Finite element cohesive fracture modeling of asphalt mixture based on the semi-circular bending (SCB) test and self-affine fractal cracks at low temperatures

2020 ◽  
Vol 169 ◽  
pp. 102916
Author(s):  
Ahmad Al-Qudsi ◽  
Augusto Cannone Falchetto ◽  
Di Wang ◽  
Stephan Büchler ◽  
Yun Su Kim ◽  
...  
Keyword(s):  
Finite Element ◽  
Low Temperatures ◽  
Asphalt Mixture ◽  
Cohesive Fracture ◽  
Scb Test ◽  
Fracture Modeling ◽  
Fractal Cracks

scholarly journals Fracture Behavior Analysis of Semi-Circular Bending Test

2019 ◽  
Vol 271 ◽  
pp. 03007
Author(s):  
David Renteria ◽  
Shadi Saadeh ◽  
Enad Mahmoud
Keyword(s):  
Fracture Behavior ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Bending Test ◽  
Random Generation ◽  
Crack Initiation And Propagation ◽  
Air Voids ◽  
Generation Technique ◽  
Initiation And Propagation ◽  
Scb Test

The objective of this paper is to investigate the effect of air voids on the fracture properties of asphalt mixtures using SCB test in Discrete Element Method (DEM). Superpave and Coarse Matrix High Binder (CMHB) mixtures gradation were used to generate the percentages of aggregate, mastic, and air voids within the specimens. Aggregates and air voids were randomly generated for each asphalt mixture case. Model results illustrate that the crack initiation and propagation is controlled by the location of the aggregate particles and air voids in the mixture. Additionally, the absence of air voids above the tip of the notch increases the stiffness of the sample and increase its resistance to failure. The novelty of using DEM and the random generation technique for generating numerical specimens proved to be a useful approach in investigating the properties of the mastic, aggregate and interface as they relate to fracture of asphalt mixtures.

The Analyses and Calculation for Thermal Stresses of SBR Modified Asphalt Pavement

2011 ◽  
Vol 243-249 ◽  
pp. 4112-4118
Author(s):  
Min Jiang Zhang ◽  
Gang Chen ◽  
Li Xia Hou ◽  
Li Ping Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Thermal Stresses ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
The Finite Element Method ◽  
Temperature Stresses ◽  
Modified Asphalt ◽  
Temperature Performance

Based on the viscoelasticity theory and the data of creep test, Burgers model was established, which was used to study the viscoelastic property of SBR asphalt mixtures, and the viscoelastic constitutive relation was obtained. Using the finite element method, the temperature stresses field was calculated under the environmental conditions and the thermal stresses of SBR modified asphalt pavement was given at the last part of this paper. The study indicated that SBR modified asphalt mixtures have the advantage over common asphalt mixture in low-temperature performance.

Review of advances in micromechanical modeling of aggregate–aggregate interactions in asphalt mixtures

2007 ◽  
Vol 34 (2) ◽  
pp. 239-252 ◽  
Author(s):  
Zhanping You ◽  
Qingli Dai
Keyword(s):  
Finite Element ◽  
Particle Interaction ◽  
Asphalt Mixture ◽  
Complex Mixture ◽  
Element Model ◽  
Laboratory Simulation ◽  
Micromechanical Modeling ◽  
Discrete Elements ◽  
Interacting Particles ◽  
Work Done

This paper presents a comprehensive review of the work done by a number of researchers on the modeling of asphalt mixture. Included are some of the earliest models such as those with non-interacting particles (models with and without geometry specified), models with particle interaction, and some new models developed in recent years. The paper focuses on the description and comparison of the most recently developed finite element network model (FENM), a clustered discrete element model (DEM), and a micromechanical finite element model (FEM) used in micromechanical modeling of asphalt mixture. These models consider the complex mixture microstructure and aggregate–aggregate interaction. These models are demonstrated and applications of the advances are provided, where virtual laboratory simulation and laboratory tests were employed. The feasibility of nanotechnology application in asphalt mixture is also briefly discussed.Key words: micromechanical modeling, micromechanics, aggregate–aggregate interaction, finite elements, discrete elements, asphalt mixture.

Fatigue Experiments of Simulating Propagating Process of Reflective Cracking in Asphalt Concrete Overlays

2012 ◽  
Vol 193-194 ◽  
pp. 1454-1460
Author(s):  
Ying Mei Yin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Asphalt Mixture ◽  
Propagation Speed ◽  
Asphalt Mixtures ◽  
Rigid Base ◽  
Reflective Cracking ◽  
Analysis Model ◽  
Element Analysis ◽  
Resistance Performance

In order to simulate reflective cracking of asphalt overlays or semi-rigid asphalt pavements in lab and evaluate the reflective crack resistance performance of with and without interlayer, a finite element analysis model based on the asphalt pavement, of which the semi-rigid base has cracked, is conducted and established through some basic assumptions in this paper. According to the results of pavement mechanical analysis and some literatures review, a laboratory reflective cracking simulation model was designed to compare the resistances of reflective cracking of different mixture samples. In order to compare the reflective cracking of different test samples, a dense grade asphalt mixture AC-20I with and without interlayer were used in the test. The results shows that asphalt mixture beams containing geotechnical fabrics can effectively delay the appearance of the reflective cracking at the bottom of the asphalt mixture beam and evidently reduce the propagation speed of reflective cracking while the beams containing geogrid can also hold back reflective cracking to a certain extent, but not as much as geotechnical fabrics did. It was proved that the model designed through finite element analysis (FEA) can simulate the reflective cracking caused by load and evaluate the reflective cracking resistance performance of different asphalt mixtures well and asphalt mixtures with fabrics can mitigate and delay reflective cracking effectively.

scholarly journals Multi-levelhp-adaptivity for cohesive fracture modeling

2016 ◽  
Vol 109 (13) ◽  
pp. 1723-1755 ◽  
Author(s):  
Nils Zander ◽  
Martin Ruess ◽  
Tino Bog ◽  
Stefan Kollmannsberger ◽  
Ernst Rank
Keyword(s):  
Cohesive Fracture ◽  
Fracture Modeling
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