7 research outputs found

    Identification strategy of anisotropic behavior laws: application to thin sheets of Aluminium A5

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    Numerical simulation provides a valuable assistance in the controlling of forming processes. The elasto-plastic orthotropic constitutive law is based on the choice of an equivalent stress, a hardening law and a plastic potential. An identification of the model parameters from an experimental database is developed. This database consists in hardening curves and Lankford coefficients of specimens subjected to off-axis tensile tests. The proposed identification strategy is applied to aluminum sheets. The behavior of this material is studied under several solicitations. The anisotropic behavior of the aluminum plate is modeled using the Barlat criterionand the hardening law. The obtained Lankford coefficients are compared to those which are identified by a different strategy

    Anurie obstructive par «fungus balls» : A propos de 3 cas

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    Les «fungus balls» sont une cause rare d\'obstruction du haut appareil urinaire. Moins de 60 cas ont été rapportés dans la littérature. Nous décrivons trois cas d\'anurie obstructive secondaire à une infection candidosique du haut appareil urinaire. Le premier est survenu chez une greffée du rein, le deuxième chez un patient diabétique et le troisième chez un insuffi sant rénal chronique. Le traitement consiste en un drainage des urines, l\'identifi cation de l\'agent infectieux et le traitement antifongique approprié African Journal of Urology Vol. 14 (1) 2008: pp. 43-4
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