@inbook{c3d66ec7fbde4729a557b629050969f2,
title = "Crack Evolution of Bitumen Under Torsional Shear Fatigue Loads",
abstract = "This study aims to model crack evolution in bitumen under a torsional shear fatigue load by dynamic shear rheometer (DSR). Fatigue crack length in the bitumen was predicted using a damage mechanics-based DSR cracking (DSR-C) model. The crack evolution is modelled using a pseudo J-integral based Paris{\textquoteright} law. Frequency weep tests and time sweep fatigue tests were conducted on an unmodified bitumen 40/60 and a polymer-modified bitumen X-70 at different temperatures, frequencies and loading amplitudes. Results demonstrate that the pseudo J-integral Paris{\textquoteright} law can accurately predict the crack evolution in the bitumen under the torsional shear fatigue load. A stiffer bitumen due to decreasing temperature has a smaller Paris{\textquoteright} law coefficient A and a greater exponent n, which proves that the fatigue crack grows faster at a lower temperature. The Paris{\textquoteright} law coefficients A and n are temperature-dependent fundamental material properties, which are independent of loading frequency or loading amplitude.",
keywords = "Bitumen, Crack evolution, Fatigue, Paris{\textquoteright} law, Pseudo J-integral",
author = "Yangming Gao and Linglin Li and Yuqing Zhang",
year = "2022",
doi = "10.1007/978-3-030-46455-4_61",
language = "English",
isbn = "978-3-030-46454-7",
series = "RILEM Bookseries",
pages = "481--487",
editor = "{Di Benedetto}, H. and H. Baaj and E. Chailleux and G. Tebaldi and C. Sauz{\'e}at and S. Mangiafico",
booktitle = "RILEM Bookseries",
}