期刊论文

Wang, L.(wangliang0329@hunau.edu.cn)

英文

Journal of Applied Physics

0021-8979

2023

133

6

065103

10.1063/5.0128574

We acknowledge the support of Natural Science Foundation (NSF) of China (Grant No. 11802092), NSF of Hunan Province (Grant Nos. 2019JJ50221, 2019JJ40127, 2020JJ5260, and 2020JJ4375), the Funding of the Hunan Education Department Project (No. 20A248), the Double first-class construction project of Hunan Agricultural University (No. SYL2019063), and the computation platform of the National Super Computer Center in Changsha (NSCC). We also acknowledge the helpful discussion from X. Y. Liu at The Peac Institute of Multiscale Sciences (PIMS).

本校为第一机构

We systematically study the low cycle fatigue behavior and its dependence of specific surface area (ζ) for nanoporous copper (NPC) under ultrahigh strain rate (γ ˙ ≈ 10 9 s- 1) cyclic shear loading by conducting large-scale molecular dynamic simulation and small-angle x-ray scattering analysis. With an increase in ζ, NPC undergoes a transition from the first excellent anti-fatigue property (ζ < 1.24 nm - 1) to the subsequent easy-to-fatigue capacity (ζ ≥ 1.24 nm - 1). Two different mechanisms are governing fatigue: (i) smooth nucleation...