@article {276,
	title = {Some micromechanical aspects of failure in granular materials based on second-order work},
	journal = {Comptes Rendus M{\'e}canique},
	volume = {342},
	year = {2014},
	month = {Mar-2014},
	pages = {174 - 188},
	abstract = {<p>This paper discusses the notion of failure in a granular assembly by examining the key microstructural mechanisms which are most likely to trigger the nucleation and propagation of instabilities within a granular material. For this purpose, the key variable to predict the occurrence of failure, known as second-order work, is expressed from variables on the grain scale. The local behaviour incidents (where contacts may open or slide), compared to the global response of the assembly, are analysed by two approaches. First, numerical computations made by a discrete element model confirm the microscopic definition of the second-order work. Secondly, a micromechanical model, based on a homogenization procedure, relating the macroscopic behaviour to microscopic ingredients, namely contact planes, points to a close link between the occurrence of failure on the macroscopic scale as well as on the contact planes.</p>
},
	issn = {16310721},
	doi = {10.1016/j.crme.2014.01.006},
	author = {Fran{\c c}ois Nicot and Hadda, Nejib and Sibille, Luc and Farhang Radja{\"\i} and Hicher, Pierre-Yves and Darve, F{\'e}lix}
}
