A special issue "Emerging Trends in Discrete-based Modeling and Characterization of Geotechnics" which was edited by TC105 members, Catherine O'Sullivan (Imperial College) and Jidong Zhao (Hong Kong University of Science and Technology), is available from this Computers and Geotechnics website.
https://www.sciencedirect.com/journal/computers-and-geotechnics/special-issue/10CJCNXXL1G
The special issue is a collection of papers extended from some works presented at the 8th International Conference on Discrete Element Methods, which took place at the University of Twente, Netherlands, in 21st-26th July 2019.