Ductile rupture of A508 steel under nonradial loading

Fracture toughness of structural components: influence of constraint

“…These models are based upon a number of simplifying assumptions which do not necessarily reflect the actual behaviour of real materials. However, some experiments on low alloy steel [26] have shown that results by Rice and Tracey were rather well obeyed. On the other hand one must remember that the high level of the stress triaxiality impedes plastic flow.…”

A note on the new local damage criterion for ductile fracture under non-proportional loading

“…1, assuming (~Jo~)i (i=1,2) is constant in each loading step, then the criterion gives In terms of the slightly modified Rice-Tracey void growth model to incorporate the effect of matrix work hardening [ 11,12],…”

“…1 Vg c =~l n R0 = p'ex + ' e x p From Marini and co-workers' two-step loading experimental results [ 11], we have a = 1.25 for a9 = 0.31 and the values ofWt, c and V can be determined through (16) and (19) respectively, as shown in Table 1~ ° Plots of Woc and V o vs. stress triaxiality (~3J%q) are shown in Fig. 2, which indicates that Woc is not sensitive to the stress states and is almost a material constant.…”

“…]P ~-l dP (9) According to the calculation results of Marini and co-workers [11], one may assume the form of g(p) as…”

Stress, deformation and damage fields near the tip of a crack in a damaged nonlinear material

“…Extensive experiments [1][2][3][4][5][6][7][8][9][10][11][12] have shown that ductile fracture in metals involves considerable damage via the nucleation, growth and coalescence of microvoids or microcracks. The material ahead of the crack tip deforms intensely and a damage zone will form in which microvoids or microcracks are usually nucleated by cracking of the inclusion itself and/or debonding at the inclusion-matrix interface, and then grow with increase of deformation.…”