用于碳纤维增强塑料的中红外脉冲激光超声检测

Mid-infrared pulsed laser ultrasonic testing for carbon fiber reinforced plastics.

作者信息

Kusano Masahiro, Hatano Hideki, Watanabe Makoto, Takekawa Shunji, Yamawaki Hisashi, Oguchi Kanae, Enoki Manabu

机构信息

Research Center of Structural Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.

Research Center for Functional Materials, National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan.

出版信息

Ultrasonics. 2018 Mar;84:310-318. doi: 10.1016/j.ultras.2017.11.015. Epub 2017 Nov 24.

DOI:10.1016/j.ultras.2017.11.015

PMID:29197737

Abstract

Laser ultrasonic testing (LUT) can realize contactless and instantaneous non-destructive testing, but its signal-to-noise ratio must be improved in order to measure carbon fiber reinforced plastics (CFRPs). We have developed a mid-infrared (mid-IR) laser source optimal for generating ultrasonic waves in CFRPs by using a wavelength conversion device based on an optical parametric oscillator. This paper reports a comparison of the ultrasonic generation behavior between the mid-IR laser and the Nd:YAG laser. The mid-IR laser generated a significantly larger ultrasonic amplitude in CFRP laminates than a conventional Nd:YAG laser. In addition, our study revealed that the surface epoxy matrix of CFRPs plays an important role in laser ultrasonic generation.

摘要

激光超声检测（LUT）可以实现非接触式和即时无损检测，但为了检测碳纤维增强塑料（CFRP），其信噪比必须得到提高。我们通过使用基于光学参量振荡器的波长转换装置，开发了一种最适合在CFRP中产生超声波的中红外（mid-IR）激光源。本文报道了中红外激光与Nd:YAG激光在超声波产生行为方面的比较。中红外激光在CFRP层压板中产生的超声振幅明显大于传统的Nd:YAG激光。此外，我们的研究表明，CFRP的表面环氧基质在激光超声产生中起着重要作用。