Third M.I.T. Conference on Computational Fluid and Solid Mechanics June 14–17, 2005  

The displacement discontinuity method for modeling fracture in the semi-circular bending test

B. Birgissona,*, A. Monteparab, R. Roquea, E. Romeob, G. Tebaldib
aDepartment of Civil & Coastal Engineering, University of Florida, Gainesville, FL 32611, USA
bDepartment of Civil and Environmental Engineering and Architecture, University of Parma, PR 43100, Italy

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This paper investigates the capability of a displacement discontinuity boundary element method, which was already used to assess the mechanics of fracture in the SuperPave Indirect Tension Test, to model the microstructure of asphalt mixtures. The paper presents a semicircular bending test simulation in order to verify the independence of the method from the testing setup application. The predicted stress-strain curves were shown to compare well to the experimental results, as well as the cracking behaviour. The results imply that the method is able to characterize asphalt mixtures properties regardless of the particular testing setup used in the investigation. It has also shown promise as a tool for studying the mechanism of crack growth and propagation in hot mix asphalt (HMA) during every kind of testing setup.

Keywords:  Displacement discontinuity method; Hot mix asphalt; Semi-circular bending test

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