Technical method for identifying material cracks in discrete element simulation
A discrete element and crack technology, which is applied in the field of crack identification in discrete element simulation, can solve problems such as inaccurate statistical methods and internal cracks in the material model.
Active Publication Date: 2020-08-11
XIANGTAN UNIV
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[0003] Discrete element simulation is currently applied to the initiation and propagation of cracks in many brittle materials, because the discrete element method is suitable for simulating the deformation and failure process of discrete particle assemblies under quasi-static or dynamic conditions, but the material model in the simulation results is currently The analysis of internal cracks is still in the blank stage
[0004] Judging from the literature and patents that have been mastered, most researchers directly treat the number of bond breaks inside the material model as the number of cracks inside the material model, but this statistical method is inaccurate, and the statistics will be much larger than those inside the model. The actual number of cracks
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[0043] The present invention will be described in further detail below in conjunction with the accompanying drawings, so as to understand the purpose, features and advantages of the present invention more clearly.
[0044] The invention relates to a technical method for identifying material cracks in discrete element simulation. SiC ceramic material is selected as an example brittle material, and PFC5.0 is selected as an example software 2D , the example process is to simulate a three-point bending test of SiC ceramics with a single crack defect. After the simulation is completed, the internal cracks of the SiC ceramic model are marked, which specifically includes the following steps:
[0045] (1) In this example, after the cutting simulation of SiC ceramics ends (the simulation results are as follows figure 2 As shown), there are 106 broken bonds in the ceramic material model, and all the broken bond information in the SiC ceramic model is extracted, including the occurrence...
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The invention discloses a technical method for identifying material cracks in discrete element simulation. The method comprises the following steps: acquiring time and position information of all fracture bonds in a discrete element model after discrete element simulation is finished; according to the obtained time and position information of the fracture bonds, marking all the fracture bonds as different cracks through a certain searching and judging method; and after searching is finished, outputting the number of all the cracks marked in the discrete element model, the length of each crackand energy released when each crack is formed. According to the technical method for identifying the material cracks in discrete element simulation, the number and the shapes of the cracks in the discrete element model can be effectively identified, and a blank of identifying cracks in the discrete element model in the field of discrete element simulation in the prior art is filled up.
Description
technical field [0001] The invention relates to the field of crack identification in discrete element simulation, in particular to a technical method for identifying material cracks in discrete element simulation. [0002] technical background [0003] Discrete element simulation is currently applied to the initiation and propagation of cracks in many brittle materials, because the discrete element method is suitable for simulating the deformation and failure process of discrete particle assemblies under quasi-static or dynamic conditions, but the material model in the simulation results is currently The analysis of internal cracks is still in the blank stage. [0004] Judging from the literature and patents that have been mastered, most researchers directly treat the number of bond breaks inside the material model as the number of cracks inside the material model, but this statistical method is inaccurate, and the statistics will be much larger than those inside the model. ...
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IPC IPC(8): G16C60/00G06F30/20
CPCG16C60/00G06F30/20Y02T90/00
Inventor 姜胜强唐超刘思思徐志强刘金刚杨世平
Owner XIANGTAN UNIV