| Инд. авторы: | Moskvichev E. |
| Заглавие: | Fracture assessment of cracked welded structures considering the heterogeneity of welded joints |
| Библ. ссылка: | Moskvichev E. Fracture assessment of cracked welded structures considering the heterogeneity of welded joints // Procedia Materials Science. - 2014. - Iss. 3. - P.556-561. - ISSN 2211-8128. |
| Внешние системы: | DOI: 10.1016/j.mspro.2014.06.092; РИНЦ: 24240479; |
| Реферат: | eng: The crack-like defects often cause the failure of welded structures. Most of the fracture assessment procedures that are used for
solving this problem are based on deterministic approaches, for example Zerbst (2007). But the experimental results show that
the mechanical properties and fracture toughness of welded joints are significantly changing with a random variation. Taking this
into account the fracture assessment of welded structures requires improved numerical approaches. A numerical model of
heterogeneous welded joint with randomly varying yield strength was proposed. The results show that the mechanical
heterogeneity leads to higher J-integral values for the defects. This implies that neglecting the mechanical heterogeneity of
welded joints results in underrating of the risk of failure of welded structures. The proposed numerical estimation of the fracture
toughness is used for some typical welded joints and thin-walled pressure vessel. The relations between the variation of yield
strength in cracked welded joints and J-integral are presented as the correction functions for calculated parameter of crack
resistance. |
| Ключевые слова: | J-integral; crack; welded structures; heterogeneity; weld joint; |
| Издано: | 2014 |
| Физ. характеристика: | с.556-561 |
| Цитирование: | 1. Zerbst, U., Schödel, M., Webster, S., Ainsworth, R.A., 2007. Fitness-for-service fracture assessment of structures containing cracks, A workbook based on the European SINTAP/FITNET procedure. Academic Press, pp. 320. 2. Moskvichev, E., 2013. The Experimental Study and Numerical Estimation of Fracture Toughness of Heterogeneous Welded Joints. Key Engineering Materials, 592-593, 173. 3. Morozov, E.M., Nikishov, G.P., 2007. The Finite-Element Method in Fracture Mechanics [in Russian]. Izdatelstvo LKI, Moscow, pp. 256 |