M. M. Frocht, Photoelasticity: The Selected Scientific Papers of MM Frocht, vol.2, 1969.

G. Cloud, , pp.55-56, 1995.

K. E. Daniels, J. E. Kollmer, and J. G. Puckett, Photoelastic force measurements in granular materials, Rev. Sci. Instrum, vol.88, issue.5, p.51808, 2017.

M. Cox, D. Wang, J. Barés, and R. P. Behringer, Self-organized magnetic particles to tune the mechanical behavior of a granular system, Europhys. Lett, vol.115, issue.6, p.64003, 2016.
URL : https://hal.archives-ouvertes.fr/hal-01394287

T. Wakabayashi, Photo-elastic method for determination of stress in powdered mass, J. Phys. Soc. Jpn, vol.5, issue.5, pp.383-385, 1950.

P. Dantu, Proceedings of the 4th international conference on soil mechanics and foundations engineering, 1957.

A. Drescher and G. De-jong-de-josselin, Photoelastic verification of a mechanical model for the flow of a granular material, J. Mech. Phys. Solids, vol.20, issue.5, pp.337-340, 1972.

C. H. Liu, S. R. Nagel, D. A. Schecter, S. N. Coppersmith, S. Majumdar et al., Force fluctuations in bead packs, Science, vol.269, issue.5223, pp.513-515, 1995.

D. Howell, R. P. Behringer, and C. Veje, Stress fluctuations in a 2d granular couette experiment: a continuous transition, Phys. Rev. Lett, vol.82, issue.26, p.5241, 1999.

T. S. Majmudar and R. P. Behringer, Contact force measurements and stress-induced anisotropy in granular materials, Nature, vol.435, issue.7045, p.1079, 2005.

A. Amon, P. Born, K. E. Daniels, J. A. Dijksman, K. Huang et al., Preface: focus on imaging methods in granular physics, 2017.
URL : https://hal.archives-ouvertes.fr/hal-01534698

J. Barés, S. Mora, J. Delenne, and T. Fourcaud, Experimental observations of root growth in a controlled photoelastic granular material, EPJ Web of Conferences, vol.140, p.14008, 2017.

J. E. Kollmer, Photoelastic grain solver (pegs, 2018.

O. Lantsoght and N. Docquier, Photoelastic grain solver with pyhton (pegspy, 2018.

J. Barés, D. Wang, D. Wang, T. Bertrand, C. S. O'hern et al., Local and global avalanches in a two-dimensional sheared granular medium, Phys. Rev. E, vol.96, issue.5, p.52902, 2017.

A. Abed-zadeh, J. Barés, J. Socolar, and R. P. Behringer, Seismicity in sheared granular matter, 2018.

J. Geng, D. Howell, E. Longhi, R. P. Behringer, G. Reydellet et al., Footprints in sand: the response of a granular material to local perturbations, Phys. Rev. Lett, vol.87, issue.3, p.35506, 2001.

J. Zhang, T. S. Majmudar, A. Tordesillas, and R. P. Behringer, Statistical properties of a 2d granular material subjected to cyclic shear, Granul. Matter, vol.12, issue.2, pp.159-172, 2010.

T. S. Majmudar, M. Sperl, S. Luding, and R. P. Behringer, Jamming transition in granular systems, Phys. Rev. Lett, vol.98, issue.5, p.58001, 2007.

D. Bi, J. Zhang, B. Chakraborty, and R. P. Behringer, Jamming by shear, Nature, vol.480, pp.355-358, 2011.

J. Ren, J. A. Dijksman, and R. P. Behringer, Reynolds pressure and relaxation in a sheared granular system, Phys. Rev. Lett, vol.110, issue.1, p.18302, 2013.

H. Zheng, J. A. Dijksman, and R. P. Behringer, Shear jamming in granular experiments without basal friction, Europhys. Lett.), vol.107, issue.3, p.34005, 2014.

D. Wang, J. Ren, J. A. Dijksman, H. Zheng, and R. P. Behringer, Microscopic origins of shear jamming for 2d frictional grains, Phys. Rev. Lett, vol.120, p.208004, 2018.

A. H. Clark, L. Kondic, and R. P. Behringer, Particle scale dynamics in granular impact, Phys. Rev. Lett, vol.109, issue.23, p.238302, 2012.

M. X. Lim, J. Barés, H. Zheng, and R. P. Behringer, Force and mass dynamics in non-Newtonian suspensions, Phys. Rev. Lett, vol.119, issue.18, p.184501, 2017.
URL : https://hal.archives-ouvertes.fr/hal-01669033

H. Zheng, D. Wang, D. Z. Chen, M. Wang, and R. P. Behringer, Intruder friction effects on granular impact dynamics, Phys. Rev. E, vol.98, p.32904, 2018.

