Modelling crack initiation in bituminous binders under a rotational shear fatigue load

Abstract

This study aims to model fatigue crack initiation in bituminous binders. An energy-based crack initiation criterion is developed for bitumen under a rotational shear fatigue load. Based on a damage mechanics analysis of fatigue cracking process, the crack initiation is defined and local energy redistribution around crack tips due to ‘factory-roof’ cracking is quantified. A quantitative energy criterion is proposed for the fatigue crack initiation in the bitumen using viscoelastic Griffith’s theory. The crack initiation criterion is validated through comparing the predicted and measured surface energy of the bitumen. The results show that bitumen fatigue cracking under the rotational shear fatigue load can be divided into two stages: the edge flow damage and the ‘factory-roof’ cracking. The crack initiation is dependent of the shear modulus and surface energy of bituminous binders, critical crack size, and loading amplitude. The energy-based crack initiation criterion along with the DSR fatigue tests can be potentially used to determine the material surface energy.

Publication DOI: https://doi.org/10.1016/j.ijfatigue.2020.105738
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Engineering Systems and Supply Chain Management
College of Engineering & Physical Sciences
Additional Information: © 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/. Funding: The authors would like to acknowledge the financial support provided by European Union’s Horizon 2020 programme via a Marie S. Curie Individual Fellowship project (Grant No. 789551)
Uncontrolled Keywords: Dynamic shear rheometer (DSR),Energy-based crack initiation criterion,Surface energy,Time sweep,Viscoelastic Griffith's theory,Modelling and Simulation,Materials Science(all),Mechanics of Materials,Mechanical Engineering,Industrial and Manufacturing Engineering
Publication ISSN: 0142-1123
Last Modified: 17 Jun 2024 07:49
Date Deposited: 29 May 2020 08:55
Full Text Link:
Related URLs: http://www.scie ... 142112320302693 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2020-10
Published Online Date: 2020-05-27
Accepted Date: 2020-05-25
Authors: Gao, Yangming
Li, Linglin (ORCID Profile 0000-0001-8418-1491)
Zhang, Yuqing (ORCID Profile 0000-0001-5825-0131)

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