Strength properties of a Drucker-Prager porous medium reinforced by rigid particles
In the present study,we investigate the strength properties of ductile porous materials reinforced by rigid particles.The microporous medium is constituted of a Drucker-Prager solid phase containing spherical voids; its behaviour is described by means of an elliptic criterion (issued from a modified secant moduli approach) whose corresponding support function is determined.The later is then implemented in a limit analysis approach in which a careful attention is paid for the contribution of the inclusion matrix-interface.This delivers parametric equations of the effective strength properties of the porous material reinforced by rigid particles.The predictions are compared to available results obtained by means of variationnal homogenization methods successively applied for micro-to-meso and then for meso-to-macro scales transitions.Moreover,we discuss in detail the predictions of the material strength under isotropic mechanical loadings.To this end,additional static solutions are derived and compared to the kinematics limit analysis ones.Finally,we derive an approximate closed-form expression of the macroscopic strength which proves to be very accurate.
Porous Strength Drucker-Prager inclusion-matrix,interfaces
Zheng He Luc Dormieux Kondo Djimedo
E.N.P.C,Institut Navier,77455 Marne-la-Vallee,France U.M.P.C,Institut d’Alembert,75252 PARIS CEDEX 05,France
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）