Hemispherical ideal cemented particle contact shear, bending and torsion test device

Abstract

The invention relates to a hemispherical ideal cemented particle contact shear resistance, bending resistance and torsion resistance test device, which comprises an upper clamping part and a lower clamping part which are aligned up and down. The upper side of the holder is provided with a lower notch, and the upper notch communicates with the lower notch to form a clamping space for clamping hemispherical ideal cemented particles. The force-applying part; the upper clamping part includes an upper top plate and two upper side panels connected to both sides of the upper top plate, and the upper notch is formed between the two upper side panels and the upper top plate; the lower clamping part includes The lower top plate is connected to two lower side panels on both sides of the lower top plate, and the lower notch is formed between the two lower side panels and the lower top plate. Compared with the prior art, the present invention can realize the experimental verification of the discrete element microscopic contact model in the three-dimensional case, especially the torsion-resistant and bending-torque mechanical characteristic test of the cemented particles, providing a sufficient experimental basis for the verification of the three-dimensional model.

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 ground is often encountered in foundation engineering and underground engineering. At present, discrete element method is often used to analyze discrete granular materials such as sand. 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 site have some completely different mechanical behaviors. This is because most natural sand has a microstructure, that is, there are cements between soil particles. Establishing cemented ...

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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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