Experimental device and experimental method for simulating multi-stage deformation of stretching structure wedge body

The invention provides an experimental device and an experimental method for simulating multi-stage deformation of a stretching structure wedge body, a stretching structure simulation sand box of the device comprises an inclined side plate and bottom plastic cloth, the bottom plastic cloth is located on the inclined side plate, a first driving device is connected to the stretching structure simulation sand box, and a second driving device is connected to the stretching structure simulation sand box. The stretching control device comprises a driving module and adjustable plastic cloth, the driving module is connected to the adjustable plastic cloth, the adjustable plastic cloth is located on the inclined side plate and the bottom plastic cloth, an experimental material is located on the adjustable plastic cloth and the bottom plastic cloth, and the movement rate of the first driving device and the movement rate of the driving module are adjusted; the adjustable plastic cloth is arranged ...