JPS56117144A - Measurement of fatigue damage - Google Patents

Measurement of fatigue damage

Info

Publication number
JPS56117144A
JPS56117144A JP1917480A JP1917480A JPS56117144A JP S56117144 A JPS56117144 A JP S56117144A JP 1917480 A JP1917480 A JP 1917480A JP 1917480 A JP1917480 A JP 1917480A JP S56117144 A JPS56117144 A JP S56117144A
Authority
JP
Japan
Prior art keywords
construction
chip
cracks
electric resistance
measured
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1917480A
Other languages
Japanese (ja)
Inventor
Tasuku Shimizu
Makoto Hayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1917480A priority Critical patent/JPS56117144A/en
Publication of JPS56117144A publication Critical patent/JPS56117144A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/06—Special adaptations of indicating or recording means
    • G01N3/066—Special adaptations of indicating or recording means with electrical indicating or recording means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0073—Fatigue

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

PURPOSE:To estimate the degree of stress of damage of a construction nondestructively by attaching a chip with one or plural slits or cracks to the construction and measuring the change of electric resistance during its operation. CONSTITUTION:Chip 1 with slit 2 is attahced to a construction such as heavy electric and atomic powered machine and appartus by means of selamic injection and electric resistance is measured seccessively or intermittently by using input terminal 5 and output terminal 6. Thus, the fatigue or creep damage of a construction at real working can be measured nondistructively and directly from the construction by using the characteristics that the electric resistance value of a chip with cracks changes together with the development of the cracks, making it possible to increase the reliability of machines.
JP1917480A 1980-02-20 1980-02-20 Measurement of fatigue damage Pending JPS56117144A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1917480A JPS56117144A (en) 1980-02-20 1980-02-20 Measurement of fatigue damage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1917480A JPS56117144A (en) 1980-02-20 1980-02-20 Measurement of fatigue damage

Publications (1)

Publication Number Publication Date
JPS56117144A true JPS56117144A (en) 1981-09-14

Family

ID=11991981

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1917480A Pending JPS56117144A (en) 1980-02-20 1980-02-20 Measurement of fatigue damage

Country Status (1)

Country Link
JP (1) JPS56117144A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60209137A (en) * 1984-04-03 1985-10-21 Topy Ind Ltd Predicting method of fatigue damage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60209137A (en) * 1984-04-03 1985-10-21 Topy Ind Ltd Predicting method of fatigue damage
JPH0374785B2 (en) * 1984-04-03 1991-11-28

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