title: Tensile Strength of Liquids: Equivalence of Temporal and Spatial Scales in Cavitation.
abstract: It is well known that strain rate and size effects are both important in material failure, but the relationships between them are poorly understood. To establish this connection, we carry out molecular dynamics (MD) simulations of cavitation in Lennard-Jones and Cu liquids over a very broad range of size and strain rate. These studies confirm that temporal and spatial scales play equivalent roles in the tensile strengths of these two liquids. Predictions based on smallest-scale MD simulations of Cu for larger temporal and spatial scales are consistent with independent simulations, and comparable to experiments on liquid metals. We analyze these results in terms of classical nucleation theory and show that the equivalence arises from the role of both size and strain rate in the nucleation of a daughter phase. Such equivalence is expected to hold for a wide range of materials and processes and to be useful as a predictive bridging tool in multiscale studies.
authors.affiliation: CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China , Hefei, Anhui 230027, P. R. China.
authors.forename: Y
authors.initials: Y
authors.lastname: Cai
authors.affiliation: CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China , Hefei, Anhui 230027, P. R. China.
authors.forename: J Y
authors.initials: JY
authors.lastname: Huang
authors.affiliation: CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China , Hefei, Anhui 230027, P. R. China.
authors.forename: H A
authors.initials: HA
authors.lastname: Wu
authors.affiliation: Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University , Chengdu, Sichuan 610031, P. R. China.
authors.forename: M H
authors.initials: MH
authors.lastname: Zhu
authors.affiliation: Materials and Process Simulation Center, California Institute of Technology , Pasadena, California 91125, United States.
authors.forename: W A
authors.initials: WA
authors.lastname: Goddard
authors.affiliation: Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University , Chengdu, Sichuan 610031, P. R. China.|The Peac Institute of Multiscale Sciences , Chengdu, Sichuan 610031, P. R. China.
authors.forename: S N
authors.initials: SN
authors.lastname: Luo