and Lasers in Engineering >On The Feasibility Of Optical Fibre Sensors For Strain Monitoring In Thermoplastic Composites Under Fatigue Loading Conditions
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On The Feasibility Of Optical Fibre Sensors For Strain Monitoring In Thermoplastic Composites Under Fatigue Loading Conditions

机译：疲劳载荷条件下用于热塑性复合材料应变监测的光纤传感器的可行性研究

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摘要

This study investigates the possibility of using optical fibres with Bragg gratings for measurements in thermoplastic composites under fatigue loading conditions. Two setups are considered: (ⅰ) the fibre is embedded in the composite and (ⅱ) the grating is bonded externally. Detailed information is given on the principle of optical fibre measurements and the data acquisition for both setups. To verify the strain derived from the optical fibre, the strain is compared with extensometer measurements. A special design of the blades of the extensometer is presented, since the standard blades suffer from a loss of grip on the surface of the specimen. The material used for this study was a carbon fibre-reinforced polyphenylene sulphide. It can be concluded for both setups that the optical fibre survives over half a million loading cycles, without de-bonding of the fibre. The advantage of the external fibre over the embedded one is that it can be mounted after manufacturing of the plate, but it has a higher risk of being damaged during working conditions of the component.
机译：这项研究调查了在疲劳载荷条件下使用带有布拉格光栅的光纤在热塑性复合材料中进行测量的可能性。考虑了两种设置：（ⅰ）光纤嵌入复合材料中，（ⅱ）光栅从外部粘合。给出了有关光纤测量原理和两种设置的数据采集的详细信息。为了验证源自光纤的应变，将该应变与引伸计测量结果进行比较。引伸计的叶片具有特殊设计，因为标准叶片会失去试样表面的附着力。用于这项研究的材料是碳纤维增强的聚苯硫醚。可以得出结论，对于这两种设置，光纤都可以承受超过一百万次的加载循环，而不会剥离光纤。外部光纤相对于嵌入式光纤的优势在于，可以在制造板后安装该光纤，但是在组件的工作条件下其损坏的风险更高。

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