Thermal coupling loading testing machine using CT (computed tomography) for real-time microscomic scanning on rock

Abstract

The invention relates to a thermal coupling loading testing machine using CT (computed tomography) for real-time microscomic scanning on rock, and belongs to the technical field of rock mechanics and rock test. The testing machine comprises an upper press cover, a lower press cover, a sleeve cylinder and a rotary base, wherein the upper press cover and the lower press cover are respectively connected with the upper end and the lower end of the sleeve cylinder; an upper press head and a lower press head are arranged in the sleeve cylinder, the upper press head is arranged at the lower surface of the upper press cover, the lower press head is arranged at the upper surface of the lower press cover, the lower surface of the upper press head is parallel with the upper surface of the lower press head, and is vertical to the axis of the sleeve cylinder, a through hole is formed in the upper press head in the axis direction of the sleeve cylinder, and a heat source generation device is arranged in the first through hole; a second through hole and a third through hole are formed in the lower press cover in the axis direction of the sleeve cylinder; the lower press cover is fixedly arranged on the rotary base, a hydraulic control system is arranged in the rotary base, the hydraulic control system is connected with an axial pressure pipeline and a confining pressure pipeline, the axial pressure pipeline is connected with the second through hole, and the confining pressure pipeline is connected with the third through hole. The testing machine has the advantage that while a rock specimen is continuously loaded, the CT scanning is also performed.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics and rock testing, in particular to a thermomechanical coupling loading testing machine which uses CT to scan rocks in real time. Background technique [0002] During the rock loading test, as the pressure on the rock gradually increases, the interior of the rock will gradually break, making the strength of the rock specimen gradually decrease until the rock finally fails. The study of the mechanical characteristics of the rock is to infer the failure process of the rock according to the relationship between the pressure and the displacement of the rock specimen measured by the rock testing machine, and in the development process of the rock failure, the generation, expansion and penetration of cracks play a key role. effect. [0003] In recent years, in order to deeply study the failure process of rocks, rock mechanics researchers at home and abroad usually use photographic means to observ...

AI Technical Summary

Problems solved by technology

However, due to the huge equipment of conventional rock testing machines, most of them are designed for standard specimens with a size of Ф50mm×100mm. These testing machines are driven by electric motors with worm gear reducers, and then drive two lead screws through synchronous toothed belts to drive the moving beam up and down. , so it is impossible to use CT equipment to observe the cracking process of the rock specimen in real time. The loaded specimen can only be removed from the testing machine for scanning, and then the specimen is loaded into the testing machine and scanned again after loading, and so on.

The direct impact of this operation is that it cannot reflect the continuous loading and deformation process of the rock, and the operation is cumbersome and troublesome.

In addition, in the process of repeated loading, unloading, and moving, it is easy to cause unnecessary damage to the specimen

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