Cohesive zone modeling of fracture in asphalt concrete

Title: Cohesive zone modeling of fracture in asphalt concrete
Author(s): G. H. Paulino, S. H. Song, W. G. Buttlar
Paper category : conference
Book title: Fifth International RILEM Conference on Reflective Cracking in Pavements
Editor(s): C. Petit, I.L. Al-Qadi and A. Millien
Print-ISBN: 2-912143-47-0
e-ISBN: 2912143764
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 63 - 70
Total Pages: 8
Nb references: 16
Language: English

Abstract: This paper describes the development of a cohesive zone fracture model to simulate crack initiation and propagation in asphalt concrete. The cohesive zone modeling approach involves the use of intrinsic constitutive laws to connect traditional finite elements to simulate localized damage and softening behavior. The model presented has the ability to simulate complex fracture behavior, such as crack nucleation, crack initiation, and non-prescribed mixed-mode crack propagation, and can capture complex fracture process zone phenomena. The present model allows physical modeling of fracture, where both finite material strength and fracture energy are considered in an intrinsic separation law. This paper also describes the simulation of laboratory test specimens to calibrate the cohesive zone model parameters. The calibrated model is shown to compare favorably to single-edge notched beam fracture tests. The calibrated parameters were then used to simulate crack propagation in the indirect tension test (IDT) with reasonable success. Ongoing work to implement viscoelastic, rate-dependent and mixed-mode fracture capabilities should lead to even better simulation results in the near future.

Online publication: 2004-04-15
Publication type : full_text
Public price (Euros): 0.00