Crack Propagation in Hot Mix Asphalt Overlay Using Extended Finite-Element Model
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 5
Abstract
This study investigates the crack propagation behavior of asphalt materials through the use of damage models using the principles of the disturbed state concept (DSC). Traction–separation crack response, crack initiation, and evolution behavior are investigated by modeling pavement systems consisting of a hot mix asphalt (HMA) overlay on an existing HMA layer and subjected to wheel loading. Pre-existing cracks located within the existing asphalt material are also considered. The extended finite-element method (XFEM) was employed to model mesh-independent cracking. The finite-element model was validated by comparing the results to indirect tensile and direct tensile laboratory testing on asphalt samples. The validated model was then used to examine crack propagation in the pavement system with and without pre-existing cracks.
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©2016 American Society of Civil Engineers.
History
Received: Feb 14, 2016
Accepted: Sep 12, 2016
Published online: Nov 29, 2016
Discussion open until: Apr 29, 2017
Published in print: May 1, 2017
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