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Failure monitoring of E-glass/vinylester composites using fiber grating acoustic sensor

机译:使用纤维光栅声传感器监测电子玻璃/乙烯基酯复合材料的失效

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This paper reports an application of an optical fiber sensor in a continuous and in situ failure testing of an E-glass/vinylester top hat stiffener (THS). The sensor head was constructed from a compact phase-shifted fiber Bragg grating (PS-FBG). The narrow transmission channel of the PS-FBG is highly sensitive to small perturbation, hence suitable to be used in acoustic emission (AE) assessment technique. The progressive failure of THS was tested under transverse loading to experimentally simulate the actual loading in practice. Our experimental tests have demonstrated, in good agreement with the commercial piezoelectric sensors, that the important failures information of the THS was successfully recorded by the simple intensity-type PS-FBG sensor.
机译:本文报道了光纤传感器在电子玻璃/乙烯基酯高帽加强板(THS)的连续和原位失效测试中的应用。传感器头由紧凑型相移光纤布拉格光栅(PS-FBG)制成。 PS-FBG的窄传输通道对小扰动高度敏感,因此适合用于声发射(AE)评估技术。在横向载荷下测试了THS的渐进破坏,以在实践中通过实验模拟实际载荷。我们的实验测试表明,与商用压电传感器非常吻合,THS的重要故障信息已通过简单的强度型PS-FBG传感器成功记录。

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