Non-contact defect imaging of carbon fiber composites using laser excited acoustic shearography

被引：3

作者：

Tham, Zi Wen ^{[1
]}

Sampath, Santhakumar ^{[1
]}

Chen, Yi Fan ^{[1
]}

Mutiargo, Bisma ^{[2
]}

Zhang, Lei ^{[1
]}

机构：

[1] ASTAR, Inst Mat Res & Engn IMRE, 2 Fusionopolis Way,Innovis 08-03, Singapore 138634, Singapore

[2] ASTAR, Adv Remfg & Technol Ctr ARTC, 3 Cleantech Loop,01-01 CleanTech Two, Singapore 637143, Singapore

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2024年 / 257卷

基金：

新加坡国家研究基金会;

关键词：

Carbon fiber composites; Acoustic shearography; Laser ultrasonics; Non-destructive testing; IMPACT DAMAGE;

D O I：

10.1016/j.compscitech.2024.110796

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

The performance of carbon fiber reinforced polymer (CFRP) composites is significantly affected by the presence of subsurface defects, which originate from manufacturing processes or during operations. Although many nondestructive testing (NDT) methods have been employed to inspect CFRP materials and structures, the existing techniques are often time-consuming and sometimes require contact measurement. This paper presents a noncontact and rapid inspection method utilizing laser-excited acoustic shearography to detect subsurface defects in CFRP composites. In this method, a pulsed nanosecond laser is used to generate ultrasonic waves through thermoacoustic effect, and a shearography sensor is used to image the full-field wave-defect interactions. It is found that the proposed method can efficiently image various subsurface defect sizes in a non-contact way. The identified defects were validated through comparison with X-ray computed tomography (XCT).

引用

页数：6