Multiscale Modeling of Bituminous Mixtures Considering Material Viscoelasticity and Cohesive Zone Fracture

2010 ◽  
Author(s):  
Yong-Rak Kim ◽  
Flavio V. Souza ◽  
Dallas N. Little
Keyword(s):  
Multiscale Modeling ◽  
Cohesive Zone ◽  
Bituminous Mixtures

The Introduction and Application of Cohesive Zone Model on Asphalt Concrete Fracture Behavior

2015 ◽  
Vol 744-746 ◽  
pp. 1320-1323
Author(s):  
Hua Zhang ◽  
Hai Wei Zhang ◽  
Feng Su
Keyword(s):  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Constitutive Relations ◽  
Ceramic Materials ◽  
Zone Model ◽  
Concrete Fracture ◽  
Future Directions ◽  
Bituminous Mixtures ◽  
Pavement Structures ◽  
Fragmentation Processes

The cohesive zone model (CZM) is being increasingly used to simulate fracture and fragmentation processes in metallic, polymeric, and ceramic materials and their composites. The CZM regards fracture as a gradual phenomenon in which separation takes place across an extended crack tip. This paper introduces the concept of CZM, the constitutive relations of CZM, the influence of the shape of the interface law and up-to-date applications of CZM to bituminous mixtures and pavement structures. Furthermore, some current challenges and the future directions to the modeling of fracture in bituminous materials and pavements are briefly discussed.

Damage modeling of bituminous mixtures considering mixture microstructure, viscoelasticity, and cohesive zone fracture

2010 ◽  
Vol 37 (8) ◽  
pp. 1125-1136 ◽  
Author(s):  
Yong-Rak Kim ◽  
Francisco T.S. Aragão ◽  
David H. Allen ◽  
Dallas N. Little
Keyword(s):  
Finite Element Method ◽  
Cohesive Zone ◽  
Laboratory Testing ◽  
Model Material ◽  
Fracture Properties ◽  
Model Simulations ◽  
Bituminous Mixtures ◽  
Technical Issues ◽  
Complete Failure ◽  
Fracture Damage

This paper describes the development and application of a computational modeling approach incorporated with pertinent laboratory testing that can be used to predict fracture damage performance of bituminous paving mixtures. In the model, material viscoelasticity, mixture microstructure, and cohesive zone fracture properties are implemented within a finite element method, which is intended to simulate nonlinear-inelastic microscale fracture and its propagation to complete failure in bituminous mixtures. The model is applied to different materials, and the resulting model simulations are compared to experimental results for model validation. With some limitations and technical issues to be overcome in the future, the model presented herein clearly demonstrates several advancements based on its features accounting for material viscoelasticity, heterogeneity, and cohesive zone fracture. Potentially, the model can provide significant savings in time and costs and can also be used to improve currently available design analysis tools.

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