Strain-based approach to fatigue crack initiation on high-strength-steel welded joints under multiaxial loading

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussavertaisarvioitu

Tutkijat

Organisaatiot

  • Ecole Polytechnique Federale de Lausanne

Kuvaus

A recently novel strain-based approach recently proposed by Remes (Remes 2013) for the fatigue strength modelling of welded steel joints is extended here to consider multiaxial loading conditions and three dimensions finite element models. Only the first step of the approach to initiate a crack is presented in this paper. The multiaxial fatigue number of cycles to initiate a crack of full-scale tube-to-plate specimens in S690QL steel is assessed and compared to experimental results. As fatigue cracks are initiating at the weld toe, the statistical distributions of the main geometrical parameters of the weld are defined by the mean of 3D laser scans and used to perform parametrical analyses. In addition, variations in the material characteristics due to the welding process, i.e. in the heat affected zone and the base material, are considered. Effects of the residual stresses are also considered. Results of the parametrical analyses and comparisons with the experiments are presented and discussed.

Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoADVANCES IN ENGINEERING MATERIALS, STRUCTURES AND SYSTEMS: INNOVATIONS, MECHANICS AND APPLICATIONS
ToimittajatA Zingoni
TilaJulkaistu - 22 elokuuta 2019
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaInternational Conference on Structural Engineering, Mechanics and Computation - Cape Town, Etelä-Afrikka
Kesto: 2 syyskuuta 20194 syyskuuta 2019
Konferenssinumero: 7

Conference

ConferenceInternational Conference on Structural Engineering, Mechanics and Computation
LyhennettäSEMC
MaaEtelä-Afrikka
KaupunkiCape Town
Ajanjakso02/09/201904/09/2019

ID: 40314762