Two-phase nonlocal integral model with bi-Helmholtz kernel for free vibration analysis of multi-walled carbon nanotubes considering size-dependent van der Waals forces

Chang LI, Rongjun CHEN, Cheng LI, Hai QING

Applied Mathematics and Mechanics (English Edition) . 2025, (11): 2095 -2114 . DOI: 10.1007/s10483-025-3313-8