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Numerical modelling of damage behaviour of laser-hybrid welds

  • The effect of laser-hybrid welds on deformation and failure behaviour of fracture mechanics specimens is investigated in order to provide quantitative prediction of damage tolerance and residual strength. The simulation of crack initiation and crack extension in hybrid welds is performed by applying GTN damage model. The identification of damage parameters requires combined numerical and experimental analyses. The tendency to crack path deviation during crack growth depends strongly on the constraint development at the interface between base and weld metal. In order to quantify the influence of local stress state on the crack path deviation, the initial crack location is varied. Finally, the results from fracture mechanics tests are compared to real component, beam-column-connection, with respect to fracture resistance.

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Metadaten
Author:Aida NonnORCiDGND, Winfried Dahl, Wolfgang Peter Bleck
DOI:https://doi.org/10.1016/j.engfracmech.2007.10.015
Parent Title (English):Engineering Fracture Mechanics
Document Type:Article
Language:English
Year of first Publication:2008
Release Date:2021/03/15
Tag:Crack path deviation; Damage; GTN model; Laser-hybrid welds
Volume:75
Article Number:11
First Page:3251
Last Page:3263
Konferenzangabe:9th European Mechanics of Material Conference (EUROMECH-MECAMAT 2006), Local Approach to Fracture, Moret-Sur-Loing, France
Institutes:Fakultät Maschinenbau
Technologie-Campus Neustadt an der Donau
Fakultät Maschinenbau / Computational Mechanics and Materials Lab (CMM)
Begutachtungsstatus:peer-reviewed
Publication:Externe Publikationen
research focus:Produktion und Systeme