Investigation of Energy-Based Crack Initiation Threshold from Meso-Scale Asphalt Concrete Response
2016 (English)In: 8th RILEM International Conference on Mechanisms of Cracking and Debonding in Pavements, Springer Netherlands, 2016, 679-685 p.Conference paper (Refereed)
The existence of a fundamental energy threshold for meso-scale crackinitiation is investigated using micromechanical modeling techniques. X-rayComputed Tomography (CT) is used to acquire the internal structure of an asphaltconcrete mixture while Digital Image Processing (DIP) techniques is used to segment and analyze the different phases present in the mixture. Finite Element (FE)modeling is used to simulate a tensile loading condition to establish a critical micromechanical criterion for meso-scale crack initiation. The meso-scale asphaltconcrete mixture is subjected to different loading rates to obtain the global strainenergy density at the instance when the critical micromechanical crack-initiationcriterion threshold is attained at different deformation rates. The result from thestudy shows that there exists a fundamental global strain energy density thresholdthat is invariant of the rate of loading at the instance of meso-scale crack initiation.The result of this study also shows the potential of the use of X-Ray computedtomography in understanding the cracking phenomenon in asphalt mixture.
Place, publisher, year, edition, pages
Springer Netherlands, 2016. 679-685 p.
RILEM Bookseries, ISSN 2211-0844 ; 13
Micromechanical damage, Micro-crack initiation, Asphalt concrete, X-ray tomography
IdentifiersURN: urn:nbn:se:kth:diva-198660DOI: 10.1007/978-94-024-0867-6_95ISBN: 978-94-024-0866-9ISBN: 978-94-024-0867-6OAI: oai:DiVA.org:kth-198660DiVA: diva2:1057965
8th RILEM International Conference on Mechanisms of Cracking and Debonding in Pavements
FunderSwedish Transport Administration
QC 201612202016-12-192016-12-192016-12-20Bibliographically approved