Numerical investigation of the plastic deformation behaviour of graded crushed stone.

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. The influence of test conditions on simulation results was analysed through numerical simulation. A method for determining the test cond...

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Autores principales:	Ying-Jun Jiang, Chen-Yang Ni, Yu Zhang, Yong Yi
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/35f8c19cfa0048f0b6a070f646144606
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spelling	oai:doaj.org-article:35f8c19cfa0048f0b6a070f6461446062021-12-02T20:13:53ZNumerical investigation of the plastic deformation behaviour of graded crushed stone.1932-620310.1371/journal.pone.0258113https://doaj.org/article/35f8c19cfa0048f0b6a070f6461446062021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0258113https://doaj.org/toc/1932-6203A numerical model of the dynamic triaxial test of graded crushed stone was established based on DEM (Discrete Element Method) to study its dynamic characteristics. The influence of test conditions on simulation results was analysed through numerical simulation. A method for determining the test conditions was proposed, and the reliability of the simulation was verified. We studied the accumulation rule and failure standard of permanent deformation. We then determined the critical failure stress level. The prediction model of permanent deformation cumulative failure was then established. When the calculation time step is greater than 1E-4 s per step, the stability of the dynamic triaxial numerical test of graded crushed stone is good. The plastic deformation of the simulated specimen tends to be stable under 10,000 dynamic loading cycles. 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 recommended specimen size is 10 cm (Ф) × 20 cm (h). The action time curve results are consistent with indoor measurement results, which proves the simulation's reliability. The critical failure stress is approximately linearly correlated with the confining pressure, and the cumulative failure equation of plastic deformation is established.Ying-Jun JiangChen-Yang NiYu ZhangYong YiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 9, p e0258113 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ying-Jun Jiang Chen-Yang Ni Yu Zhang Yong Yi Numerical investigation of the plastic deformation behaviour of graded crushed stone.
description	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. The influence of test conditions on simulation results was analysed through numerical simulation. A method for determining the test conditions was proposed, and the reliability of the simulation was verified. We studied the accumulation rule and failure standard of permanent deformation. We then determined the critical failure stress level. The prediction model of permanent deformation cumulative failure was then established. When the calculation time step is greater than 1E-4 s per step, the stability of the dynamic triaxial numerical test of graded crushed stone is good. The plastic deformation of the simulated specimen tends to be stable under 10,000 dynamic loading cycles. 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 recommended specimen size is 10 cm (Ф) × 20 cm (h). The action time curve results are consistent with indoor measurement results, which proves the simulation's reliability. The critical failure stress is approximately linearly correlated with the confining pressure, and the cumulative failure equation of plastic deformation is established.
format	article
author	Ying-Jun Jiang Chen-Yang Ni Yu Zhang Yong Yi
author_facet	Ying-Jun Jiang Chen-Yang Ni Yu Zhang Yong Yi
author_sort	Ying-Jun Jiang
title	Numerical investigation of the plastic deformation behaviour of graded crushed stone.
title_short	Numerical investigation of the plastic deformation behaviour of graded crushed stone.
title_full	Numerical investigation of the plastic deformation behaviour of graded crushed stone.
title_fullStr	Numerical investigation of the plastic deformation behaviour of graded crushed stone.
title_full_unstemmed	Numerical investigation of the plastic deformation behaviour of graded crushed stone.
title_sort	numerical investigation of the plastic deformation behaviour of graded crushed stone.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/35f8c19cfa0048f0b6a070f646144606
work_keys_str_mv	AT yingjunjiang numericalinvestigationoftheplasticdeformationbehaviourofgradedcrushedstone AT chenyangni numericalinvestigationoftheplasticdeformationbehaviourofgradedcrushedstone AT yuzhang numericalinvestigationoftheplasticdeformationbehaviourofgradedcrushedstone AT yongyi numericalinvestigationoftheplasticdeformationbehaviourofgradedcrushedstone
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Numerical investigation of the plastic deformation behaviour of graded crushed stone.

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