Optical fiber sensing of small cracks in isotropic homogeneous materials

Optical fiber sensing of small cracks in isotropic homogeneous materials
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各向同性均质材料中小裂纹的光纤传感

DOI:
10.1016/j.sna.2015.02.017
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发表时间:
2015-04
影响因子:
4.6
通讯作者:
Amjad U
Amjad U
中科院分区:
工程技术3区
文献类型:
--
作者:
Zhao J L;Bao T F;Amjad U

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裂缝和其他损坏的监测是正在进行的研究的一个组成部分。裂缝等损伤会破坏结构的完整性,甚至造成工程事故。因此,及时监测结构裂缝的发展,控制结构的整体破坏程度是至关重要的。在本文中,一种新型的光纤传感器进行了讨论,这种传感器的开发,以监测小裂纹(0和0.8毫米之间的裂纹开口)。首先介绍了传感器的传感原理,然后通过实验研究讨论了尺寸参数对传感器的影响。测试结果表明,该传感器具有良好的初始感知能力和较高的灵敏度。此外,该传感器在监测小裂纹方面非常有效。
Monitoring of cracks and other damages is an integral part of ongoing research. Cracks and other damages may destroy the integrity of structures and even cause engineering accidents. Hence, it is of utmost importance to monitor the development of cracks in structures well in time to restrict the extent of overall damage. In this paper, a novel fiber optic sensor is discussed; this sensor is developed to monitor small cracks (crack openings between 0 and 0.8 mm). The sensing principle of the sensor is first introduced and then the influence of dimensional parameters on the sensor is discussed through experimental investigations. The test results indicate that the sensor has a good initial perception capacity and a high sensitivity. Furthermore, the sensor is very effective in monitoring of small cracks.
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