Laser ultrasonic array system for real-time cure monitoring of polymer-matrix composites
Laser ultrasonic array system for real-time cure monitoring of polymer-matrix composites
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DOI：
10.1177/0021998302036015245
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发表时间：
2002-01-01
影响因子：
2.9
通讯作者：
Krishnaswamy, S
中科院分区：
文献类型：
--
作者：
Fomitchov, PA;Kim, YK;Krishnaswamy, S
提出了一种用于石墨-环氧复合材料固化实时监测的激光超声系统。该系统包含一组光纤激光超声源，一个嵌入式Sagnac光纤超声传感器，并与树脂传递成型机集成。光学开关的使用允许在复合部件的几个位置产生超声波。激光源产生的超声波被传输到复合材料中，并由嵌入式传感器检测。固化状态是由测量超声波速度推断出来的。介绍了复合材料试样制造过程中超声测量的结果。本文所述的激光超声固化监测系统具有在高温高压环境下工作的能力；足够小，可以放入模具中；并测量了复合件内多个位置的固化状态。
A laser ultrasonic system for real-time cure monitoring of a graphite-epoxy composite is proposed. The system contains an array of fiberized laser ultrasonic sources, and an embedded fiber optic Sagnac ultrasonic sensor, and is integrated with a Resin Transfer Molding machine. The use of an optical switch allows ultrasonic generation at several locations of the composite part. Ultrasound generated by the laser source is transmitted into the composite and is detected by the embedded sensor. The cure state is inferred from measurements of ultrasonic velocity. The results of ultrasonic measurements during manufacturing of a composite specimen are presented. The laser ultrasonic cure monitoring system described in this paper has the ability to operate in a high temperature and high pressure environment; is small enough to be incorporated into molds; and measures the cure state at several locations within the composite part.