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Graded crushed stone is often used in road pavement bases. 18-02K.Ĭompeting interests: I have read the journal’s policy and the authors of this manuscript have the following competing interests. 19-27K and the scientific project from Shaanxi Provincial Communication No. 300102218212) the scientific project from Shaanxi Provincial Communication No. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.ĭata Availability: All relevant data are within the manuscript and its Supporting Information files.įunding: This work was supported by the Scientific Research of Central Colleges of China for Chang'an University (No. Received: JAccepted: SeptemPublished: September 30, 2021Ĭopyright: © 2021 Jiang et al. PLoS ONE 16(9):Įditor: Ahmed Mancy Mosa, Al Mansour University College-Baghdad-Iraq, IRAQ The critical failure stress is approximately linearly correlated with the confining pressure, and the cumulative failure equation of plastic deformation is established.Ĭitation: Jiang Y-j, Ni C-y, Zhang Y, Yi Y (2021) Numerical investigation of the plastic deformation behaviour of graded crushed stone. The action time curve results are consistent with indoor measurement results, which proves the simulation’s reliability. The recommended specimen size is 10 cm (Ф) × 20 cm ( h). When the specimen height and diameter are greater than 20 and 10 cm, respectively, the specimen size has little influence on the simulated axial strain. The plastic deformation of the simulated specimen tends to be stable under 10,000 dynamic loading cycles. When the calculation time step is greater than 1 E−4 s per step, the stability of the dynamic triaxial numerical test of graded crushed stone is good. The prediction model of permanent deformation cumulative failure was then established. We then determined the critical failure stress level. We studied the accumulation rule and failure standard of permanent deformation. A method for determining the test conditions was proposed, and the reliability of the simulation was verified. The influence of test conditions on simulation results was analysed through numerical simulation. A numerical model of the dynamic triaxial test of graded crushed stone was established based on DEM (Discrete Element Method) to study its dynamic characteristics.