Predicting Crack Growth in Viscoelastic Bitumen under a Rotational Shear Fatigue Load 1 Yuqing Zhang, PhD Lecturer in Highway Engineering Aston Institute of Materials Research School of Engineering and Applied Science Aston University Aston Triangle, Birmingham, B4 7ET, U.K. Phone: +44 (0) 121-204-3391, Email: [email protected] (Corresponding author) Yangming Gao, PhD Candidate Aston Institute of Materials Research School of Engineering and Applied Science Aston University Aston Triangle, Birmingham, B4 7ET, U.K. Phone: +44 (0) 121-204-3391, Email: [email protected] 1 This is an Accepted Manuscript of an article to be published by International Journal of Road Materials and Pavement Design. Access to the full text of the paper is available at https://doi.org/10.1080/14680629.2019.1635516