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首页> 外文期刊>Journal of Composite Materials >Health monitoring technique for composite materials utilizing embedded thermal fiber optic sensors
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Health monitoring technique for composite materials utilizing embedded thermal fiber optic sensors

机译:利用嵌入式热光纤传感器的复合材料健康监测技术

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摘要

A thermal health monitoring technique is investigated based on thermography that uses optical fiber thermal sensors to detect damage within a laminated graphite epoxy composite specimen. Composite samples manufactured for testing have fiber optic sensors embedded between the layers while thermocouples are attached to the exteriors for verification. Teflon inserts are used to simulate delaminations and the sensitivity range of the embedded sensors is determined. A numerical model is developed to confirm the experimental findings and establish optimum sensor placement. Results indicate that this technique can detect down to a 20-mm delamination, possibly smaller. In addition, the sensors can typically locate a delamination up to 17 mm away. The purpose of this research is to advance standard thermography techniques for damage detection by utilizing fiber optic sensor technologies.
机译:基于热成像技术研究了一种热健康监测技术,该技术使用光纤热传感器检测层压石墨环氧复合材料样品中的损坏。为进行测试而制造的复合样品在各层之间嵌入了光纤传感器,而热电偶则连接到外部以进行验证。铁氟龙插件用于模拟分层并确定嵌入式传感器的灵敏度范围。建立数值模型以确认实验结果并建立最佳传感器位置。结果表明,该技术可以检测到20毫米的分层,甚至可能更小。此外,传感器通常可以定位最远17毫米的分层。这项研究的目的是通过利用光纤传感器技术来改进用于损坏检测的标准热成像技术。

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