Numerical investigation on thermal–mechanical and fretting wear characteristics in typical region of three-petal fuel rods - Shusong Qin; Weijie Cai; Xiaoping Liu; Xiangfei Meng; Wentao Wu; Xunjian Che; Jianchuang Sun; Wenchao Zhang; Weihua Cai (Annals of Nuclear Energy, 2026)