Modeling of Rutting Using the Unified Disturbed State Concept
November 16, 2015
Modeling of Rutting Using the Unified Disturbed State Concept
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Abstract: Flexible pavements comprise more than 90 percent of paved roads in the United States. Although flexible pavements are widely used for reasons such as cost, constructability and performance, they often exhibit rutting. Rutting is the accumulation of longitudinal depressions under the wheel paths caused by the repeated traffic loads. Rut is a major concern for the integrity of pavement structure and traffic safety. In this presentation, numerical modeling of rutting will be discussed. The presentation will specifically focus on material modeling using the unified disturbed state concept (DSC), developed by Desai and used by the geomechanics community world-wide for modeling of materials and interfaces. Pertinent laboratory testing and evaluation of material parameters will also be discussed. Finally, validations (specimen-level and boundary value problem-level) of the DSC model will be presented.
Bio: Dr. Desai is renowned, and recognized internationally for his significant and outstanding contributions in research, teaching, applications and professional work in a wide range of topics in engineering. Dr. Desai’s research on the development of the innovative disturbed state concept (DSC) for constitutive modeling of materials and interfaces/joints has been adopted for research and taught in many countries. In conjunction with nonlinear finite element method, it provides an innovative and alternative procedure for analysis, design and reliability for challenging nonlinear problems of modern technology. He is credited with introducing the interdisciplinary definition of Geomechanics that involves various areas such as geotechnical engineering and rock mechanics, static and dynamics of interacting structures and foundations, fluid flow through porous media, geoenvironmental engineering, natural hazards such as earthquakes, landslides and subsidence, petroleum engineering, offshore and marine technology, geological modeling, geothermal energy, ice mechanics, and lunar and planetary systems.
