| METADEX Antwortnummer 14 - © 1998 CSA |
| Title |
| | Finite Element Modeling of the Bulk Magnetization of Railroad Wheels to Improve Test Conditions for Magnetoacoustic Residual Stress Measurements. |
| Author |
| | Fulton, J.P. (Analytical Services and Materials); Wincheski, B. (Analytical Services and Materials); Namkung, M. (NASA Langley Research Center); Utrata, D. (Association of American Railroads) |
| Publication Source |
| | Plenum Press. 233 Spring St., New York, New York 10013, USA. 1993. 1863-1870, Graphs, 7 ref. Accession Number: 94(1):72-8010
Conference: Review of Progress in Quantitative Nondestructive Evaluation. 12B, La Jolla, California, USA, 19-24 July 1992 |
| Document Type |
| | Conference Article |
| Country of Publication |
| | United States |
| Language |
| | English |
| Abstract |
| | The results of analysis clearly indicates that making slight modifications to the shape of the electromagnet can have a significant impact on the bulk magnetization of railroad wheels. It was demonstrated that by changing the geometry of the electromagnet's poles it is possible to obtain a fairly large and uniform inductance in the rims of railroad wheels. These changes should increase the effectiveness of the magnetoacoustic technique for measuring the residual stress in the rims of railroad wheels. Further experimental tests should be performed to study how a magnetic flux gradient within the test sample effects the sensitivity of the magnetoacoustic technique. If necessary , further modifications to the electromagnet's poles could be made to obtain a more suitable flux distribution. The results of the finite element analysis along with the experimental results would be useful in constructing a more complete model to refine understanding of how the magnetoacoustic technique works. This would enable one to make improvements to the technique and, as a result, improve on its sensitivity. |
| Accession Number |
| | 94(1):22-103 |
