Nonlinear Classical Elasticity Model for Materials with Fluid and Matrix Phases Muñoz Beltrán, Rafael Melchor, Juan discern material damage WAVE SPECTROSCOPY NEWS TECHNIQUES Materials with fluid and matrix phases present different acoustic responses in each phase. While longitudinal waves propagate in both phases, shear waves do it only through the solid matrix. Longitudinal waves are mainly described by volumetric propagation and shear waves by deviatoric processes. In the case of nonlinear propagation cross effects occur between both components. This paper presents a new classical nonlinear model proposing a constitutive equation that separates volumetric and deviatoric effects. Four nonlinear constants of third order are defined. The formulation is compared to constitutive equations with Landau constants for weakly elasticity and both types of nonlinear constants related. Some reinterpretation of the Landau's constants arises in terms of parallel or cross nonlinear effects between volumetric and deviatoric components. 2019-10-07T11:11:41Z 2019-10-07T11:11:41Z 2018 info:eu-repo/semantics/article Muñoz, R., & Melchor, J. (2018). Nonlinear Classical Elasticity Model for Materials with Fluid and Matrix Phases. Mathematical Problems in Engineering, 2018. http://hdl.handle.net/10481/57250 10.1155/2018/5049104 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España MATHEMATICAL PROBLEMS IN ENGINEERING