The paper is devoted to a numerical Limit Analysis of a hollow spheroidal model with a Drucker–Prager solid matrix, for several values of the corresponding friction angle ϕ. In the first part of this study, the static and the mixed kinematic 3D-codes recently evaluated in [1] are modified to use the geometry defined in [2] for spheroidal cavities in the context of a von Mises matrix. The results in terms of macroscopic criteria are satisfactory for low and medium values of ϕ, but not enough for in the highly compressive part of the criterion. To improve these results, an original mixed approach, dedicated to the axisymmetric case, was elaborated with a specific discontinuous quadratic velocity field associated with the triangular finite element. Despite the less good conditioning inherent to the axisymmetric modelization, the resulting conic programming problem appears quite efficient, allowing one take into account numerical discretization refinements unreachable with the corresponding 3D mixed code. After a first validation in the case of spherical cavities whose exact solution is known, the final results for spheroidal voids are given for three usual values of the friction angle and two values of the cavity aspect factor.
Accepté le :
Publié le :
Franck Pastor 1 ; Djimedo Kondo 2
@article{CRMECA_2014__342_2_96_0, author = {Franck Pastor and Djimedo Kondo}, title = {Limit analysis and lower/upper bounds to the macroscopic criterion of {Drucker{\textendash}Prager} materials with spheroidal voids}, journal = {Comptes Rendus. M\'ecanique}, pages = {96--105}, publisher = {Elsevier}, volume = {342}, number = {2}, year = {2014}, doi = {10.1016/j.crme.2013.12.002}, language = {en}, }
TY - JOUR AU - Franck Pastor AU - Djimedo Kondo TI - Limit analysis and lower/upper bounds to the macroscopic criterion of Drucker–Prager materials with spheroidal voids JO - Comptes Rendus. Mécanique PY - 2014 SP - 96 EP - 105 VL - 342 IS - 2 PB - Elsevier DO - 10.1016/j.crme.2013.12.002 LA - en ID - CRMECA_2014__342_2_96_0 ER -
%0 Journal Article %A Franck Pastor %A Djimedo Kondo %T Limit analysis and lower/upper bounds to the macroscopic criterion of Drucker–Prager materials with spheroidal voids %J Comptes Rendus. Mécanique %D 2014 %P 96-105 %V 342 %N 2 %I Elsevier %R 10.1016/j.crme.2013.12.002 %G en %F CRMECA_2014__342_2_96_0
Franck Pastor; Djimedo Kondo. Limit analysis and lower/upper bounds to the macroscopic criterion of Drucker–Prager materials with spheroidal voids. Comptes Rendus. Mécanique, Volume 342 (2014) no. 2, pp. 96-105. doi : 10.1016/j.crme.2013.12.002. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2013.12.002/
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