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Rock mechanics test numerical simulation method based on ABAQUS

A technology of rock mechanics and numerical simulation, applied in the field of rock mechanics tests, to enrich the content of mechanical tests and improve the efficiency of modeling and analysis

Inactive Publication Date: 2018-06-19
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present invention provides an ABAQUS-based numerical simulation method for rock mechanics tests to solve the problems existing in the prior art

Method used

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  • Rock mechanics test numerical simulation method based on ABAQUS
  • Rock mechanics test numerical simulation method based on ABAQUS
  • Rock mechanics test numerical simulation method based on ABAQUS

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Embodiment 1

[0053] Granite is hard, compact and high-strength, and is a relatively common engineering rock mass. The rock core obtained from a project site was selected and processed into 2 standard samples of φ50mm×100mm, and the triaxial compression test was carried out on the RMT multifunctional rock testing machine (confining pressure 10MPa). The sample deviatoric stress-axial strain relationship curve is obtained from the triaxial compression test, such as Figure 5 shown. The failure of the granite sample as Figure 6 shown. It can be seen that the failure mode of granite samples under triaxial compression is relatively consistent, which belongs to shear failure, so it is reasonable to use the D-P criterion considering the shear effect as the criterion for rock failure.

[0054] The experimental data of the loading process of the two test blocks were sorted out, and the physical and mechanical parameters of each sample were obtained as shown in Table 2. At the same time, accordi...

Embodiment 2

[0058] Call the numerical simulation system of rock mechanics test, use Figure 4a , Figure 4b and Figure 4c The user-defined interactive window shown in the figure enters the corresponding coefficients to simulate the failure process of the granite sample. User-defined interactive window parameters are entered as follows:

[0059] Loading parameter setting: the axial pressure P1 is set to 250000000Pa, and the surrounding rock is set to 10000000Pa.

[0060] Sample geometric parameter setting: the sample height H is set to 100mm, and the diameter D is 50mm.

[0061] The setting of mechanical parameters of the test block: see Table 2, the cohesion force is set to 27000000Pa, and the friction angle is 45°.

[0062] The loading process of the test block is simulated by the numerical simulation system of the rock mechanics test, and the obtained simulation results are as follows: Figure 7 shown. It can be seen that after the loading of the test block, the whole is divided ...

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Abstract

The invention discloses a rock mechanics test numerical simulation method based on ABAQUS, and relates to the technical field of rock mechanics tests. Secondary development is conducted on the ABAQUSthrough a Python language, the preprocessing process (of determining model size and loading parameters and the like) and the postprocessing process (of outputting a simulation result and collecting data) are compiled, and a parameterized numerical simulation system of the rock mechanics test is established; the Drucker-Prager failure criterion considering the shearing effect is compiled in a vusdfld subprogram of the ABAQUS, a failure unit deletion algorithm is introduced to research the rock test block deformation breakage process under the load effect, the numerical simulation of the rock mechanics test process is realized, and the reasonability and effectiveness of the simulation system are verified with the granite test block three-axis compression test as the case. The rock mechanicstest numerical simulation method and a laboratory loading platform can conduct data matching according to user requirements, the modeling and analyzing efficiency is greatly improved, and meanwhile the mechanics test content is enriched.

Description

technical field [0001] The invention relates to the technical field of rock mechanics tests, in particular to an ABAQUS-based numerical simulation method for rock mechanics tests. Background technique [0002] Rock mechanics test is an important way to study rock mechanical properties and obtain mechanical parameters. Its application involves many engineering fields such as civil engineering, mining, water conservancy and hydropower, and underground engineering. At the same time, with the continuous development of modern mechanics, mathematics, and computer technology, numerical simulation provides an effective means for the research of engineering problems due to its effectiveness in simulation analysis and three-dimensional visualization of calculation results. [0003] In recent years, the numerical simulation of rock mechanics tests has become a research hotspot in the field of analysis of rock mechanics properties. Jia Shanpo et al. used numerical simulation methods to...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F2111/10G06F2119/06
Inventor 王辉郑朋强王清标
Owner SHANDONG UNIV OF SCI & TECH
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