TY - JOUR
T1 - Finite element cohesive fracture modeling of asphalt mixture based on the semi-circular bending (SCB) test and self-affine fractal cracks at low temperatures
AU - Al-Qudsi, Ahmad
AU - Cannone Falchetto, Augusto
AU - Wang, Di
AU - Büchler, Stephan
AU - Kim, Yun Su
AU - Wistuba, Michael P.
N1 - Funding Information:
Financial support of the German Federal Ministry of Transportation for project No. FE 07.0290/2016/ERB (POTEA) is gratefully acknowledged.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/1
Y1 - 2020/1
N2 - Thermal cracking is one of the most common distresses for asphalt pavement constructed in the cold regions. In order to address this issue, the combined use of fracture mechanics-based tests and simulation is a solid option. First, asphalt mixture samples are prepared based on the German standard and the low temperature strength are measured by Semi-Circular Bending (SCB) test and the Uniaxial Creep (UC) test at three different temperatures: −6, −12 and −18 °C. Next, experimental test results are used to perform the cohesive zone (CZ) modeling by using a two-dimensional finite element (FE) simulation. As a new approach, the CZ is modeled along a self-affine crack path, which allows performing a simulation closer to reality. The FE results provide a comprehensive understanding of the mechanism of crack initiation and propagation while keeping the computational time within a reasonable level.
AB - Thermal cracking is one of the most common distresses for asphalt pavement constructed in the cold regions. In order to address this issue, the combined use of fracture mechanics-based tests and simulation is a solid option. First, asphalt mixture samples are prepared based on the German standard and the low temperature strength are measured by Semi-Circular Bending (SCB) test and the Uniaxial Creep (UC) test at three different temperatures: −6, −12 and −18 °C. Next, experimental test results are used to perform the cohesive zone (CZ) modeling by using a two-dimensional finite element (FE) simulation. As a new approach, the CZ is modeled along a self-affine crack path, which allows performing a simulation closer to reality. The FE results provide a comprehensive understanding of the mechanism of crack initiation and propagation while keeping the computational time within a reasonable level.
KW - Asphalt pavement
KW - Cohesive zone model
KW - Finite element method
KW - Fracture mechanics
KW - Low temperature properties
KW - Semi-circular bending (SCB)
KW - Uniaxial creep (UC)
KW - Viscoelasticity
UR - http://www.scopus.com/inward/record.url?scp=85073594321&partnerID=8YFLogxK
U2 - 10.1016/j.coldregions.2019.102916
DO - 10.1016/j.coldregions.2019.102916
M3 - Article
AN - SCOPUS:85073594321
SN - 0165-232X
VL - 169
JO - Cold Regions Science and Technology
JF - Cold Regions Science and Technology
M1 - 102916
ER -