Next Article in Journal
Sensing Properties of Pd-Loaded Co3O4 Film for a ppb-Level NO Gas Sensor
Next Article in Special Issue
Bridge Displacement Monitoring Method Based on Laser Projection-Sensing Technology
Previous Article in Journal
Nonlinear Optimization-Based Device-Free Localization with Outlier Link Rejection
Previous Article in Special Issue
A Noncontact FMCW Radar Sensor for Displacement Measurement in Structural Health Monitoring
Article Menu

Export Article

Open AccessArticle
Sensors 2015, 15(4), 8088-8108; doi:10.3390/s150408088

Detection of Steel Fatigue Cracks with Strain Sensing Sheets Based on Large Area Electronics

Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ 08544, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Thomas Schumacher
Received: 30 January 2015 / Revised: 24 March 2015 / Accepted: 30 March 2015 / Published: 7 April 2015

Abstract

Reliable early-stage damage detection requires continuous monitoring over large areas of structure, and with sensors of high spatial resolution. Technologies based on Large Area Electronics (LAE) can enable direct sensing and can be scaled to the level required for Structural Health Monitoring (SHM) of civil structures and infrastructure. Sensing sheets based on LAE contain dense arrangements of thin-film strain sensors, associated electronics and various control circuits deposited and integrated on a flexible polyimide substrate that can cover large areas of structures. This paper presents the development stage of a prototype strain sensing sheet based on LAE for crack detection and localization. Two types of sensing-sheet arrangements with size 6 × 6 inch (152 × 152 mm) were designed and manufactured, one with a very dense arrangement of sensors and the other with a less dense arrangement of sensors. The sensing sheets were bonded to steel plates, which had a notch on the boundary, so the fatigue cracks could be generated under cyclic loading. The sensors within the sensing sheet that were close to the notch tip successfully detected the initialization of fatigue crack and localized the damage on the plate. The sensors that were away from the crack successfully detected the propagation of fatigue cracks based on the time history of the measured strain. The results of the tests have validated the general principles of the proposed sensing sheets for crack detection and identified advantages and challenges of the two tested designs. View Full-Text
Keywords: Structural Health Monitoring (SHM); strain sensing sheet; Large Area Electronics (LAE); direct sensing; fatigue crack; damage detection and localization Structural Health Monitoring (SHM); strain sensing sheet; Large Area Electronics (LAE); direct sensing; fatigue crack; damage detection and localization
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Yao, Y.; Glisic, B. Detection of Steel Fatigue Cracks with Strain Sensing Sheets Based on Large Area Electronics. Sensors 2015, 15, 8088-8108.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top