犁耕颗粒介质中的波纹和剪切带
Ripples and Shear Bands in Plowed Granular Media
摘要：
干燥的空气流化粒状介质的单分散填料通常存在于$Φ$ = 0.585至0.64的体积分数之间。我们证明了颗粒阻力的动力学对$Φ$的体积分数是敏感的，并且在临界体积分数$Φ_{c}=0.605$处存在阻力和材料变形从光滑到振荡的转变。通过将浸没的钢板（3.81 cm宽，6.98 cm深）拖曳通过以0.585至0.635之间的体积分数制备的$300 μm$玻璃珠，我们发现，低于$Φ_{c}$的介质变形是平滑的和非局部的，而高于$Φ_{c}$的介质沿着明显的剪切带失效。在高$Φ$下，这些剪切带的产生是周期性的，从而导致表面上的波纹。由Burroughs Wellcome基金会和陆军研究实验室MAST CTA资助的工作
英文摘要：
Monodisperse packings of dry, air-fluidized granular media typically exist between volume fractions from $Φ$= 0.585 to 0.64. We demonstrate that the dynamics of granular drag are sensitive to volume fraction $Φ$ and their exists a transition in the drag force and material deformation from smooth to oscillatory at a critical volume fraction $Φ_{c}=0.605$. By dragging a submerged steel plate (3.81 cm width, 6.98 cm depth) through $300 μm$ glass beads prepared at volume fractions between 0.585 to 0.635 we find that below $Φ_{c}$ the media deformation is smooth and non-localized while above $Φ_{c}$ media fails along distinct shear bands. At high $Φ$ the generation of these shear bands is periodic resulting in the ripples on the surface. Work funded by The Burroughs Wellcome Fund and the Army Research Lab MAST CTA
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
