Date of this Version
Published in International Journal of Pavement Engineering 12:4 (August 2011), pp. 343–356; doi: 10.1080/10298436.2011.575138.
Cohesive zone (CZ) modeling has been receiving increasing attention from the asphaltic materials and pavement mechanics community as a mechanistic approach to model crack initiation and propagation in materials and structures. The CZ model provides a powerful and efficient tool that can be easily implemented in existing computational methods for brittle, quasi-brittle, and ductile failure as well as interfacial fracture, all of which are frequently observed in asphaltic materials. Accordingly, this paper introduces the CZ modeling approach in the form of a state-of-the-art review addressing the concept of CZ modeling, CZ constitutive relations, their implementation into computational methods, and up-to-date applications of CZ modeling to bituminous mixtures and pavement structures. This paper also includes a brief discussion on the current challenges that researchers face and the future directions to the modeling of fracture in bituminous materials and pavements. CZ modeling is not a topic that can be possibly discussed in a single article; therefore, it should be clearly noted that this review primarily attempts to deliver some of the core aspects of CZ modeling in the area of bituminous composites.