Zhenkun Li

TL;DR: In this paper, the size-dependent elasticity of a series of nickel cantilever microbeams was investigated experimentally for the first time, and the experimental results revealed that the dimensionless natural frequencies of the cantilevers increase to about 2.1 times with the beam thickness decreasing from 15-2.1 μm.

TL;DR: In this article, a standard experimental method for determining the intrinsic material length scale of modified couple stress theory is proposed based on a non-contact laser Doppler vibration measurement system, where the first-order resonant frequencies of two different cantilever microbeams made of copper and titanium with thickness ranging from 15 to 2

TL;DR: In this article, a nonlocal strain gradient theory developed from nonlocal theory was proposed for carbon nanotube in which axial velocity and the velocity gradient effect were separately considered on the basis of newly proposed nonlocal gradient theory.

TL;DR: In this article, a significant strain gradient effect is confirmed in wire torsion by electropolishing the wires with an initial diameter of 50μm at room temperature for different time periods.

TL;DR: In this paper, a non-contact dynamic vibration measurement system is built to test the fundamental linear frequency and the nonlinear amplitude-frequency curves near the primary resonance, and the effects of different order nonlinear terms, length scale parameter and damping coefficients on the system are investigated.