SE7809119L - APPARATUS FOR AUTOMATIC THRESHOLD VALUE TESTING WITH CONSTANT STANDARD BETWEEN MIN AND MAXLAST - Google Patents

APPARATUS FOR AUTOMATIC THRESHOLD VALUE TESTING WITH CONSTANT STANDARD BETWEEN MIN AND MAXLAST

Info

Publication number
SE7809119L
SE7809119L SE7809119A SE7809119A SE7809119L SE 7809119 L SE7809119 L SE 7809119L SE 7809119 A SE7809119 A SE 7809119A SE 7809119 A SE7809119 A SE 7809119A SE 7809119 L SE7809119 L SE 7809119L
Authority
SE
Sweden
Prior art keywords
load
crack
value
threshold value
maxlast
Prior art date
Application number
SE7809119A
Other languages
Swedish (sv)
Other versions
SE413438B (en
Inventor
L A Jilken
Original Assignee
Stangakonsult
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 Stangakonsult filed Critical Stangakonsult
Priority to SE7809119A priority Critical patent/SE413438B/en
Priority to DE792953044T priority patent/DE2953044T1/en
Priority to GB8027584A priority patent/GB2050630B/en
Priority to PCT/SE1979/000176 priority patent/WO1980000493A1/en
Priority to NO792806A priority patent/NO144940C/en
Publication of SE7809119L publication Critical patent/SE7809119L/en
Priority to EP79901048A priority patent/EP0016205A1/en
Publication of SE413438B publication Critical patent/SE413438B/en

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
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • 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
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive

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)
  • Metal Rolling (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

When determining the fatigue threshold value of a material, a test specimen (5) manufactured from the material is subjected to a time dependent alternating load (P). The test specimen has a crack notch (1) and the maximum value of the load is chosen so that the crack propagates. By gradually decreasing the maximum value the crack propagation is retarded and will cease at a certain value of the load. The opening of the crack increases successively as the crack propagates. Thus one can gradually decrease the load range during the crack propagation if at the same time the crack opening variation is kept constant. In order to obtain a reproducible fatigue threshold value care is taken to keep the ratio between the minimum and maximum values of the alternating load constant. For each chosen value of said ratio the minimum value of the load will in this way decrease at the same rate as the maximum value of the load decreases.
SE7809119A 1978-08-30 1978-08-30 SET AND APPARATUS FOR EXECUTING THE SET TO DETERMINE THE MINIMUM LOAD SCOPE OF A MATERIAL FOR CRACK GROWTH, IT WILL SAY IT THROUGH TIRE SE413438B (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SE7809119A SE413438B (en) 1978-08-30 1978-08-30 SET AND APPARATUS FOR EXECUTING THE SET TO DETERMINE THE MINIMUM LOAD SCOPE OF A MATERIAL FOR CRACK GROWTH, IT WILL SAY IT THROUGH TIRE
DE792953044T DE2953044T1 (en) 1978-08-30 1979-08-28 METHOD OF DETERMINING THE FATIGUE THRESHOLD VALUE OF A MATERIAL
GB8027584A GB2050630B (en) 1978-08-30 1979-08-28 Method of determining the fatigue threshold value of a material
PCT/SE1979/000176 WO1980000493A1 (en) 1978-08-30 1979-08-28 Method of determining the fatigue threshold value of a material
NO792806A NO144940C (en) 1978-08-30 1979-08-29 PROCEDURE FOR AA DETERMINE A MATERIAL THREAT VALUE AT EXPENSE.
EP79901048A EP0016205A1 (en) 1978-08-30 1980-03-25 Method of determining the fatigue threshold value of a material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7809119A SE413438B (en) 1978-08-30 1978-08-30 SET AND APPARATUS FOR EXECUTING THE SET TO DETERMINE THE MINIMUM LOAD SCOPE OF A MATERIAL FOR CRACK GROWTH, IT WILL SAY IT THROUGH TIRE

Publications (2)

Publication Number Publication Date
SE7809119L true SE7809119L (en) 1980-03-01
SE413438B SE413438B (en) 1980-05-27

Family

ID=20335687

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7809119A SE413438B (en) 1978-08-30 1978-08-30 SET AND APPARATUS FOR EXECUTING THE SET TO DETERMINE THE MINIMUM LOAD SCOPE OF A MATERIAL FOR CRACK GROWTH, IT WILL SAY IT THROUGH TIRE

Country Status (6)

Country Link
EP (1) EP0016205A1 (en)
DE (1) DE2953044T1 (en)
GB (1) GB2050630B (en)
NO (1) NO144940C (en)
SE (1) SE413438B (en)
WO (1) WO1980000493A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3314181A1 (en) * 1983-04-19 1984-10-25 Kraftwerk Union AG, 4330 Mülheim METHOD FOR MONITORING THE FATIGUE OF COMPONENTS, e.g. IN NUCLEAR POWER PLANTS
JP2952594B1 (en) * 1998-09-28 1999-09-27 株式会社ビーエムシー Sensor for detecting fatigue damage of structural material and method of mounting the same
CN103743636B (en) * 2014-01-16 2015-11-18 清华大学 A kind of method predicting welding joint threshold in fatigue crack propagation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983745A (en) * 1975-08-08 1976-10-05 Mts Systems Corporation Test specimen crack correlator
US4003246A (en) * 1975-08-08 1977-01-18 Mts Systems Corporation Specimen crack stress intensity control loop for test device

Also Published As

Publication number Publication date
NO144940C (en) 1981-12-09
GB2050630B (en) 1983-02-09
DE2953044T1 (en) 1980-12-18
WO1980000493A1 (en) 1980-03-20
SE413438B (en) 1980-05-27
DE2953044C2 (en) 1987-09-17
NO792806L (en) 1980-03-03
GB2050630A (en) 1981-01-07
EP0016205A1 (en) 1980-10-01
NO144940B (en) 1981-08-31

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