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

被引：42

作者：

Al-Qudsi, Ahmad ^{[1
]}

Falchetto, Augusto Cannone ^{[1
,2
]}

Wang, Di ^{[1
]}

Buechler, Stephan ^{[1
]}

Kim, Yun Su ^{[1
]}

Wistuba, Michael P. ^{[1
]}

机构：

[1] Tech Univ Carolo Wilhelmina Braunschweig, Dept Civil Engn ISBS, D-38106 Braunschweig, Germany

[2] Univ Alaska Fairbanks, Dept Civil & Environm Engn, Fairbanks, AK 99775 USA

来源：

COLD REGIONS SCIENCE AND TECHNOLOGY | 2020年 / 169卷

关键词：

Asphalt pavement; Fracture mechanics; Semi-circular bending (SCB); Uniaxial creep (UC); Cohesive zone model; Finite element method; Viscoelasticity; Low temperature properties; RESISTANCE; STRENGTH; FRICTION; SURFACES; ZONE;

D O I：

10.1016/j.coldregions.2019.102916

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 degrees 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.

引用

页数：7

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