I. Zuriguel and T. Mullin, The role of particle shape on the stress distribution in a sandpile, Proc. R. Soc. A: Math. Phys. Eng. Sci, vol.464, pp.99-116, 2008.

S. Lherminier, R. Planet, G. Simon, L. Vanel, and O. Ramos, Revealing the structure of a granular medium through ballistic sound propagation, Phys. Rev. Lett, vol.113, issue.9, p.98001, 2014.
URL : https://hal.archives-ouvertes.fr/hal-01727331

A. Shukla, Dynamic photoelastic studies of wave propagation in granular media, Opt. Lasers Eng, vol.14, issue.3, pp.165-184, 1991.

E. T. Owens and K. E. Daniels, Sound propagation and force chains in granular materials, Europhys. Lett, vol.94, issue.5, p.54005, 2011.

G. Huillard, X. Noblin, and J. Rajchenbach, Propagation of acoustic waves in a one-dimensional array of noncohesive cylinders, Phys. Rev. E, vol.84, p.16602, 2011.
URL : https://hal.archives-ouvertes.fr/hal-00625668

J. G. Puckett and K. E. Daniels, Equilibrating temperaturelike variables in jammed granular subsystems, Phys. Rev. Lett, vol.110, issue.5, p.58001, 2013.

E. S. Bililign, J. E. Kollmer, and K. E. Daniels, Protocol dependence and state variables in the force-moment ensemble, Phys. Rev. Lett, vol.122, issue.3, p.38001, 2019.

J. Kollmer and K. Daniels, Betweenness centrality as predictor for forces in granular packings, Soft Matter, 2018.

C. Coulais, A. Seguin, and O. Dauchot, Shear modulus and dilatancy softening in granular packings above jamming, Phys. Rev. Lett, vol.113, p.198001, 2014.
URL : https://hal.archives-ouvertes.fr/hal-01422381

N. Iikawa, M. M. Bandi, and H. Katsuragi, Sensitivity of granular force chain orientation to disorder-induced metastable relaxation, Phys. Rev. Lett, vol.116, issue.12, p.128001, 2016.

N. Mahabadi and J. Jang, The impact of fluid flow on force chains in granular media, Appl. Phys. Lett, vol.110, issue.4, p.41907, 2017.

D. M. Wendell, K. Luginbuhl, J. Guerrero, and A. E. Hosoi, Experimental investigation of plant root growth through granular substrates, Exp. Mech, vol.52, issue.7, pp.945-949, 2012.

E. Kolb, C. Hartmann, and P. Genet, Radial force development during root growth measured by photoelasticity, Plant Soil, vol.360, pp.19-35, 2012.

K. E. Daniels and N. W. Hayman, Force chains in seismogenic faults visualized with photoelastic granular shear experiments, J. Geophys. Res, vol.113, issue.B11, p.11411, 2008.

N. W. Hayman, L. Ducloué, K. L. Foco, and K. E. Daniels, Granular controls on periodicity of stick-slip events: kinematics and forcechains in an experimental fault, Pure Appl. Geophys, vol.168, issue.12, pp.2239-2257, 2011.

D. A. Geller, R. E. Ecke, K. A. Dahmen, and S. Backhaus, Stick-slip behavior in a continuum-granular experiment, Phys. Rev. E, vol.92, issue.6, p.60201, 2015.

S. Lherminier, R. Planet, V. Levy-dit-vehel, G. Simon, L. Vanel et al., Continuously sheared granular matter reproduces in detail seismicity laws, 2019.

A. Abed-zadeh, J. Barés, T. Brzinski, K. E. Daniels, J. Dijksman et al., Photoelastic methods wiki, 2019.

T. S. Majmudar, Experimental Studies of Two-Dimensional Granular Systems Using Grain-Scale Contact Force Measurements, 2006.

, Clear flex?, castable urethane from smooth-on

D. Wang, Response of Granular Materials to Shear: Origins of Shear Jamming, Particle Dynamics, and Effects of Particle Properties, 2018.

, Mold star?, castable silicone from smooth-on

D. Kilcast, M. M. Boyar, and J. B. Hudson, Gelatin photoelasticity: a new technique for measuring stress distributions in gels during penetration testing, J. Food Sci, vol.49, issue.2, pp.654-655, 1984.

M. Workamp, S. Alaie, and J. A. Dijksman, What is fluidity? Designing an experimental system to probe stress and velocity fluctuations in flowing suspensions, EPJ Web of Conferences, vol.140, p.3020, 2017.

R. A. Tomlinson and Z. A. Taylor, Photoelastic materials and methods for tissue biomechanics applications, Opt. Eng, vol.54, issue.8, p.81208, 2015.

