Mechanical testing and modeling data from the Songliao Basin sandstones for strain localization analysis.

This dataset contains mechanical testing and numerical modeling data from sandstone samples collected at depths of 1000–3500 meters in the Songliao Basin, northeastern China. Triaxial tests were conducted under both conventional and reconstructed in-situ stress conditions using the ISRR (In-situ Stress Restoration and Reconstruction) method. All data files are organized according to figure and table numbers from the associated manuscript and supplementary information. Each file corresponds directly to a specific figure or table.