Crack detection via strain measurements in fatigue testing
Artikel i vetenskaplig tidskrift, 2021

Fatigue cracks have appeared as a significant issue for joints and connections in existing steel structures in the last decades. Therefore, those are a major inspection and maintenance matter for any steel structure's operator. This emphasises the importance of using a reliable detection method to determine the crack size and assessing the severity of such a crack on the structural integrity of a structure. In this article, the effectiveness of strain measurement in detecting fatigue cracks in transversal non‐load carrying welded attachment subjected to out of plane axial loading is studied. Numerical analysis and experimental investigations allowed to correlate the decrease in strain measured by attached gauges to the crack depth at the weld toe. In addition, different strain evolution patterns were found during fatigue testing, and the fracture surfaces of the specimens were observed to interpret these patterns. Moreover, the crack position with respect to the weld toe surface was predicted via strain measurements.

fatigue testing

transversal attachment

strain gauge

fatigue crack

crack detection

Författare

Hassan al-Karawi

Chalmers, Arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik

Rüdiger Ulrich Franz von Bock und Polach

Universität Hamburg

Mohammad al-Emrani

Chalmers, Arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik

Strain

0039-2103 (ISSN) 1475-1305 (eISSN)

Vol. In Press e12384

LifeExt - Livslängdsförlängning för befintliga stålbroar

VINNOVA, 2017-06-08 -- 2019-12-31.

Trafikverket, 2018-05-15 -- 2020-11-30.

Ämneskategorier

Maskinteknik

Materialteknik

Samhällsbyggnadsteknik

Drivkrafter

Hållbar utveckling

Styrkeområden

Building Futures (2010-2018)

Livsvetenskaper och teknik (2010-2018)

Materialvetenskap

Infrastruktur

Chalmers materialanalyslaboratorium

DOI

10.1111/str.12384

Mer information

Senast uppdaterat

2021-04-14