Theoretical Analysis of Loading Effect on A. C. Potential Drop for Measurement of Cracks

Masumi Saka, Takashi Kaneko, Hiroyuki Abé

研究成果: Article査読

1 被引用数 (Scopus)

抄録

A method for theoretical analysis of loading effect on a. c. potential drop is proposed for measurement of cracks. By treating formulation to solve Maxwell’s equations for an a. c. current flow in a specimen, it is found that the conductivity σ and the permeability µ of the specimen can be handled collectively in the form [formula omitted]. The quantity [formula omitted] is denoted by γ. Loading causes a change in γ. Since the change is considered to be dominant along the crack front, the loading effect is analyzed by introducing a thin layer confining the change along the crack front. The layer is named line impedance. Its property is determined by a frequency of the current and the change in γ, which is expressed as a function of the stress intensity factor, KI, through a 2-D experiment. Numerical results are shown for a semielliptical and a semicircular surface crack.

本文言語English
ページ(範囲)1116-1122
ページ数7
ジャーナルTransactions of the Japan Society of Mechanical Engineers Series A
57
537
DOI
出版ステータスPublished - 1991

ASJC Scopus subject areas

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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