Внедрение метода конечно-дискретных элементов в программный комплекс Abaqus/Explicit для моделирования деформирования и разрушения пород

Autor: Protosenya, Anatoliy, Karasev, Maxim, Ochkurov, Valery
Přispěvatelé: The research has been funded by the grant of the Russian Scientific Fund (project No. 16-17-00117), Работы выполнена при поддержке гранта Научного Российского Фонда (проект № 16-17-00117)
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Східно-Європейський журнал передових технологій; Том 6, № 7 (90) (2017): Прикладна механіка; 11-18
Восточно-Европейский журнал передовых технологий; Том 6, № 7 (90) (2017): Прикладная механика; 11-18
Eastern-European Journal of Enterprise Technologies; Том 6, № 7 (90) (2017): Applied mechanics; 11-18
ISSN: 1729-3774
1729-4061
Popis: Розглянуто питання створення моделі дискретно-суцільного середовища для опису процесів деформування і руйнування гірської породи. Запропоновано методику впровадження методу кінцево-дискретних елементів в рамках програмного комплексу для виконання розрахунків на міцність Abaqus. Розглянуто приклади чисельного моделювання навантаження зразка гірської породи і прогнозу розвитку геомеханічних процесів в околиці породного оголення
The paper has considered development of a model within the framework of the method of finite-discrete elements for describing processes of rock deformation and fracture. Analysis of the methods of mathematical modeling of geomechanical processes which makes it possible to take into account the medium damage or fracture was presented. A physical model of rock fracture was proposed. It considers the fracture process as formation of microcracks of separation and shear or their combination. Examples of numerical modeling of loading a rock sample by the scheme of uniaxial compression and splitting by compression along generatrixes and in conditions of volume compression were considered. Formulation and results of simulation of development of a stress-strain state in the vicinity of the rock outcrop within the framework of the method of finite-discrete elements were presented.Within the framework of the study, an algorithm of implementing the method of finite-discrete elements in the Abaqus/Explicit software complex for strength calculations including all main stages of forming the numerical model from generation of an elemental grid to specification of boundary conditions has been worked out. A software solution for generation of the elemental grid was developed and capabilities of the Abaqus/Explicit software complex were expanded. This solution allows one to generate elemental grids for bodies of arbitrary shapes taking into account presence of surfaces of weakening within the body, both in flat and spatial formulations. The capabilities of the Abaqus/Explicit software complex were expanded in the field of modeling rock strength under the conditions of volumetric compression. According to the results of the performed studies, it was established that modeling of fracture formation (formation of shear and separation cracks) at the microlevel has allowed us to reliably represent processes of rock deformation and fracture. The possibility of using the method of finite-discrete elements for prediction of development of geomechanical processes in the vicinity of underground structures was presented.The presented study results allow us to extend the scope of the method of finite-discrete elements to solve the problems of geomechanics and form the basis for application of this method in solving engineering problems
Рассмотрены вопросы создания модели дискретно-сплошной среды для описания процессов деформирования и разрушения горной породы. Предложена методика внедрения метода конечно-дискретных элементов в рамках программного комплекса для выполнения прочностных расчетов Abaqus. Рассмотрены примеры численного моделирования нагружения образца горной породы и прогноза развития геомеханических процессов в окрестности породного обнажения
Databáze: OpenAIRE
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