Influence of electric charge on numerical simulation of eddy current testing signals due to a conductive crack when using multi-media element
Source abstract
Abstract
The multi-media finite element (MME) treating the discontinuity of the conductivity within the element was proposed by authors for fast simulation of the eddy current testing (ECT) signals of a conductive crack such as a stress corrosion crack. However, in the cases when eddy current consists of a large component perpendicular to the crack surface, the simulation accuracy is sometimes not very good because of the appearance of electric charge on the crack surface. In this paper, the influences of the surface electric charge on the implementation of the numerical method and on the simulation of the ECT signals were analyzed theoretically. A series of numerical analyses were designed to investigate the scope of feasibility of the MME. The simulation accuracy of the MME for different probe orientations and crack shapes was discussed based on the analysis of the distribution of the surface charge.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Non-Destructive Testing Techniques · Ultrasonics and Acoustic Wave Propagation · Geophysical Methods and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Shaanxi Engineering Research Center of NDT and Structural Integrity Evaluation, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University , Xi’an 710049, Shannxi, China
Funding
National Key Research and Development Program of China · Fundamental Research Funds for the Central Universities · National Science Foundation of China
References (20)
Show source-provided references
1. Assessment of stress corrosion crack initiation and propagation in AISI type 316 stainless steel by electrochemical noise technique10.1016/j.corsci.2005.09.007 ↗
2. Quantitative evaluation of corrosion in a thin small-bore piping system using bobbin-type magnetic camera10.1007/s10921-013-0204-x ↗
3. A quantitative detection method for stress corrosion cracks in turbine discs using a BPSO-RBFNN model10.1088/1361-6501/aad468 ↗
4. A continuum damage model for weld heat affected zone under low cycle fatigue loading10.1016/0013-7944(90)90081-Q ↗
5. A continuum damage model for ductile fracture of weld heat affected zone10.1016/0013-7944(91)90172-W ↗
6. A new approach for optimal design of eddy current testing probes10.1007/bf02446114 ↗
7. Novel insight into swept frequency eddy-current non-destructive evaluation of material defects10.1016/j.measurement.2017.11.039 ↗
8. Eddy current inspection of closed fatigue and stress corrosion cracks10.1088/0957-0233/18/11/021 ↗
9. Assessment of local conductivity distribution in stress corrosion crack region using direct current potential drop method10.1016/j.corsci.2017.01.019 ↗
10. Fast simulation of ECT signal due to a conductive crack of arbitrary width10.1109/tmag.2006.870973 ↗
11. Efficient numerical simulation of DC potential drop signals for application to NDT of metallic foam10.1108/compel-10-2012-0236 ↗
12. Reconstruction of cracks with multiple eddy current coils using a database approach10.1023/a:1022652221598 ↗
13. ECT inversion using a knowledge based forward solver10.1007/bf02446119 ↗
14. On the use of the magnetic vector potential in the finite-element analysis of three-dimensional eddy currents10.1109/20.34388 ↗
15. Physical meaning of gauge conditions in eddy current analysis10.1109/20.280986 ↗
16. Comparison of methods for modelling jumps in conductivity using magnetic vector potential based formulations10.1109/20.582492 ↗
17. Results for benchmark problem 7 (asymmetrical conductor with a hole)10.1108/eb010071 ↗
18. Calculation of three dimensional eddy current by FEM-BEM coupling method10.1109/20.43885 ↗
19. Surface charge analysis in eddy current problems10.1109/tmag.2003.810177 ↗
20. Element-free Galerkin method for static and quasi-static electromagnetic field computation10.1109/tmag.2003.821131 ↗