Large-scale MTS cyclic loading single multi-specimen test device and discreteness identification method

Abstract

The invention discloses a large-scale MTS cyclic loading single multi-specimen test device and a discreteness identification method of the large-scale MTS cyclic loading single multi-specimen test device, and belongs to the field of experimental equipment. The large-scale MTS cyclic loading single multi-specimen test device comprises a base fixedly mounted in the position having a certain distance away from the lower part of an MTS loading head, a bearingplatform arranged above the base through telescopic supporting rods and comprising a lower panel, an upper panel and web plates, multiple specimen fixing devices annularly fixed at the center of the upper surface of the upper panel in uniformly distributed manners, and comprising sleeves and deformation layers, a load distribution device located between the MTS loading head and the specimen fixing devices and comprising a lower load plate and an upper load plate and a data acquisition system comprising axial force meters, collecting boxes and conducting wires. The large-scale MTS cyclic loading single multi-specimen test device can cyclically load multiple specimens simultaneously to save time, only when data collected by the corresponding collection boxes are consistent, the batch of the specimens can be considered to be tested under same conditions, and therefore, the discreteness of the test can be effectively lowered. Furthermore, the device has the characteristics of free disassembly and assembly and flexible operation.

Description

technical field [0001] The invention belongs to the technical field of experimental equipment, and relates to an experimental equipment, in particular to a large-scale MTS cyclic loading single-time multi-sample test device and a discreteness identification method, which are mainly used for cyclic loading tests on rock materials. Background technique [0002] Most problems in rock mechanics are static problems. However, during the excavation and future operation of the project, it is inevitable to be subjected to other rapidly changing loads or periodically changing loads such as explosions, shocks, vibrations, and earthquakes. The dynamic stress or stress pulse is often much larger than the static stress that the rock mass bears. Therefore, it is very necessary to study the fatigue characteristics of rock under these dynamic loads. [0003] In the existing research on rock fatigue damage, some scholars use indoor MTS to carry out cyclic loading under quasi-dynamic strain ...

AI Technical Summary

Problems solved by technology

[0003] In the existing research on rock fatigue damage, some scholars use indoor MTS to carry out cyclic loading under quasi-dynamic strain rate, but limited by the loading strain rate, they cannot really achieve dynamic loading; most scholars use rock dynamic triaxial loading, which A method for dynamic loading of a single specimen

Although this method achieves dynamic loading, it is limited by the number of samples loaded in each test, and the test efficiency is not good

Images