Electric field analysis for determination of shape and size of semi-elliptical surface-crack by means of D.C. potential drop technique

Naoya Tada, Yoshinori Sakanoue, Takayuki Kitamura, Ryuichi Ohtani

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

It is necessary for determination of crack size and shape by means of D.C. potential drop technique to know electric potential distribution at the surface of cracked body beforehand. The potential distribution on a body with semi-elliptical surface-crack is investigated in this paper. The results obtained are summarized as follows. (i) Exact distribution is derived as Eqs. (1) approximately (3) for semi-infinite body with a semi-elliptical surface-crack. As it requires numerical integral to evaluate the potential, a simple approximation method (Eqs. (14) and (15) is proposed for convenience. It is confirmed by numerical analysis that the error of approximation is very small. (ii) We propose an easy method to make a cracked body with an arbitrary crack shape and size for the calibration of electric potential distribution. Plate specimens with a semi-elliptical surface-crack are made of a wood metal, and the potential distribution is examined experimentally.

Original languageEnglish
Pages (from-to)259-264
Number of pages6
JournalNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume56
Issue number522
Publication statusPublished - Feb 1990
Externally publishedYes

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Electric fields
Cracks
Electric potential
Numerical analysis
Wood
Metals
Calibration

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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title = "Electric field analysis for determination of shape and size of semi-elliptical surface-crack by means of D.C. potential drop technique",
abstract = "It is necessary for determination of crack size and shape by means of D.C. potential drop technique to know electric potential distribution at the surface of cracked body beforehand. The potential distribution on a body with semi-elliptical surface-crack is investigated in this paper. The results obtained are summarized as follows. (i) Exact distribution is derived as Eqs. (1) approximately (3) for semi-infinite body with a semi-elliptical surface-crack. As it requires numerical integral to evaluate the potential, a simple approximation method (Eqs. (14) and (15) is proposed for convenience. It is confirmed by numerical analysis that the error of approximation is very small. (ii) We propose an easy method to make a cracked body with an arbitrary crack shape and size for the calibration of electric potential distribution. Plate specimens with a semi-elliptical surface-crack are made of a wood metal, and the potential distribution is examined experimentally.",
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T1 - Electric field analysis for determination of shape and size of semi-elliptical surface-crack by means of D.C. potential drop technique

AU - Tada, Naoya

AU - Sakanoue, Yoshinori

AU - Kitamura, Takayuki

AU - Ohtani, Ryuichi

PY - 1990/2

Y1 - 1990/2

N2 - It is necessary for determination of crack size and shape by means of D.C. potential drop technique to know electric potential distribution at the surface of cracked body beforehand. The potential distribution on a body with semi-elliptical surface-crack is investigated in this paper. The results obtained are summarized as follows. (i) Exact distribution is derived as Eqs. (1) approximately (3) for semi-infinite body with a semi-elliptical surface-crack. As it requires numerical integral to evaluate the potential, a simple approximation method (Eqs. (14) and (15) is proposed for convenience. It is confirmed by numerical analysis that the error of approximation is very small. (ii) We propose an easy method to make a cracked body with an arbitrary crack shape and size for the calibration of electric potential distribution. Plate specimens with a semi-elliptical surface-crack are made of a wood metal, and the potential distribution is examined experimentally.

AB - It is necessary for determination of crack size and shape by means of D.C. potential drop technique to know electric potential distribution at the surface of cracked body beforehand. The potential distribution on a body with semi-elliptical surface-crack is investigated in this paper. The results obtained are summarized as follows. (i) Exact distribution is derived as Eqs. (1) approximately (3) for semi-infinite body with a semi-elliptical surface-crack. As it requires numerical integral to evaluate the potential, a simple approximation method (Eqs. (14) and (15) is proposed for convenience. It is confirmed by numerical analysis that the error of approximation is very small. (ii) We propose an easy method to make a cracked body with an arbitrary crack shape and size for the calibration of electric potential distribution. Plate specimens with a semi-elliptical surface-crack are made of a wood metal, and the potential distribution is examined experimentally.

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