Representative characterization method for mechanical properties of river ice

Abstract

The invention relates to a representative characterization method for mechanical properties of river ice, and the method specifically comprises the steps: S1, determining a microstructure and a mesoscopic mechanism of a river ice representative body, obtaining the river ice representative body based on a mesoscopic calculation mechanical method, and constructing a river ice mesoscopic calculation model; S2, determining the strength performance of the river ice under different working conditions based on the river ice strength under the river ice mesoscopic calculation model, and analyzing the size of a river ice representative body to obtain a final result; and S3, carrying out statistical analysis on the strength change of the final result under different working conditions, and determining the minimum mesoscopic river ice body element capable of reflecting the overall sample strength. According to the method, a mesoscopic calculation mechanical method is adopted, the river ice strength is simulated on the basis of a constructed river ice mesoscopic calculation model, simulation calculation is conducted on the river ice strength under the uniaxial loading condition, and therefore the size of a river ice calculation strength representative body is determined.

Description

technical field [0001] The invention relates to the technical field of hydraulic engineering, in particular to a representative characterization method for the mechanical properties of river ice. Background technique [0002] At present, in the research on material representative bodies, most of the existing achievements focus on the research on material elastic performance representative bodies, and less quantitative research on strength representative bodies. In some public documents, the representative body size of the particle-reinforced random heterogeneous material numerical sample with a size of 5 mm × 5 mm to 25 mm × 25 mm is analyzed under uniaxial tension and shear loads. The results show that: the representative body size in the hardening stage Much larger than the elastic stage, but no quantitative results are given for the size of the representative bodies. Using the method of numerical limit analysis, the influence of the selection of representative body size ...

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Problems solved by technology

For river ice, strength is an important parameter to measure its mechanical properties in the freezing stage. Due to the complexity of its mesoscopic structure, there are no detailed reports on the size of river ice representatives based on strength statistics.

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