Effects of Microparameters on Macroparameters of Flat-Jointed Bonded-Particle Materials and Suggestions on Trial-and-Error Method

The aims of this paper are to analyze the effects of microparameters on macroparameters of flat-jointed bonded-particle materials of particle flow code in two dimensions (PFC2D) and improve the efficiency of trial-and-error method in calibration of microparameters. The trial-and-error method is alwa...

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Bibliographic Details
Published in:Geotechnical and geological engineering 2017-04, Vol.35 (2), p.663-677
Main Author: Chen, Peng-yu
Format: Article
Language:English
Subjects:
Bonded joints
Calibration
Civil Engineering
Compression
Computer simulation
Dimensions
Earth and Environmental Science
Earth Sciences
Empirical analysis
Error analysis
Flow charts
Geotechnical Engineering & Applied Earth Sciences
Hydrogeology
Laboratories
Laboratory tests
Limestone
Mathematical models
Original Paper
Terrestrial Pollution
Tests
Trial and error methods
Two dimensional flow
Waste Management/Waste Technology
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Summary:The aims of this paper are to analyze the effects of microparameters on macroparameters of flat-jointed bonded-particle materials of particle flow code in two dimensions (PFC2D) and improve the efficiency of trial-and-error method in calibration of microparameters. The trial-and-error method is always used to calibrate the microparameters for a PFC2D model, but it is time-consuming and empirical. To improve the efficiency of the trial-and-error method, the effects of microparameters on macroparameters need to be analyzed. By using the trial-and-error method, a desirable set of microparameters for a uniaxial compression PFC2D model (with a flat-joint contact model as the contact model) of limestone were calibrated to match the macroscopic properties obtained from laboratory tests. Based on the calibration set of microparameters, effects of microparameters on macroparameters of the PFC2D model were studied by the orthogonal design method. On this basis, a flowchart of calibrating microparameters via trial-and-error method was proposed. This flowchart was used to calibrate the microparameters of granite. The macroparameters and failure characteristics determined from numerical simulation were very similar to those of laboratory tests, confirming the effectiveness of the proposed flowchart.
ISSN:0960-3182
1573-1529
DOI:10.1007/s10706-016-0132-5