Eddy Current Sensor Arrays for Stress and Damage Mapping
Lead Research Organisation:
Newcastle University
Department Name: Electrical, Electronic & Computer Eng
Abstract
While eddy current methods are widely used in industry for crack location, very little work has been undertaken in the UK to exploit their potential as a cheap and portable way of sensing stress. Due to the complex nature of electromagnetic interactions with matter, eddy current signals are difficult to interpret and it is currently not possible to unambiguously separate their sensitivities to stress, microstructure and defects. Meeting this challenge requires a multidisciplinary approach; bringing together instrumentation, signal processing with materials science. The 2 teams are well placed to develop the necessary hardware and to begin to establish approximate relationships between the eddy current signature, residual stress, defects, surface geometry and microstructure. This understanding will help us to develop low cost, non destructive eddy current methods for residual stress, active defect detection, and provide guidance for structural integrity engineers regarding the assessment of defects under residual stress loading. To this end we will develop a set of reference samples with quantified levels of stress and damage upon which the techniques will be validated and refined. We will develop and evaluate stress/microstructure/defect imaging from near the surface up to 20mm depth using novel pulsed eddy current sensor arrays along with advanced signal analysis, particularly up to 200 micrometer depth stress distribution of near surface. Huddersfield will design and develop the pulsed eddy current sensors while Manchester has the necessary materials knowledge and complementary stress and damage measurement techniques to validate and evaluate the success of different sensor designs and signal analysis procedures. While the development of a general unambiguous tool for simultaneous stress and damage measurement is some way off, we hope to scope the range of sensitivity of portable prototype eddy current capability to provide cheap, non destructive information about stress and damage levels in specific cases.
Publications
Liang T
(2016)
Low energy impact damage detection in CFRP using eddy current pulsed thermography
in Composite Structures
Liu J
(2014)
Investigation of thermal imaging sampling frequency for eddy current pulsed thermography
in NDT & E International
Morozov M
(2013)
Elastic and plastic strain effects on eddy current response of aluminium alloys
in Nondestructive Testing and Evaluation
Morozov M
(2010)
Comparison Of Pec And Sfec Nde Techniques
in Nondestructive Testing and Evaluation
Morozov M
(2010)
Noncontact evaluation of the dependency of electrical conductivity on stress for various Al alloys as a function of plastic deformation and annealing
in Journal of Applied Physics
Morozov M
(2010)
The pulsed eddy current response to applied loading of various aluminium alloys
in NDT & E International
Qiu F
(2017)
Characterization of applied tensile stress using domain wall dynamic behavior of grain-oriented electrical steel
in Journal of Magnetism and Magnetic Materials
Ricci M
(2017)
Evaluation of the lift-off robustness of eddy current imaging techniques
in NDT & E International
Tang C
(2017)
Smart Compressed Sensing for Online Evaluation of CFRP Structure Integrity
in IEEE Transactions on Industrial Electronics
Tian G
(2011)
COMPLEMENTARY ELECTROMAGNETIC NON-DESTRUCTIVE EVALUATION
Description | Eddy current sensing arrays have been applied for defect and stress mapping. Natural RCF cracks can be detected by eddy current pulsed thermography. The resolution and location are impressive. The detectability and limitation have been identified. Further research is proposed. |
Exploitation Route | Eddy Current pulsed thermography has been explored for better sensing and imaging. New RFID sensor network is investigated. More multiphysics sensing and monitoring should be investigated |
Sectors | Aerospace, Defence and Marine,Construction,Electronics,Energy,Environment,Manufacturing, including Industrial Biotechology,Transport,Other |
Description | One new KTP with GE PII have been awarded. Pulsed eddy current arrays will be replace by eddy current pulsed thermography for further investigated. Several new PhD students and international scholars have been attracted for the studies. |
Sector | Aerospace, Defence and Marine,Energy,Environment,Manufacturing, including Industrial Biotechology,Transport,Other |
Impact Types | Societal,Economic |
Description | Chinese Scholarship Council |
Amount | £10,000 (GBP) |
Funding ID | Yunze He |
Organisation | University of Leeds |
Department | China Scholarship Council |
Sector | Academic/University |
Country | United Kingdom |
Start | 02/2011 |
End | 02/2012 |
Description | Chinese Scholarship Council |
Amount | £100,000 (GBP) |
Funding ID | Yunze He |
Organisation | University of Leeds |
Department | China Scholarship Council |
Sector | Academic/University |
Country | United Kingdom |
Start | 03/2011 |
End | 02/2015 |
Description | Commission of the European Communities |
Amount | £225,000 (GBP) |
Funding ID | HEMOW 269202 |
Organisation | European Commission |
Sector | Public |
Country | European Union (EU) |
Start | 04/2011 |
End | 03/2015 |
Description | Commission of the European Communities |
Amount | £425,000 (GBP) |
Funding ID | CONHEALTH 2576737 |
Organisation | European Commission |
Sector | Public |
Country | European Union (EU) |
Start | 04/2012 |
End | 04/2016 |
Description | EMAT based Pipeline integrity |
Amount | £62,000 (GBP) |
Organisation | Innovate UK |
Sector | Public |
Country | United Kingdom |
Start | 09/2016 |
End | 03/2017 |
Description | Game changer Proposal and Poster |
Amount | £5,000 (GBP) |
Organisation | National Nuclear Laboratory |
Sector | Public |
Country | United Kingdom |
Start | 10/2016 |
End | 03/2017 |
Description | NDTonAIR: Training Network in Non-Destructive Testing and Structural Health Monitoring of Aircraft structures |
Amount | £189,034 (GBP) |
Funding ID | 722134 |
Organisation | European Commission |
Sector | Public |
Country | European Union (EU) |
Start | 05/2017 |
End | 04/2020 |
Description | Pulsed Eddy Current for Pipeline Integrity |
Amount | £60,000 (GBP) |
Organisation | Radix 2 Design |
Sector | Private |
Country | United Kingdom |
Start | 09/2016 |
End | 06/2017 |
Description | Royal Society |
Amount | £50,000 (GBP) |
Organisation | Royal Academy of Engineering |
Sector | Charity/Non Profit |
Country | United Kingdom |
Start | 03/2011 |
End | 02/2012 |
Description | Rolls-Royce plc |
Organisation | Rolls Royce Group Plc |
Country | United Kingdom |
Sector | Private |
Start Year | 2008 |