Method for measuring deformation of discontinuous body containing structural plane and application

Abstract

The invention relates to a method for measuring deformation of a discontinuous body containing a structural plane. The method comprises the following steps of (1) taking photos of a given discontinuous body containing a structural plane and inputting the photographs into finite element software; separately generating triangular elements for different structural planes of the discontinuous body andoutputting corresponding node files and element files; (2) generating interior points; (3) solving the displacement of the interior point; (4) solving the vertex deformation function of triangular block; 5) converting that vertex displacement to physical displacement; (6) visualizing the displacement. The method of the invention can be specially used for the deformation measurement of the discontinuous body, and can better reflect the displacement situation of the discontinuous body, so that the method can be better applied to the deformation measurement of a rock sample containing a joint ora crack surface.

Description

technical field [0001] The invention belongs to the technical field of discontinuity deformation processing, and in particular relates to a method for measuring deformation of a discontinuity including a structural surface and an application thereof. Background technique [0002] Rock is a solid aggregate composed of one or more minerals. As a product of geological processes, it often has the characteristics of heterogeneity, anisotropy and discontinuity. Among them, discontinuity manifests itself in rocks with irregular structural planes. In addition, the destruction of rock is essentially a process from continuous to discontinuous. The microstructure planes inside the rock gradually grow and connect in series, and gradually become macroscopically significant crack planes, which eventually lead to rock failure. In order to understand the deformation and failure mechanism of rock more deeply, it is necessary to conduct quantitative analysis on the discontinuous deformation ...

AI Technical Summary

Problems solved by technology

[0005] For discontinuities such as figure 1 , assuming that there is a discontinuity surface τ in the discontinuity Ω, define Ω 1 The discontinuous surface at τ + ,Ω 2 The discontinuous surface at τ - , when digital image correlation (DIC) is used for deformation analysis, for the pixels at the discontinuous surface, two sub-blocks (Ω 1 and Ω 2 ) deformation information, the displacements of the two sub-blocks are often different, so that the displacement of the discontinuous surface analyzed by DIC cannot reflect the real situation. Therefore, in view of these problems, an extension of DIC’s ability to solve the deformation of discontinuous bodies is provided. It is of great practical significance to be able to measure the deformation of rock mass containing joints and samples containing cracked surfaces, etc.

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