..., the Estimation of Fracture Energy and J R Curve,” Eng. Fract. Mech. , Vol. 75, 2008, pp. 236–252), and Kroon et al. (“A Probabilistic Model for Cleavage Fracture with a Length Scale-Parameter Estimation and Predictions of Growing Crack Experiments,” Eng. Fract. Mech. , Vol. 75, 2008, pp. 2398–2417) presented two...

... scaling factor was applied. KEYWORDS: Fracture toughness, J-R curve, tearing instability, segregation, Zr-2.5%Nb, pressure tube Introduction A number of premature failures of pressure tubes have been reported 1 . The governing factors for the primary failure were identi ed and modi cations in the process...

...Xian-Kui Zhu; Brian N. Leis; James A. Joyce Fracture resistance of ductile materials is often characterized by a J-R curve, and measured using the fracture toughness testing standard ASTM E1820 (Standard Test Method for Measurement of Fracture Toughness). The recommended elastic unloading...

...X-K Zhu; BN Leis Single specimen J-R curve testing for X80 pipeline steel was conducted using single edge notched bend (SENB) and single edge notched tension (SENT) specimens with various crack lengths. Test data indicate that the J-R curves for this steel are strongly constraint dependent...

... steels and one low-alloy C-Mn steel. The results obtained clearly show that MC(T) samples exhibit lower fracture toughness properties, both in terms of initiation of ductile tearing (according to various test standards) and resistance to ductile crack propagation (J-R curve). The reduction of tearing...