Investigation on Viscoelastic-Creep Behavior of the Phase-Field Crystal Method

[摘要] The phase-field crystal (PFC) method is a promising computational model with atomistic resolution and diffusive time-scale. In this study, we investigated the viscoelastic-creep behavior exhibited by the PFC model. We considered a one-dimensional crystal subjected to step changes in pressure and studied the time-dependent strain response from the system. The parametric study shows that the PFC model predicts the materials with higher density to exhibit higher stiffness and lower damping capacity while an increase in temperature results in lower stiffness and damping capacity. These predictions agree with experimental observations and show promising capability of the PFC method to model viscoelastic phenomena.

[发布机构] Department of Industrial Engineering, Faculty of Engineering, King Mongkut's Institute of Technology, Ladkrabang, Bangkok; 10520, Thailand^1

[效力级别] 无线电电子学

[关键词] Atomistic resolution;Computational model;One-dimensional crystals;Parametric study;Phase-field crystals;Stiffness and damping;Time-dependent strains;Viscoelastic creep