Detection of Crack Initiation and Growth Using Fiber Bragg Grating Sensors Embedded into Metal Structures through Ultrasonic Additive Manufacturing
Detection of Crack Initiation and Growth Using Fiber Bragg Grating Sensors Embedded into Metal Structures through Ultrasonic Additive Manufacturing
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DOI：
10.3390/s19224917
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发表时间：
2019-11-01
期刊：
影响因子：
3.9
通讯作者：
Dapino, Marcelo J.
中科院分区：
文献类型：
--
作者：
Chilelli, Sean K.;Schomer, John J.;Dapino, Marcelo J.
结构健康监测（SHM）是一个快速发展的领域，专注于在灾难性故障发生之前检测复杂系统中的损伤。先进的传感器技术对于在恶劣或偏远环境、生命关键系统、大规模生产车辆、机器人系统等应用中充分利用SHM是必要的。光纤布拉格光栅（FBG）传感器由于其抗电磁噪声、多路复用能力和精确的实时操作而在现场健康监测中具有吸引力。超声增材制造（UAM）已被证明用于具有嵌入式FBG传感器的3D结构的固态制造。在本文中，UAM嵌入FBG传感器的研究重点是SHM应用。FBG传感器嵌入在铝基体3毫米的起始位点，以解决最小的裂纹长度为0.286 +/- 0.033毫米，并跟踪裂纹生长，直到接近故障。精确的裂纹检测也证明了从FBG放置在6毫米和9毫米的裂纹萌生的网站。常规丙烯酸酯涂层FBG传感器一旦嵌入UAM工艺，即可在高达300摄氏度的温度下重复工作。
Structural health monitoring (SHM) is a rapidly growing field focused on detecting damage in complex systems before catastrophic failure occurs. Advanced sensor technologies are necessary to fully harness SHM in applications involving harsh or remote environments, life-critical systems, mass-production vehicles, robotic systems, and others. Fiber Bragg Grating (FBG) sensors are attractive for in-situ health monitoring due to their resistance to electromagnetic noise, ability to be multiplexed, and accurate real-time operation. Ultrasonic additive manufacturing (UAM) has been demonstrated for solid-state fabrication of 3D structures with embedded FBG sensors. In this paper, UAM-embedded FBG sensors are investigated with a focus on SHM applications. FBG sensors embedded in an aluminum matrix 3 mm from the initiation site are shown to resolve a minimum crack length of 0.286 +/- 0.033 mm and track crack growth until near failure. Accurate crack detection is also demonstrated from FBGs placed 6 mm and 9 mm from the crack initiation site. Regular acrylate-coated FBG sensors are shown to repeatably work at temperatures up to 300 degrees C once embedded with the UAM process.