Experimental and Numerical Data for Multistage Cyclic Dynamic–Static Triaxial Tests on Ice-Filled Fissured Rock-Like Specimens

Published: 8 October 2026| Version 2 | DOI: 10.17632/s3y9f3chv5.2
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Description

This dataset supports the investigation of cyclic damage accumulation, post-cyclic load-bearing capacity, and failure mechanisms of rock-like specimens containing ice-filled fissures. The specimens had a fissure aperture of 2 mm and fissure inclinations ranging from 0° to 90° and were tested at −10 °C under multistage cyclic dynamic loading followed by static triaxial compression. The dataset is organized into three folders. The “1.Experimental results” folder contains the experimental results used to analyse the stress response, hysteretic behaviour, dissipated energy, dynamic elastic modulus, damping ratio, and post-cyclic peak deviatoric stress of specimens with different fissure inclinations. Specimens inclined at 30°–60° experienced premature instability during cyclic loading and therefore do not have post-cyclic static strength values. The “2.Numerical_data” folder contains the PFC3D numerical results used to examine stress evolution, crack development, displacement characteristics, peak deviatoric stress, and failure modes under cyclic dynamic loading followed by static loading. These data enable comparison between the experimental and numerical responses of specimens with different fissure inclinations. The “3.SEM” folder contains scanning electron microscopy images used to characterize microscopic damage features, including ice crushing, ice–rock interface debonding, contact deterioration, and microcrack development. Together, the experimental, numerical, and SEM data support the analysis of inclination-dependent damage evolution and strength degradation in ice-filled fissured rock-like specimens.

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Steps to reproduce

The dataset is organized into three folders: “1.Experimental results”, “2.Numerical_data”, and “3.SEM”. The files should be used in the following sequence. Open the “1.Experimental results” folder to access the experimental data obtained from the multistage cyclic dynamic loading followed by static triaxial compression tests. The specimens are identified according to fissure inclination and testing condition. Use the time, axial strain, deviatoric stress, cycle number, and loading-stage data to reproduce the stress–time curves, stress–strain curves, and representative hysteresis loops. Dissipated energy, dynamic elastic modulus, and damping ratio can be recalculated using the equations and definitions provided in the associated manuscript. Post-cyclic peak deviatoric stress should be determined only for specimens that completed the prescribed cyclic loading and subsequently entered the static loading stage. Specimens inclined at 30°–60° became unstable during cyclic loading and should therefore be classified as premature cyclic instability specimens rather than being assigned post-cyclic strength values. Open the “2.Numerical_data” folder to access the PFC3D model files, contact parameters, loading scripts, crack-tracking files, and simulation outputs. The numerical calculation should be performed in the following order: model generation, contact-model and parameter assignment, confining-pressure application, multistage cyclic loading, subsequent static loading, and crack or displacement output. The simulated stress response, peak deviatoric stress, crack distribution, and failure mode can then be compared with the corresponding experimental results for each fissure inclination. The PFC3D version, contact models, microscopic parameters, boundary conditions, and loading conditions are provided in the associated files and manuscript. Open the “3.SEM” folder to access the scanning electron microscopy images. The images should be interpreted according to fissure inclination, sampling position, magnification, and specimen condition. The scale bars and magnification information provided in the images should be retained during analysis. These images can be used to compare ice crushing, ice–rock interface debonding, particle or cement breakage, and microcrack development among specimens with different fissure inclinations. The experimental, numerical, and SEM results should be matched using the specimen inclination and specimen identifier. No additional filtering, smoothing, or modification should be applied to the raw experimental data unless explicitly stated in the associated manuscript or data files.

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Earth Sciences, Geotechnical Engineering

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