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Effects of Surface Crack Shape on Fracture Behavior of Oil Pipelines Based on the MMC Criterion.
Wu, Jun; Gong, Xiaoyan; Xue, He; Wang, Rongxin; Wang, Zheng.
Afiliación
  • Wu J; School of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.
  • Gong X; School of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.
  • Xue H; School of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.
  • Wang R; School of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.
  • Wang Z; School of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.
Materials (Basel) ; 17(17)2024 Sep 06.
Article en En | MEDLINE | ID: mdl-39274795
ABSTRACT
This study employs a hybrid numerical-experimental calibration method based on phenomena to determine the fracture parameters of the Modified Mohr-Coulomb (MMC) model. Using a self-developed VUMAT subroutine and the element deletion technique, the fracture process of a wide plate pipeline is thoroughly analyzed. This study investigates the impact of various crack shapes on the fracture response under tensile loading and the influence of surface crack size on the initiation location of a wide plate. These results demonstrate the calibrated MMC fracture model's accurate prediction of the toughness fracture behavior of X80 pipeline steel. Under equal area conditions of the dangerous section, circular cracks exhibit lower bearing capacity compared to elliptical cracks. Elliptical cracks predominantly propagate in the thickness direction, whereas circular cracks show nearly uniform growth in all directions. Furthermore, when the crack depth is less than half of the wall thickness, the damage accumulation value at the midpoint of the crack front is maximized; conversely, when the crack front is closer to the internal measurement point of the wide plate, the damage accumulation value is maximized.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Materials (Basel) Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
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PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Materials (Basel) Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Suiza