Research of Fracture Mechanics Applied in the Cutting Process of Plastic Metals Hongyan Shi, Xianfeng Zhao, Ziqin Wang, Xueting Jiang, Zichuan Zou and Xiaolong Hu JNWPU, 37 6 (2019) 1209-1222 Published online: 11 February 2020 DOI: 10.1051/jnwpu/20193761209