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Anisotropic effects on crack propagation in pressurized line pipes under running ductile fracture scenarios

  • The current analyses present results of running ductile fracture propagation in high strength X100 line pipe steels under the influence of anisotropy. Mechanical anisotropy is commonly available in pipe products as a result of the manufacturing process, especially, those subjected to hot/cold-worked deformation. The outcomes of the present analyses show that its effect on the behavior of running ductile fracture in cracked pipes undergoing depressurization is meaningful. For instance, the Crack-Tip Opening Angle (CTOA) not only exhibits a strong dependence to the pipe's diameter size, but also to the material's anisotropy nature when compared to a hypothetical isotropic material. Moreover, laboratory scale tests such as those performed on Battelle Drop Weight Tear (BDWT) samples provide useful information about initiation of ductile crack propagation when the anisotropy features are taken into account in the material description.

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Metadaten
Author:Lufeng Xue, Vincent KeimORCiD, M. Paredes, Aida NonnORCiDGND, Tomasz Wierzbicki
DOI:https://doi.org/10.1016/j.engfracmech.2021.107748
Parent Title (English):Engineering fracture mechanics
Publisher:Elsevier
Document Type:Article
Language:English
Year of first Publication:2021
Release Date:2022/02/02
Tag:BEHAVIOR; Fracture anisotropy; INITIATION; MODEL; Non-associated flow rule; PREDICTION; Rate dependent MMC Model; Running ductile fracture; STATE; STEEL; STRAIN-RATE; TOUGHNESS
Volume:249
Article Number:107748
Institutes:Fakultät Maschinenbau
Technologie-Campus Neustadt an der Donau
Fakultät Maschinenbau / Computational Mechanics and Materials Lab (CMM)
Begutachtungsstatus:peer-reviewed
research focus:Produktion und Systeme
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG