Deformable constraint cylinder torsional shear apparatus

The invention discloses a deformable constraint cylinder torsional shear apparatus in the field of rock-soil structure stress-strain analysis, and the deformable constraint cylinder torsional shear apparatus comprises a rack, a deformable constraint system, an image measurement system, an axial loading device, a torsion device, a sensor measurement system, a data acquisition system and a control system. A core component of the device is a deformable restraint system, and the system is composed of a thin-wall cylinder with the upper end and the lower end open and square corner point grids arranged on the outer wall of the cylinder. The stress state of the soil body can be controlled through axial pressure and upper torsion, and the loading path of the sample can be controlled through an axial loading rate and a torsion loading rate; the device can accurately describe the stress-strain relationship at the interface, and is suitable for unit experiments of indoor interface shearing. 本发明公开了岩土结构应力应变分析领域的一种可变形约束圆柱扭