التفاصيل البيبلوغرافية
| العنوان: |
Model-based Inverse Methods for Sizing Cracks ofVarying Shape and Location in Bolt-hole Eddy Current (BHEC) Inspections. |
| المؤلفون: |
Aldrin, John C., Sabbagh, Harold A., Zhao, Liming, Sabbagh, Elias, Murphy, R. Kim, Keiser, Mark, Flores-Lamb, Jennifer, Forsyth, David S., Motes, Doyle, Lindgren, Eric A., Mooers, Ryan |
| المصدر: |
AIP Conference Proceedings; 2016, Vol. 1706 Issue 1, p1-11, 11p, 2 Color Photographs, 2 Diagrams, 4 Charts, 4 Graphs |
| مصطلحات موضوعية: |
EDDY currents (Electric), INVERSION (Geophysics), FRACTURE mechanics, INSPECTION & review, THICKNESS measurement, SIGNAL processing |
| مستخلص: |
A comprehensive approach is presented to perform model-based inversion of crack characteristics using bolt hole eddy current (BHEC) techniques. Data was acquired for a wide range of crack sizes and shapes, including mid-bore, corner and through-thickness crack types, and from both standard eddy current hardware and a prototype BHEC system with z-axis position encoding. Signal processing algorithms were developed to process and extract features from the 2D data sets, and inversion algorithms using VIC-3D generated surrogate models were used for inverting crack size. New model results are presented, which now address the effect of having a corner crack at an edge and a through crack adjacent to two edges. A two-step inversion process was implemented that first evaluates the material layer thickness, crack type and location, in order to select the most appropriate VIC-3D surrogate model for subsequent crack sizing inversion step. Inversion results for select mid-bore, through and corner crack specimens are presented where sizing performance was found to be satisfactory in general, but also depend on the size and location of the flaw. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |