Stress-displacement curves of red sandstone under direct tensile and compressive splitting
Description
We provide data on the stress-displacement curves of red sandstone samples subjected to direct tensile and compressive splitting. The red sandstone sample used for the direct tensile experiments was machined into the shape of a dog bone, which was 110 mm high, with a maximum radius of 64 mm at each end and a minimum radius of 40 mm at the center; its sides were machined into a smooth surface with a radius of curvature of 100 mm. The red sandstone sample used for the Brazilian splitting experiments was machined into a disk shape with a diameter of 40 mm and a thickness of 20 mm. In the direct tensile experiment, the upper loading plate was fixed in position, and the lower loading plate was moved downward at a speed of 0.05 mm/min until the dog bone-shaped sample was cracked and damaged from the middle under the tensile action, and the damage surface was perpendicular to the loading direction. In the Brazilian splitting experiment, the upper loading plate was also fixed, and the lower loading plate moved upward at a speed of 0.05 mm/min, and the disc-shaped sample was extruded by the curved compression mold, and finally formed a rupture surface in the middle along the direction of loading and destroyed.