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Xue-yuan Lu

Bio: Xue-yuan Lu is an academic researcher. The author has contributed to research in topics: Discrete element method & Materials science. The author has an hindex of 1, co-authored 1 publications receiving 5 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, the authors investigated the shear fatigue performance of asphalt mixture and factors influencing performance using a three-dimensional (3D) discrete element method (DEM) incorporated into the algorithm.
Abstract: This study aims to investigate the shear fatigue performance of asphalt mixture and factors influencing performance using a three-dimensional (3D) discrete element method (DEM) incorporated...

15 citations

Journal ArticleDOI
TL;DR: In this paper , a direct ink writing (DIW) geopolymer adsorption sieve (GAS) preparation strategy was proposed for methylene blue (MB) inks.

8 citations

Journal ArticleDOI
TL;DR: In this paper , the authors investigated the mechanical response of asphalt surfaces under moving traffic loads using the three-dimensional (3D) discrete element method (DEM) and established a discrete element model for asphalt surface based on the random generation algorithm of irregular particles.
Abstract: This paper investigates the mechanical response of asphalt surfaces under moving traffic loads using the three-dimensional (3D) discrete element method (DEM). As an example of a semirigid base asphalt pavement, a discrete element model for asphalt surface was established based on the random generation algorithm of irregular particles in Python language and DEM. The model considered the temperature gradient and fatigue damage to simulate the permanent deformations, shear stresses, and strains in asphalt surfaces under different working conditions (e.g., different temperatures and numbers of repeated loads). Part of the simulation results was verified by performing a full-scale accelerated loading test (ALT). Results show that the 3D discrete element model embedded with temperature gradient and fatigue damage could be used to predict the mechanical response of asphalt surfaces under repeated loads. As the temperature increased, the mechanical response of asphalt surfaces increased. The middle surface was the main area of shear stresses in semirigid base asphalt pavements. Due to fatigue damage, the stresses and strains in asphalt surfaces increased with the number of repeated loads.

4 citations


Cited by
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Journal ArticleDOI
Jin Chang, Jue Li, Hengwu Hu, Junfeng Qian, Miao Yu 
TL;DR: In this article , the authors developed a new method to generate a 3D model of the real composition and aggregate shape to characterize the aggregate segregation during Superpave gyratory compaction (SGC).
Abstract: In the laboratory, there are significant differences in mechanical properties of asphalt mixtures with the same size gradation and asphalt binder, which is not conducive to evaluating and designing the pavement structure accurately. Meanwhile, the influence of aggregate segregation in height on the mechanical properties of asphalt mixtures is unclear. This study developed a new method to generate a three-dimensional (3D) model of the real composition and aggregate shape to characterize the aggregate segregation during Superpave gyratory compaction (SGC). The graphic segregation index (GPSI) is employed to assess the mixing degree of coarse aggregate and asphalt mortar within spatially variable specimens [i.e., Superpave-13, stone mastic asphalt (SMA-13), and open-graded asphalt friction course (OGFC-13) mixtures]. The results reveal that asphalt mixtures with different aggregate gradations have different compaction characteristics. For example, the increase of fine aggregates may reduce the strain energy and the average contact force during compaction. The compaction curves of the three gradation types were very different, which is attributed to different packing states and gyratory numbers. Aggregate segregation has a significant effect on micromechanical behavior. Specifically, the contact number and the proportion of strong contact force change considerably with height. In terms of segregation degree, the GPSI of OGFC-13 specimens was the highest, and the volume change of its fine particles created a leakage zone after the compaction. Additionally, this segregation had an increasing tendency with gyration numbers, and it was influenced by gradation types. Furthermore, the uniaxial compressive strength and cohesion of the Superpave-13 specimen decreased, whereas the friction angle increased with the increase of GPSI.

8 citations

Journal ArticleDOI
TL;DR: In this paper , the authors investigated the mechanical response of asphalt surfaces under moving traffic loads using the three-dimensional (3D) discrete element method (DEM) and established a discrete element model for asphalt surface based on the random generation algorithm of irregular particles.
Abstract: This paper investigates the mechanical response of asphalt surfaces under moving traffic loads using the three-dimensional (3D) discrete element method (DEM). As an example of a semirigid base asphalt pavement, a discrete element model for asphalt surface was established based on the random generation algorithm of irregular particles in Python language and DEM. The model considered the temperature gradient and fatigue damage to simulate the permanent deformations, shear stresses, and strains in asphalt surfaces under different working conditions (e.g., different temperatures and numbers of repeated loads). Part of the simulation results was verified by performing a full-scale accelerated loading test (ALT). Results show that the 3D discrete element model embedded with temperature gradient and fatigue damage could be used to predict the mechanical response of asphalt surfaces under repeated loads. As the temperature increased, the mechanical response of asphalt surfaces increased. The middle surface was the main area of shear stresses in semirigid base asphalt pavements. Due to fatigue damage, the stresses and strains in asphalt surfaces increased with the number of repeated loads.

4 citations

Journal ArticleDOI
TL;DR: An asphalt mixture is always in a complex stress state during the service life of pavement, and its resistance can be objectively characterized only by applying the strength theory to establish its resistance as discussed by the authors, which can be found in the literature.
Abstract: An asphalt mixture is always in a complex stress state during the service life of pavement. Its resistance can be objectively characterized only by applying the strength theory to establish...

4 citations

Journal ArticleDOI
TL;DR: In this article, the authors established the discrete element model of asphalt pavement and discussed the effects of temperature changes of interlaminar bonding layer on mechanical responses of asphalt paving in different seasons.
Abstract: In this study, the discrete-element model (DEM) of asphalt pavement is established to discuss the effects of temperature changes of interlaminar bonding layer on mechanical responses of asphalt pavement in different seasons. Calculated and test results indicate that the temperature within the depth range of 0–5 cm in asphalt pavement is obviously affected by ambient temperature. The heat is accumulated within the pavement depth range of 2–5 cm, greatly affecting the interlaminar bonding state. In addition, lower temperature in winter increases the continuity of asphalt pavement layers, reducing the compressive stress in upper layer. In addition, higher temperature in summer weakens the interlaminar bond, increasing the horizontal tensile stress in upper layer and at the interlaminar interface. Further, lower interlaminar bonding strength increases the maximum shear stress at the interlaminar interfaces between asphalt pavement layers, as well as at the interface between asphalt mortar and aggregate. As the pavement depth is increased, the horizontal shear stress is increased. Finally, the high temperature increases the tensile strain near the bottom of upper layer. The displacement directions of more aggregate particles move vertically downward at low temperature, but move to two lateral sides at high temperature.

4 citations

Journal ArticleDOI
TL;DR: In this paper , the authors used the three-dimensional module in the particle flow code (PFC3D) from which a threedimensional numerical model of the Marshall split specimen and a three-point trabecular bending specimen was established.

3 citations