Abstract
A method of three-dimensional identification of a semi-elliptical surface crack by direct-current electrical potential difference method with a multiple-probe sensor was proposed and its validity was numerically examined. The condition of the surface crack embedded in a conductive plate was specified by the two-dimensional location of the crack center, (yc, z c), length and depth of the crack, c and a, and the surface and inward angles of the crack plane, θsur and θ in. Identification was carried out based on the distribution of the electrical potential difference around the crack measured on the surface of the plate with the "multiple-probe sensor" which is composed of many probes aligned in two orthogonal directions. The location, (yc, zc), and surface angle, θsur, were evaluated using the line and point symmetries of the potential difference distribution. The inward angle, θin, was determined by the magnitude of symmetry of potential difference distribution with reference to the evaluated crack line. Finally, length and depth of the crack, c and a, were determined using the exact solution of potential difference for an inclined inner elliptical crack which yields similar potential difference to that of the inclined semi-elliptical surface crack. The validity of the method was numerically confirmed by carrying out the evaluation based on the result obtained by finite element analysis.
| Original language | English |
|---|---|
| Title of host publication | American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP |
| Editors | C.D. Rodery, Y. Takagi, N. Miura, T.G. Seipp, S. Iyer, M.J. Cohn, J.F. McCabe |
| Pages | 85-92 |
| Number of pages | 8 |
| Volume | 471 |
| DOIs | |
| Publication status | Published - 2004 |
| Event | 2004 ASME/JSME Pressure Vessels and Piping Conference - San Diego, CA, United States Duration: Jul 25 2004 → Jul 29 2004 |
Other
| Other | 2004 ASME/JSME Pressure Vessels and Piping Conference |
|---|---|
| Country | United States |
| City | San Diego, CA |
| Period | 7/25/04 → 7/29/04 |
Fingerprint
ASJC Scopus subject areas
- Mechanical Engineering
- Industrial and Manufacturing Engineering
Cite this
Three-dimensional identification of semi-elliptical surface crack by means of direct-current electrical potential difference method with multiple-probe sensor. / Tada, Naoya; Okada, Masayoshi; Iwamoto, Jun.
American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP. ed. / C.D. Rodery; Y. Takagi; N. Miura; T.G. Seipp; S. Iyer; M.J. Cohn; J.F. McCabe. Vol. 471 2004. p. 85-92.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Three-dimensional identification of semi-elliptical surface crack by means of direct-current electrical potential difference method with multiple-probe sensor
AU - Tada, Naoya
AU - Okada, Masayoshi
AU - Iwamoto, Jun
PY - 2004
Y1 - 2004
N2 - A method of three-dimensional identification of a semi-elliptical surface crack by direct-current electrical potential difference method with a multiple-probe sensor was proposed and its validity was numerically examined. The condition of the surface crack embedded in a conductive plate was specified by the two-dimensional location of the crack center, (yc, z c), length and depth of the crack, c and a, and the surface and inward angles of the crack plane, θsur and θ in. Identification was carried out based on the distribution of the electrical potential difference around the crack measured on the surface of the plate with the "multiple-probe sensor" which is composed of many probes aligned in two orthogonal directions. The location, (yc, zc), and surface angle, θsur, were evaluated using the line and point symmetries of the potential difference distribution. The inward angle, θin, was determined by the magnitude of symmetry of potential difference distribution with reference to the evaluated crack line. Finally, length and depth of the crack, c and a, were determined using the exact solution of potential difference for an inclined inner elliptical crack which yields similar potential difference to that of the inclined semi-elliptical surface crack. The validity of the method was numerically confirmed by carrying out the evaluation based on the result obtained by finite element analysis.
AB - A method of three-dimensional identification of a semi-elliptical surface crack by direct-current electrical potential difference method with a multiple-probe sensor was proposed and its validity was numerically examined. The condition of the surface crack embedded in a conductive plate was specified by the two-dimensional location of the crack center, (yc, z c), length and depth of the crack, c and a, and the surface and inward angles of the crack plane, θsur and θ in. Identification was carried out based on the distribution of the electrical potential difference around the crack measured on the surface of the plate with the "multiple-probe sensor" which is composed of many probes aligned in two orthogonal directions. The location, (yc, zc), and surface angle, θsur, were evaluated using the line and point symmetries of the potential difference distribution. The inward angle, θin, was determined by the magnitude of symmetry of potential difference distribution with reference to the evaluated crack line. Finally, length and depth of the crack, c and a, were determined using the exact solution of potential difference for an inclined inner elliptical crack which yields similar potential difference to that of the inclined semi-elliptical surface crack. The validity of the method was numerically confirmed by carrying out the evaluation based on the result obtained by finite element analysis.
UR - http://www.scopus.com/inward/record.url?scp=7744219981&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=7744219981&partnerID=8YFLogxK
U2 - 10.1115/PVP2004-2245
DO - 10.1115/PVP2004-2245
M3 - Conference contribution
AN - SCOPUS:7744219981
VL - 471
SP - 85
EP - 92
BT - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
A2 - Rodery, C.D.
A2 - Takagi, Y.
A2 - Miura, N.
A2 - Seipp, T.G.
A2 - Iyer, S.
A2 - Cohn, M.J.
A2 - McCabe, J.F.
ER -