Chapter 3. The Fictitious Crack Model and Its Numerical Implementation
3.1. Introduction
The presence of the fracture process zone (FPZ) in front of an open crack poses an analytical challenge in the framework of continuum solid mechanics for the study of concrete fracture because macroscopically this zone can be characterized neither as a continuous region nor as a discontinuous region. In fact, it is a partially damaged zone with some remaining stress-transferring capability through aggregate interlocking and various microcracking activities, and it functions like a transition zone between the open crack of complete discontinuity and the intact material of complete continuity beyond it. Since fracture of concrete originates in this zone, the ...
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