Peridynamic simulation of rock failure with surface flaw under dynamic loading

IF 4.7 1区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
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引用次数: 0

Abstract

To investigate the propagation of surface flaws in rocks under dynamic loading, an elastic−plastic ordinary state-based peridynamic model that considers the compressive to tensile strength ratio is used for numerical tests based on the results of previous experiments. The failure process of rocks containing three-dimensional surface flaws at different angles and depths under dynamic loading is simulated. The simulation results show that the peridynamic model used can well simulate the propagation of three-dimensional cracks in rocks and the failure process of specimens. Peridynamic simulations can be used to obtain strength variation regularity which is consistent with the experimental results. The crack generated on the surface of the specimen penetrates to a certain depth inside the specimen, which is related to the depth of the surface flaw. Shell-like cracks generated inside the specimen join with cracks generated on the surface to form complex three-dimensional cracks.

动态加载下带有表面缺陷的岩石破坏的周动态模拟
为了研究岩石表面缺陷在动荷载作用下的扩展,在以往实验结果的基础上,采用了考虑抗压强度与抗拉强度比的弹塑性普通状态围岩动力学模型进行数值试验。模拟了含有不同角度和深度的三维表面缺陷的岩石在动荷载作用下的破坏过程。模拟结果表明,所使用的围岩动力学模型能够很好地模拟岩石中三维裂缝的扩展和试样的破坏过程。围动力模拟可以获得强度变化的规律性,这与实验结果是一致的。试样表面产生的裂纹会向试样内部渗透到一定深度,这与表面缺陷的深度有关。试样内部产生的贝壳状裂纹与表面产生的裂纹结合形成复杂的三维裂纹。
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来源期刊
CiteScore
7.40
自引率
17.80%
发文量
8456
审稿时长
3.6 months
期刊介绍: The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.
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