Shape or friction? Which of these characteristics drives the shear strength in granular systems?Theechalit Binaree, Emilien Azéma, Nicolas Estrada, Mathieu Renouf and Itthichai PreechawuttipongEPJ Web Conf., 249 (2021) 06008DOI: https://doi.org/10.1051/epjconf/202124906008