Effect of Initial Granular Structure on the Evolution of Contact Force Chains

The effect of initial granular structural conditions on load transmission patterns was experimentally investigated. Two types of granular structures were prepared by laminating cylindrical model particles of different diameters, to which photoelastic sheets were attached. Two-dimensional, reflective photoelasticity tests were performed under two granular conditions: (1) a uniform structure without initial defects and (2) with initial local imperfections at the bottom of the granular assembly. Two granular assemblies were tested for uniaxial compressive loading and shallow foundation loading conditions. For macroscopic analyses of the load–displacement relationship, the photoelastic response of individual particles was measured to microscopically observe the distribution of the main contact force chains within each granular assembly. Furthermore, the effect of initial local defects on the bearing capacity of granular assemblies was examined by confirming particle movement and the expansion of initial local defects in the granular assembly via particle image velocimetry (PIV). As a result, a completely different form of internal contact force chain was developed from the beginning of loading to the final failure stage, depending upon whether or not initial local instability existed in the granular assembly. In particular, a significant effect on the bearing capacity was found under shallow foundation loading conditions.

[1]  Amy L. Rechenmacher,et al.  Evolution of force chains in shear bands in sands , 2010 .

[2]  Antoinette Tordesillas,et al.  Force chain buckling, unjamming transitions and shear banding in dense granular assemblies , 2007 .

[3]  M. Scafidi,et al.  RGB Photoelasticity: Review and Improvements , 2010 .

[4]  G. De Josselin de Jong,et al.  Étude photo-Élastique d’un empilement de disques , 2006 .

[5]  Colin Thornton,et al.  A numerical examination of shear banding and simple shear non-coaxial flow rules , 2006 .

[6]  K. Maeda,et al.  Stress-chain based micromechanics of sand with grain shape effect , 2010 .

[7]  M. Oda,et al.  Microstructure of shear bands and its relation to the mechanisms of dilatancy and failure of dense granular soils , 1998 .

[8]  M. Scafidi,et al.  RGB photoelasticity applied to the analysis of membrane residual stress in glass , 2012 .

[9]  Ka-Hyun Park,et al.  Quantitative Detection of Contact Force Chains in a Model Particle Assembly Using Digital RGB Photoelastic Measurements , 2020 .

[10]  W Losert,et al.  Microstructure evolution during impact on granular matter. , 2012, Physical review. E, Statistical, nonlinear, and soft matter physics.

[11]  Daogao Wei,et al.  Characteristics of force chains in frictional interface during abrasive flow machining based on discrete element method , 2018, Advances in Manufacturing.

[12]  F. Bourrier,et al.  Physical processes within a 2D granular layer during an impact , 2008 .

[13]  E. Aharonov,et al.  Stick-slip motion in simulated granular layers , 2004 .

[14]  M. E. Cates,et al.  Jamming and static stress transmission in granular materials. , 1999, Chaos.

[15]  J F Peters,et al.  Characterization of force chains in granular material. , 2005, Physical review. E, Statistical, nonlinear, and soft matter physics.

[16]  T. Majmudar,et al.  Contact force measurements and stress-induced anisotropy in granular materials , 2005, Nature.

[17]  C. H. Liu,et al.  Force Fluctuations in Bead Packs , 1995, Science.

[18]  Antoinette Tordesillas,et al.  Buckling force chains in dense granular assemblies: physical and numerical experiments , 2009 .

[19]  K. Daniels,et al.  Granular Controls on Periodicity of Stick-Slip Events: Kinematics and Force-Chains in an Experimental Fault , 2011 .

[20]  D. M. Walker,et al.  Force chain and contact cycle evolution in a dense granular material under shallow penetration , 2014 .

[21]  James G. Puckett,et al.  Photoelastic force measurements in granular materials. , 2016, The Review of scientific instruments.

[22]  Gaël Combe,et al.  Experimental micromechanical analysis of a 2D granular material: relation between structure evolution and loading path , 1997 .

[23]  Takao Wakabayashi Photo-elastic Method for Determination of Stress in Powdered Mass , 1950 .

[24]  Christian Veje,et al.  Stress Fluctuations in a 2D Granular Couette Experiment: A Continuous Transition , 1999 .

[25]  Sandro Barone,et al.  Towards RGB photoelasticity: Full-field automated photoelasticity in white light , 1995 .

[26]  Jean-Pierre Bardet,et al.  Observations on the effects of particle rotations on the failure of idealized granular materials , 1994 .

[27]  Amy L. Rechenmacher,et al.  Grain-scale processes governing shear band initiation and evolution in sands , 2006 .

[28]  Antoinette Tordesillas,et al.  How do interparticle contact friction, packing density and degree of polydispersity affect force propagation in particulate assemblies? , 2006 .

[29]  Antoinette Tordesillas,et al.  On the modeling of confined buckling of force chains , 2009 .

[30]  Massimo Pica Ciamarra,et al.  Shear instabilities in granular mixtures. , 2005, Physical review letters.

[32]  Raphael Blumenfeld Stresses in isostatic granular systems and emergence of force chains. , 2004, Physical review letters.

[33]  Fanxiu Chen,et al.  Mechanical analysis and force chain determination in granular materials using digital image correlation. , 2016, Applied optics.

[34]  S J Antony,et al.  Evolution of force distribution in three-dimensional granular media. , 2000, Physical review. E, Statistical, nonlinear, and soft matter physics.

[35]  R. Adrian Particle-Imaging Techniques for Experimental Fluid Mechanics , 1991 .

[36]  Joonyoung Kim,et al.  Model test assessment of the generation of underground cavities and ground cave-ins by damaged sewer pipes , 2019, Soils and Foundations.

[37]  Masanobu Oda,et al.  Effects of induced anisotropy on the development of shear bands in granular materials , 1998 .