Detection of Unbonds in Honeycomb Sandwich Structure Using Lock-in Thermography

被引：1
|
作者：
Liu, Hui [1 ]
Liu, Junyan [1 ]
Wang, Yang [1 ]
Li, Huijuan [2 ]
机构：
[1] Harbin Inst Technol, Sch Mechatron Engn, Harbin 150001, Heilongjiang, Peoples R China
[2] China Aeropolytechnol Estab, Beijing 100859, Peoples R China
来源：
MANUFACTURING SCIENCE AND ENGINEERING, PTS 1-5 | 2010年 / 97-101卷
关键词：
nondestructive testing; infrared thermography; lock-in thermography; detecting unbond;
D O I：
10.4028/www.scientific.net/AMR.97-101.4363
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Lock-in thermography (LT), that is active infrared testing technology, mainly includes optical lock-in thermography (OLT) and ultrasound lock-in thermography (ULT). LT can be used to detect unbonds between honeycomb core and face sheet of sandwich structures. However, modulation frequency is an important influencing factor. In this paper, the principles of LT are represented, in experimental detections of simulated unbonds in honeycomb sandwich structures with Al-face sheet and CFRP-face sheet using OLT and ULT, detectability of OLT and ULT is compared and analyzed, effect of modulation frequency is researched and the optimal frequencies are obtained.
引用
收藏
页码：4363 / +
页数：2
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