Development of a multiaxial viscoelastoplastic continuum damage model for asphalt mixtures.

摘要: This report highlights findings from the FHWA DTFH61-05-H-00019 project, which focused on development of multiaxial viscoelastoplastic continuum damage model for asphalt concrete in both compression and tension. Asphalt pavement, one largest infrastructure components United States, is a complex system that involves multiple layers different materials, various combinations irregular traffic loading, environmental conditions. The performance this structure closely related to concrete. To predict with reasonable accuracy, better understanding its deformation behavior under realistic conditions urgently needed. Over past decade, authors have been successful developing uniaxial material models can accurately capture critical phenomena such as microcrack-induced fatigue modeling, strain-rate temperature interdependence, viscoplastic flow, high modeling. resulting termed model. However, consider complicated nature in-service stress states, multidimensional real pavement structures, it also important incorporate considers vehicle climatic loads well boundary conditions; in-house finite element package has developed purpose.