Importance of Incremental Nonlinearity in the Deformation of Granular Materials

摘要: The property of incremental nonlinearity indicating that the tangent stiffness/ compliance depends on direction strain/ stress rate has received much attention in recent years. Experimental results by triaxial and hollow cylindrical tests among others have clearly shown is a common feature deformation granular materials like sand under complex loading paths including rotation principal axes. may be considered as natural consequence from view micromechanisms for inelastic materials. Responding to experimental observations, many types constitutive equations already been proposed with different concepts mathematical structures.