Aging-Induced Dynamics for Statically Indeterminate System

Abstract

Statically indeterminate systems are experimentally demonstrated to be in fact dynamical at the microscopic scale. Take the classic ladder-wall problem, for instance. Depending on the Young's modulus of the wall, it may take up to twenty minutes before its weight saturates. This finding is shown to be shared by other statically indeterminate systems, such as a granule silo and a beam with three support points. We believe that the aging effect is responsible for this surprising phenomenon because it can be correlated with the evolution of microscopic contact area with the wall and floor. Finally, a heuristic and simple method is introduced that can uniquely determine and analytically solve the saturated weight without invoking detailed material properties.

arXiv comment5 pages, 5 figures

References in corpus (6)

• Solid Friction from stick-slip to pinning and aging
• Photoelastic force measurements in granular materials
• Pressure screening and fluctuations at the bottom of a granular column
• Reverse Janssen effect in narrow granular columns
• Shear Destruction of Frictional Aging and Memory
• Influences of microcontact shape on the state of a frictional interface