A constitutive model of the porous media based on micro-mechanics damage

This paper is based on the damage constitutive model inDamage Theory Based Dynamic Analysis of Porous Media' a paper written by the authors and is from further results of the model that has been studied extensively. Firstly,the linking method and principle between damage constitutive law of porous media and micro damage variables are discussed.A nonlinear elastic damage constitutive model is deduced by computer numerical analyses.Secondly,based on Gurson's works,an elastic plastic constitutive model of the porous media matrix yield to Drucker Prager formula is derived.Finally,damage variable defined as the crack density parameter,and J 2 of deviator stress plan is amended,then an elastic plastic damage constitutive model of soil is derived.1fig.,15refs.