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首页> 中文期刊> 《东南大学学报：英文版》 >Simulation and analysis of two-point bending fatigue test of asphalt concrete based on discrete element model

Simulation and analysis of two-point bending fatigue test of asphalt concrete based on discrete element model

         
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In order to investigate the fatigue performance ofFrench high modulus asphalt concrete and the correlationbetween Burger＇s parameters and fatigue life, the virtualmodel of asphalt mixture trapezoidal specimen in the two-pointbending fatigue test was constructed in discrement elementsoftware PFC3D. The initial stiffness and the maximum stresswhen the specimen reached fatigue were calculated. Throughthe comparison between virtual and single field fatigue testcurves, the credibility of simulation in DEM was verified.Then, the impacts of top controlled displacement and Burger＇sparameters （ El, E2, η1, η2） on the fatigue life of the specimenwere explored. The simulation results indicate that themaximum stress increases with the increase in the topcontrolled displacement. With the increase of E1 and thedecrease of E2 in Burger＇s model, the modulus of the asphaltbinder increases, and the fatigue performance of the asphaltmixture enhances, η1 and η22 have limited influence on fatiguelife compared with El and E2.

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