Jiang Jin-Wu
Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200072, People's Republic of China.
Sci Rep. 2015 Jan 15;5:7814. doi: 10.1038/srep07814.
The Euler buckling theory states that the buckling critical strain is an inverse quadratic function of the length for a thin plate in the static compression process. However, the suitability of this theory in the dynamical process is unclear, so we perform molecular dynamics simulations to examine the applicability of the Euler buckling theory for the fast compression of the single-layer MoS2. We find that the Euler buckling theory is not applicable in such dynamical process, as the buckling critical strain becomes a length-independent constant in the buckled system with many ripples. However, the Euler buckling theory can be resumed in the dynamical process after restricting the theory to an individual ripple in the buckled structure.
欧拉屈曲理论指出，在静态压缩过程中，薄板的屈曲临界应变是长度的反二次函数。然而，该理论在动态过程中的适用性尚不清楚，因此我们进行分子动力学模拟，以检验欧拉屈曲理论对单层MoS₂快速压缩的适用性。我们发现，欧拉屈曲理论在这种动态过程中并不适用，因为在具有许多波纹的屈曲系统中，屈曲临界应变成为与长度无关的常数。然而，在将该理论限制在屈曲结构中的单个波纹后，欧拉屈曲理论在动态过程中可以恢复。
