Fracture Processes in Concrete and Fiber Reinforced Cementitious Composites

Mechanics of Shear Rupture Applied to Earthquake Zones

“…(The cohesive zone model was also used to describe crack extensions in concrete by Hillerborg et a1 (1976) and Li and Liang (1986). In this case the breakdown process involves the joining of discontinuous microcracks and pull-out of I the aggregates from the cement matrix).…”

“…It should be noted that (52a) may in fact be regarded as a multi-degree-of-freedom system extension of (21) For intermediate range of the half crack length 1 , comparable in size to w, (52) together with a zero net stress intensity condition (33) was solved numerically by Li and Liang (1986) and their result for a linear slip-weakening relation is shown as the solid line in Fig. 27.…”

Fracture Mechanics of Concrete – State-of-the-Art Review

“…From the analysis of the results, it was concluded that LEFM techniques are not suited to predicting unstable cracking in concrete members of the proportions normally used in buildings. Li and Liang (1986) suggested that process zone length in concrete and fiberreinforced concrete is not to be a material property but depends on the specimen and the loading configuration. The overall mechanical behavior of these materials could be strongly influenced by the stress-separation constitutive relation.…”

Cohesive element formulation for z-pin delamination bridging in fibre reinforced laminates

“…The approach of combining the cohesive/bridging 145 mechanisms of the base resin material and those of the reinforcing entities has been applied before in the published literature, not only for through-thickness reinforced laminates [12,22] but also for other material systems (i.e. fibre-reinforced brittle matrix composites, fibre-reinforced concrete, concrete) [23,24]. Thus, two fracture process zone lengths are considered.…”