In situ spatial strain monitoring of a single-lap joint using inkjet-printed carbon nanotube embedded thin films

被引：17
|
作者：
Zhao, Yingjun [1 ,2 ]
Schagerl, Martin [1 ,2 ]
Gschossmann, Sandra [2 ]
Kralovec, Christoph [1 ,2 ]
机构：
[1] Johannes Kepler Univ Linz, Christian Doppler Lab Struct Strength Control Lig, Alternberger Str 69, A-4040 Linz, Austria
[2] Johannes Kepler Univ Linz, Inst Struct Lightweight Design, Linz, Austria
来源：
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL | 2019年 / 18卷 / 5-6期
关键词：
Adhesive bonding; single-lap joint; carbon nanotubes; electrical impedance tomography; finite element analysis; ELECTRICAL-IMPEDANCE TOMOGRAPHY; ADHESIVELY BONDED JOINTS; DAMAGE;
D O I：
10.1177/1475921718805963
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Adhesive bonds are particularly favored by lightweight structures due to their weight efficiency and insulating property regarding contact corrosion. However, it is challenging to interrogate directly over the bonding area due to its sandwiched structure. In this study, an inkjet-printed carbon nanotube (CNT) strain distribution sensing film is embedded at the interface between an adherend and the adhesive in a single-lap joint configuration to monitor the spatial strain distribution over the bonding area. The conductivity distribution reconstructed by an algorithm of electrical impedance tomography (EIT) results in similar trend to the correlated conductivity distribution numerically calculated from a three-dimensional (3D) finite element model. Moreover, the EIT result of a defect-embedded testing specimen shows a different conductivity distribution compared to the healthy specimen, indicating the existence of the debonding region.
引用
收藏
页码：1479 / 1490
页数：12
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