Influence of fluid composition on fracture toughness and frictional strength weakening: Sandstone brittle and ductile strength constraints

This is the ReadMe file corresponding to the dataset of the study entitled:"Influence of fluid composition on fracture toughness and frictional strength weakening: Sandstone brittle and ductile strength constraints"By Noël C., Baud P., Lazari F., Shahin G. & Violay M. This Read-Me file was last edited in February 2026 This readme file describes the data repository and supplementary files accompanying the above publication, submitted to IJRMMS. For any further queries, please contact [e-mail] For each type of experiment (fracture toughness or friction), a zip file contains the files of the experiments. Each file name contains the information of the sample tested and the experimental condition (dry or saturated):- The first letters and number stands for the sample tested (e.g., AS1)- After a "_", the experimental conditions are described: dry = dry experiments, water = water saturated experiments, NaCl = saturated with the saline solution, HCl = saturated with the acid solution, NaOH = saturated with the basic solution, HCl_dry = saturated with the acid solution then dried, NaOH_dry = saturated with the basic solution then dried.- The last letter is for the experiment performed: K=Fracture toughness, F=Friction *** Fracture toughness ***Each .txt file contains:- Column 1: Time (s)- Column 2: Mode I stress intensity factor KI (MPa.m(1/2))- Column 3: Axial displacement (mm)- Column 4: Crack mouth opening (mm) *** Friction ***Each .txt file contains:- Column 1: Time (s)- Column 2: Shear stress (MPa)- Column 3: Normal stress (MPa)- Column 4: Shear displacement (mm) Additionally, for each experiment and both under dry and water saturated conditions, a .xlsx file contains the picked static shear stress at the onset of sliding for each tested normal stress as follows:- Column A: Normal stress (MPa)- Column B: Shear stress at onset of sliding (MPa)- Column C: Shear stress at onset of sliding lower boundary (MPa)- Column D: Shear stress at onset of sliding higher boundary (MPa)- Column E: Peak shear stress (MPa)- Column F: Peak shear stress lower boundary (MPa)- Column G: Peak shear stress higher boundary (MPa)