Three Dimensional Elasto-Visco-Plastic Finite Element Model for Combined Physical-Mechanical Moisture Induced Damage in Asphaltic Mixes
2007 (English)In: Asphalt Paving Technology: Association of Asphalt Paving Technologists-Proceedings of the Technical Sessions, Volume 76, 2007, Vol. 76, 495-524 p.Conference paper (Refereed)
In order to understand and quantify thephysicalprocesses leading tomoistureinduceddamagein asphalt and in order to combine them with themechanicalones, an extensive, experimental and analytical, investigation is undertaken at Delft University of Technology in the Netherlands. In this investigation new tools were developed that enable the simulation ofmoistureinfiltration due to pressure driven (i.e. hydraulic suction and water flow) andmoisturegradient driven (i.e. molecular diffusion) processes. In addition, the tools for the simulation of the variousphysicaldamageinducing processes, associated with thesemoistureinfiltration processes, have been developed. The modeling ofmoistureinduceddamagein asphaltmixes, however, cannot be done correctly without a generic constitutive theory for the dry response of the asphalt components. This contribution presents athreedimensionalvisco-elasto-plasticconstitutivemodelfor the mastic and shows the coupling with themoistureinfiltrationmodel. The same formulation can be used for simulation of the response of the other components. A methodology for the determination of themodelparameters is also presented. At the end of this paper a micro-scale simulation is given to illustrate thedamagegenerated in the mastic-aggregate interface due to bothplasticstrain andmoistureinduceddamage.
Place, publisher, year, edition, pages
2007. Vol. 76, 495-524 p.
IdentifiersURN: urn:nbn:se:kth:diva-84059OAI: oai:DiVA.org:kth-84059DiVA: diva2:499126
Asphalt Paving Technology 2007 AAPT; San Antonio, TX; 11 March 2007 through 14 March 2007
TSC import 1894 2012-02-10. QC 201203012012-02-132012-02-132012-03-01Bibliographically approved