Issue 33

G.P. Nikishkov et alii, Frattura ed Integrità Strutturale, 33 (2015) 73-79; DOI: 10.3221/IGF-ESIS.33.10 76 CCP: 0 2 3 L W a W     (9) 3PB: 2 0 ( ) 1.455 2 L W a P H    CT: 2 0 1.455 1 2 2 L a a P W W W                     where 0  is yield stress, a is crack length, W and H are specimen width and semi-height. Limit loads for the edge cracked plate and center cracked plate L  are given if the form of remote stress. Limit load L P for three point bend and compact specimens is a load per unit thickness. Figure 1 : Specimens: edge cracked plate (ECP), center cracked plate (CCP), three-point bend specimen (3PB), compact tension specimen (CT). Figure 2 : Finite element mesh for an edge cracked plate / 0.3 a W  . Values of the J -integral are calculated with the domain decomposition method for node locations at the crack front. Results for the J -integral are presented as normalized elastic-plastic stress intensity factors 2 0 1 (1 ) ep JE K W      (10)