Crack propagation pattern of the petal teeth of the cardan universal joint for screw drilling tools
LIU Shujie, MA Chuanhua, YE Daohui, XIAO Ping, GUAN Qinqin, ZHANG Ruiyao
Special Oil & Gas Reservoirs . 2025, (3): 168 -174 .  DOI: 10.3969/j.issn.1006-6535.2025.03.020