A method of analysis is proposed for nondestructive evaluation of multiple cracks by means of the d.c. (direct current) potential drop technique. Two and three-dimensional multiple cracks are treated. A methodology for considering interaction of cracks based on the equation for an isolated crack is given to calculate the potential drop between both sides of a crack in multiple cracking in a plate. The inverse problem to evaluate the crack depth is analyzed by comparing the potential drop calculated in this way with the measurement. It is shown that the evaluated crack depth is in good agreement with the actual one.

1.
Abe'
H
Kanoh
Y
1990
An Inverse Problem in Nondestructive Inspection of a Crack in a Plate with an Inhomogeneity by Means of the Electrical Potential Method
Micromechanics and Inhomogeneity
Weng
GJ
Taya
M
Abe'
H
Springer-Verlag
New York
(pg. 
1
-
15
)
2.
Beissner
RE
Teller
CM
Burkhardt
GL
Smith
RT
Barton
JR
1981
Detection and Analysis of Electric-Current Perturbation Caused by Defects
Eddy-Current Characterization of Materials and Structures
ASTM STP 722
Birnbaum
G
Free
G
ASTM
Philadelphia, PA
(pg. 
428
-
446
)
3.
Ghajarieh
R
Saka
M
Abe'
H
Komura
I
Sakamoto
H
1995
Simplified NDE of Multiple Cracks by Means of the Potential Drop Technique
NDT & E International
, vol. 
66
 
2
(pg. 
23
-
28
)
4.
Ghajarieh
R
Saka
M
Sugawara
T
Abe'
H
Komura
I
Sakamoto
H
1994
NDE of Multiple Cracks on the Surface of Materials by Means of the Potential Drop Technique
NDT & E International
, vol. 
66
 
2
(pg. 
143
-
150
)
5.
Johnson
HH
1965
Calibrating the Electric Potential Method for Studying Slow Crack Growth
Journal of Materials Research & Standards
, vol. 
66
 
2
(pg. 
442
-
445
)
6.
Parkins
RN
Singh
PM
1990
Stress Corrosion Crack Coalescence
Journal of Science and Engineering Corrosion
, vol. 
66
 
2
(pg. 
485
-
499
)
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