Volume force gradient loading method based on 3D (Three Dimensional) printing technology

Abstract

The invention discloses a volume force gradient loading method based on a 3D (Three Dimensional) printing technology and belongs to the technical field of geotechnical engineering mechanics experiments. The volume force gradient loading method comprises the following steps: calculating ground stress of different structural planes in actual geotechnical engineering, shrinking a geotechnical specimen according to the proportion, simulating magnetic field intensity by numerical simulation software ANSYS, and obtaining the effect of a magnetic field by a magnetic substance in an electromagnetic field, thus generating one volume force; calculating out the quality of magnetic materials at all structural planes according to an electromagnetic principle; constructing a three-dimensional model of ato-be-prepared test piece, and inputting the three-dimensional model into a 3D printer. When the test piece is produced, one spray head prints a geotechnical material and the other spray head printsa magnetic substance; after the test piece is manufactured, the test piece is putted into the magnetic field; the magnetic substances are attracted by an electromagnet to generate one gradient volumeforce, and the aim of simulating an actual environment is achieved. According to the volume force gradient loading method disclosed by the invention, volume force loading can be manually controlled and the defect of volume loading non-uniformity of a traditional centrifuge is overcome.

Description

technical field [0001] The invention relates to a body force loading method, in particular to a body force gradient loading method based on 3D printing technology, and belongs to the technical field of geotechnical engineering mechanics experiments. Background technique [0002] In geotechnical engineering, geotechnical workers often need to simulate rock masses in the real environment in the laboratory, such as slopes, dams, etc. However, in the natural environment, there are many structural planes such as joints and fissures in the rock mass, and the mechanical properties of the rock mass are mainly controlled by these structural planes, which makes it very difficult and necessary to simulate the real rock mass in the laboratory. The shape and distribution of cracks and other structural surfaces can be precisely controlled by 3D printing technology, and even very complex structural surfaces can be produced, which makes it possible to obtain simulated specimens of real rock...

AI Technical Summary

Problems solved by technology

However, due to the size of the instrument, it cannot be applied to large-volume specimens. At the same time, there are disadvantages such as uneven body force loading, complicated operation, and damage to specimens.

[0008] In summary, the current supergravity loading device generally has problems such as being unable to apply to large-volume test blocks, uneven body force loading, etc.

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