Strain-Gauge Method of Detecting Subcritical Fatigue Cracks in Low-Carbon Steel Welds

Detection of subcritical fatigue cracks in low-carbon steel welds with the strain-gauge nullindicator method based on the amplitude difference and phase difference procedures was investigated. It was established that a marked growth of the difference in strain amplitudes pointed to the origin of a m...

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Bibliographic Details
Published inStrength of materials Vol. 47; no. 3; pp. 467 - 473
Main Authors Lukashevich, A. O., Leonets’, V. A., Chaus, L. M.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.05.2015
Springer
Subjects
Amplitudes
Carbon steel
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Crack propagation
Fatigue
Fatigue cracks
Fatigue failure
Fatigue testing machines
Fracture mechanics
Low carbon steels
Materials
Materials Science
Methods
Solid Mechanics
Steel, Structural
Visual
Welded joints
weld
high-frequency mechanical hammering
strain-gauge null-indicator method of crack detection
fatigue cracks
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Summary:Detection of subcritical fatigue cracks in low-carbon steel welds with the strain-gauge nullindicator method based on the amplitude difference and phase difference procedures was investigated. It was established that a marked growth of the difference in strain amplitudes pointed to the origin of a main crack 1 mm long near the weld. An initial increase in strain amplitude differences reveals fatigue damage much earlier in comparison with the visual crack detection. The phase difference procedure cuts down the time of fatigue damage detection in low-carbon steel welds tens of times from the visual method.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0039-2316
1573-9325
DOI:10.1007/s11223-015-9679-2