L. H. Damink, P. J. Dijkstra, M. J. Van-luyn, P. B. Van-wachem, P. Nieuwenhuis et al., Glutaraldehyde as a crosslinking agent for collagen-based biomaterials, J. Mater. Sci. Mater. Med, vol.6, issue.8, pp.460-472, 1995.

M. Workamp, S. Alaie, and J. A. Dijksman, Coaxial air flow device for the production of millimeter-sized spherical hydrogel particles, Rev. Sci. Instrum, vol.87, issue.12, p.125113, 2016.

S. Lherminier, R. Planet, G. Simon, M. Måløy, L. Vanel et al., A granular experiment approach to earthquakes, Rev. Cubana Fís, vol.33, issue.1, pp.55-58, 2016.

. Veroclear?,

L. Wang, Y. Ju, H. Xie, G. Ma, L. Mao et al., The mechanical and photoelastic properties of 3d printable stress-visualized materials, Sci. Rep, vol.7, issue.1, p.10918, 2017.

Y. Zhao, J. Barés, H. Zheng, and R. P. Behringer, Tuning strain of granular matter by basal assisted couette shear, EPJ Web of Conferences, vol.140, p.3049, 2017.
URL : https://hal.archives-ouvertes.fr/hal-01499250

M. D. Shattuck, Experimental techniques, Handbook of Granular Materials, 2015.

T. Peng, A. Balijepalli, S. K. Gupta, and T. Lebrun, Algorithms for on-line monitoring of micro spheres in an optical tweezers-based assembly cell, J. Comput. Inf. Sci. Eng, vol.79, pp.330-338, 2007.

J. C. Crocker and D. G. Grier, Methods of digital video microscopy for colloidal studies, J. Colloid Interface Sci, vol.179, issue.1, pp.298-310, 1996.

D. Blair and E. Dufresne, Matlab particle tracking code repository

C. E. Willert and M. Gharib, Digital particle image velocimetry, Exp. Fluids, vol.10, issue.4, pp.181-193, 1991.

L. D. Landau and E. M. Lifshitz, Theory of elasticity, vol.7, p.109, 1986.

A. Abed-zadeh, J. Barés, and R. P. Behringer, Crackling to periodic dynamics in granular media, Phys. Rev. E, vol.99, issue.4, p.40901, 2019.

Y. Zhao, H. Zheng, D. Wang, M. Wang, and R. P. Behringer, Particle scale force sensor based on intensity gradient method in granular photoelastic experiments, New J. Phys, vol.21, p.23009, 2019.

T. S. Majmudar, Experimental studies of two-dimensional granular systems using grain-scale contact force measurements (Doctoral Dissertation), 2006.

S. Farhadi and R. Behringer, P: Dynamics of sheared ellipses and circular disks: effects of particle shape, Phys. Rev. Lett, vol.112, issue.14, p.148301, 2014.

S. Farhadi, A. Z. Zhu, and R. Behringer, P: Stress relaxation for granular materials near jamming under cyclic compression, Phys. Rev. Lett, vol.115, issue.18, p.188001, 2015.

N. Iikawa, M. M. Bandi, and H. Katsuragi, Structural evolution of a granular pack under manual tapping, J. Phys. Soc. Jpn, vol.84, issue.9, p.94401, 2015.

O. Lantsoght, Couplage entre dynamique multicorps et méthode des éléments discrets: modélisation et expérimentation. phdthesis, 2019.

S. Timoshenko and J. N. Goodier, Theory of Elasticity, 1970.

Z. Wang, A. C. Bovik, H. R. Sheikh, and E. P. Simoncelli, Image quality assessment: from error visibility to structural similarity, IEEE Trans. Image Process, vol.13, issue.4, pp.600-612, 2004.

P. Yu, S. Frank-richter, A. Börngen, and M. Sperl, Monitoring three-dimensional packings in microgravity, Granul. Matter, vol.16, issue.2, pp.165-173, 2014.

R. J. Mahon, J. A. Murphy, and W. Lanigan, Digital holography at millimetre wavelengths, Opt. Commun, vol.260, issue.2, pp.469-473, 2006.

M. S. Heimbeck, M. K. Kim, D. A. Gregory, and H. O. Everitt, Terahertz digital holography using angular spectrum and dual wavelength reconstruction methods, Opt. Express, vol.19, issue.10, pp.9192-9200, 2011.

H. O. Everitt, T. Tyler, B. D. Caraway, C. M. Bingham, A. Llopis et al., Strain sensing with metamaterial composites, Adv. Opt. Mater, vol.7, p.1801397, 2019.

A. L. Thomas and N. M. Vriend, Photoelastic study of dense granular free-surface flows, 2019.