T-stress estimation by the two-parameter approach for a specimen with a V-shaped notch
- Авторы: Bouledroua O.1, Elazzizi A.1,2, Hadj Meliani M.1,3, Pluvinage G.3, Matvienko Y.4
-
Учреждения:
- LPTPM, FT
- Faculty of Mechanical Engineering
- Laboratoire de Fiabilité Mécanique, LFM-ENIM, île de saulcy 57045
- Laboratory of Modelling Damage and Fracture
- Выпуск: Том 58, № 3 (2017)
- Страницы: 546-555
- Раздел: Article
- URL: https://journals.rcsi.science/0021-8944/article/view/160161
- DOI: https://doi.org/10.1134/S0021894417030208
- ID: 160161
Цитировать
Аннотация
In the present research, T-stress solutions are provided for a V-shaped notch in the case of surface defects in a pressurised pipeline. The V-shaped notch is analyzed with the use of the finite element method by the Castem2000 commercial software to determine the stress distribution ahead of the notch tip. The notch aspect ratio is varied. In contrast to a crack, it is found that the T-stress is not constant and depends on the distance from the notch tip. To estimate the T-stress in the case of a notch, a novel method is developed, inspired by the volumetric method approach proposed by Pluvinage. The method is based on averaging the T-stress over the effective distance ahead of the notch tip. The effective distance is determined by the point with the minimum stress gradient in the fracture process zone. This approach is successfully used to quantify the constraints of the notch-tip fields for various geometries and loading conditions. Moreover, the proposed T-stress estimation creates a basis for analyzing the crack path under mixed-mode loading from the viewpoint of the two-parameter fracture mechanics.
Ключевые слова
Об авторах
O. Bouledroua
LPTPM, FT
Автор, ответственный за переписку.
Email: o.bouledroua@univhb-chlef.dz
Алжир, Chlef, 02000
A. Elazzizi
LPTPM, FT; Faculty of Mechanical Engineering
Email: o.bouledroua@univhb-chlef.dz
Алжир, Chlef, 02000; Oran, 31000
M. Hadj Meliani
LPTPM, FT; Laboratoire de Fiabilité Mécanique, LFM-ENIM, île de saulcy 57045
Email: o.bouledroua@univhb-chlef.dz
Алжир, Chlef, 02000; Metz
G. Pluvinage
Laboratoire de Fiabilité Mécanique, LFM-ENIM, île de saulcy 57045
Email: o.bouledroua@univhb-chlef.dz
Франция, Metz
Y. Matvienko
Laboratory of Modelling Damage and Fracture
Email: o.bouledroua@univhb-chlef.dz
Россия, Moscow, 101990