Testing device for contact shear resistance, bending resistance and torsion resistance of hemispherical ideal cementation particles

Abstract

The invention relates to a testing device for contact shear resistance, bending resistance and torsion resistance of hemispherical ideal cementation particles. The testing device comprises an upper clamping piece and a lower clamping piece which are aligned up and down; an upper bath opening is formed in the lower side of the upper clamping piece; a lower bath opening is formed in the upper side of the lower clamping piece; the upper bath opening and the lower bath opening are communicated, and form clamping space clamping the hemispherical ideal cementation particles; force applying pieces used for force application are arranged on the outer sides of the upper clamping piece and the lower clamping piece respectively; the upper clamping piece comprises an upper top plate and two upper side surface plates connected with the two sides of the upper top plate; the upper bath opening is defined by the two upper side surface plates and the upper top plate; the lower clamping piece comprises a lower top plate and two lower side surface plates connected with the two sides of the lower top plate; the lower bath opening is defined by the two lower side surface plates and the lower top plate. Compared with the prior art, the testing device can realize test verification of a discrete element microcosmic contact model under a three-dimensional condition, particularly torsion resisting and bending resisting torque characteristic test of cementation particles, and provides abundant test foundation for three-dimensional model verification.

Description

technical field [0001] The invention relates to a shear resistance and torsion resistance test device, in particular to a hemispherical ideal cemented particle contact shear resistance, bending resistance and torsion resistance test device. Background technique [0002] Sand foundations are often encountered in foundation engineering and underground engineering. At present, the discrete element method is often used to analyze discrete granular materials such as sand and soil. The key point of the discrete element method is the contact mechanics between particles, that is, the contact constitutive relationship. The discrete element method has been successfully used in the numerical simulation of the mechanical behavior of non-cemented granular materials such as dry sand. However, the natural sand and dry sand on the site have some completely different mechanical behaviors, because most of the natural sand has a microstructure, that is, there are cements between soil particl...

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Problems solved by technology

However, the above device is only suitable for testing the shear and bending mechanical properties of cylindrical cemented particles under linear and uniform normal pressure, but not suitable for shearing, bending and torsion of hemispherical cemented particles under normal pressure of concentrated point load. , Bending torsion mechanical properties test

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