Department of Physics, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
J Synchrotron Radiat. 2010 Nov;17(6):817-20. doi: 10.1107/S0909049510035363. Epub 2010 Sep 16.
Synchrotron phase-contrast hard X-ray imaging is used to provide highly efficient direct visualization of landslide dynamics and granular flows in fully wet granular piles. High penetration capability and phase-contrast enhancement of hard X-rays offer marked advantages in the precise tracking of individual granular movements through a thick water medium. It is revealed that the stress accumulation follows a power-law evolution while the relaxation follows an exponential one. The onset of landslide emerges at the trade-off of the two evolutions.
同步辐射相衬硬 X 射线成像技术被用于提供高效的直接可视化手段，以便研究完全湿润的散粒体堆中滑坡动力学和颗粒流。硬 X 射线的高穿透能力和相衬增强效果在通过厚水介质精确跟踪单个颗粒运动方面具有显著优势。研究结果表明，在这两种演化过程中，应力积累遵循幂律演化，而松弛则遵循指数演化。滑坡的发生是这两种演化过程相互权衡的结果。
