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首页> 外文会议>Fiber Optic and Laser Sensors and Applications; Including Distributed and Multiplexed Fiber Optic Sensors VII >Miniature multiplexed fiber-grating-array sensor for the interrogation of localized strain patterns during crack growth studies upon hybrid laminate panels
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Miniature multiplexed fiber-grating-array sensor for the interrogation of localized strain patterns during crack growth studies upon hybrid laminate panels

机译：微型多路复用光纤光栅阵列传感器，用于在混合层压板的裂纹扩展研究过程中询问局部应变模式

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Abstract: As part of a project to optimize hybrid laminates for resistance to fatigue failure, arrays of fiber Bragg gratings are being used to monitor small-scale strain perturbations in composite materials. A remote multiplexed sensing system with 40 remote sensing sties using fiber optic technology, has been developed to monitor the strain field developed across the composite lamina of a hybrid laminate in the vicinity of a fatigue crack. Developed primarily for fatigue-critical aerospace applications, i.e. fuselage and lower wing skins, the hybrid laminates are orthotropic materials having lower density and higher strength than a simple alloy monolith without reinforcement. Fatigue crack growth in hybrid laminates is a complex process that involves a combination of delamination and fiber bridging. The fiber optic system has been applied to the problem of characterizing delamination zone development about a fatigue crack, initiated at a through-thickness fastener hole. !15
机译：摘要：作为优化混合层压板以抵抗疲劳破坏的项目的一部分，光纤布拉格光栅阵列用于监测复合材料中的小范围应变扰动。已开发出一种采用光纤技术的具有40个遥测杆的遥测多路传感系统，以监测在疲劳裂纹附近的混合层压板的复合层上产生的应变场。混合层压板主要为对疲劳要求苛刻的航空航天应用（即机身和下机翼蒙皮）而开发，是正交各向异性的材料，其密度和强度均高于没有加强筋的简单合金整料。混合层压板中的疲劳裂纹扩展是一个复杂的过程，涉及分层和纤维桥接的组合。光纤系统已经应用于表征围绕疲劳裂纹的分层区域发展的问题，该疲劳裂纹始于贯穿厚度的紧固件孔。 ！15

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