Quantitative test of delamination defects in CFRP with surface interference by laser thermography

被引：3

作者：

Wang, Zhi ^{[1
]}

Pei, Cuixiang ^{[1
]}

Zhang, Zhenyu ^{[1
]}

Chen, Zhenmao ^{[1
]}

机构：

[1] Xian Fiaotong Univ, State Key Lab Strength & Vibrat Mech Struct, Shaanxi Engn Res Ctr NDT & Struct Integr Evaluat, Xian 710049, Shaanxi, Peoples R China

来源：

INFRARED PHYSICS & TECHNOLOGY | 2024年 / 136卷

关键词：

Internal defects of CFRP; Long pulse laser thermography; Depth quantitative analysis; Surface interference; Three-dimensional imaging;

D O I：

10.1016/j.infrared.2023.105046

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Remote onsite inspection and quantitative evaluation of internal delamination defects in carbon fiber reinforced polymer (CFRP) structures is of great significance in practical engineering applications. In this paper, a new method for quantitative test and 3D imaging of internal delamination defects in CFRP with surface interference by long pulse laser thermography is developed. The variation of surface temperature field in a CFRP plate with both defect and surface interference irradiated by a uniform laser source was analyzed by simulation and experiment. Image processing of the collected laser thermography image sequence was carried out to obtain the size and shape of the possible defects. Meanwhile, a method with using the peak time of the temperature difference curve was developed to precisely evaluate the defect depth and eliminate the surface interference. The information was then combined to achieve 3D visualization imaging of the actual defects.

引用

页数：9