Application of A.C. Potential Drop Technique to Measure the Stress-Intensity Factor

Masumi Saka, Masahito Nakayama, Hiroyuki Abe

Research output: Contribution to journalArticlepeer-review


An a.c. potential drop technique is applied for measurement of the stress-intensity factor, K1. When a conductive material with a surface crack is loaded under a flow of a.c, a change occurs in electrical potential difference between two points located on either side of the surface separated by the crack. By measuring the change for different loadings, it is found that the change shows a linear relationship with the change in K1. Also, the relationship is revealed to be independent of the crack depth. A.c. in the amount of 1 ampere with a frequency of 10 kHz is used. Finally, a procedure for applying the present result to an in situ measurement of K1, is proposed and verified.

Original languageEnglish
Pages (from-to)1855-1860
Number of pages6
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Issue number528
Publication statusPublished - 1990


  • A.C. Potential-Drop Technique
  • Fracture
  • In situ Measurement
  • Linear Relationship
  • Stress-Intensity Factor
  • Surface Crack

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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