Helically-driven granular mobility and gravity-variant scaling relations. Issue 22 (23rd April 2019)

• Record Type: Journal Article
• Authors: Thoesen, Andrew; McBryan, Teresa; Marvi, Hamidreza
• Is Part Of: RSC advances. Volume 9:Issue 22(2019)
• Page Start: 12572
• Page End: 12579
• Publication Date: 2019-04-23
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra00399a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : This study discusses the role and function of helical design as it relates to slippage during translation of a vehicle in glass bead media. Abstract : This study discusses the role and function of helical design as it relates to slippage during translation of a vehicle in glass bead media. We show discrete element method (DEM) and multi-body dynamics (MBD) simulations and experiments of a double-helix Archimedes screw propelled vehicle traveling in a bed of soda-lime glass beads. Utilizing granular parameters from the literature and a reduced Young's modulus, we validate the set of granular parameters against experiments. The results suggest that MBD-DEM provides reliable dynamic velocity estimates. We provide the glass, ABS, and glass–ABS simulation parameters used to obtain these results. We also examine recently developed granular scaling laws for wheels applied to these shear-driven vehicles under three different simulated gravities. The results indicate that the system obeys gravity granular scaling laws for constant slip conditions but is limited in each gravity regime when slip begins to increase.