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In the present letter a method to find a proper expression for the forcedistribution inside a granular sample in static equilibrium is proposed. Themethod is based in statistical mechanics and the force distribution is obtainedby studying how the potential elastic energy is divided among the differentcontacts between grains. It is found with DEM simulations with spheres that theelastic potential energy distribution follows a Bose Einstein law from whichthe force distribution is deduced. The present letter open a way in whichgranular materials can be studied with the tools provided by statisticalmechanics.

Force distribution in granular media studied by an energy method based on statistical mechanics