Multi-size rock test piece rapid heating device for SHPB (split Hopkinson pressure bar) impact test

Abstract

A multi-size rock test piece rapid heating device for SHPB (split Hopkinson pressure bar) impact test comprises a test box. The test box comprises a box body and a box body cover, one side of the boxbody is connected with the box body cover through hinges, the test box is provided with a through hollow channel, a wheel assembly is symmetrically arranged at the bottom of the hollow channel along acentral line, two sides of the hollow channel on the box body are connected with heating wire arc coils through heating wire fixing rods, a heating wire arc coil is arranged in the box body and corresponds to the bottom of the hollow channel, an insulation board switch and an insulation board matched with the hollow channel are arranged on the box body, and the insulation board switch is connected with the insulation board to control opening and closing of the insulation board. Rock test pieces are uniformly heated in the heating process, whole-process control and automated constant temperature management are performed, the device is wide in applicable range, efficient in heating and simple to operate and can meet the requirements of the test pieces with different sizes, and electric energy consumption is effectively reduced.

Description

technical field [0001] The invention relates to a rock dynamics separation type Hopkinson bar indoor test device, in particular to a rapid heating device for multi-size rock test pieces used in SHPB impact tests. Background technique [0002] So far, in the high strain rate test of rock dynamics, the SHPB test is usually used to study the deformation and failure of rock samples to simulate the deformation and failure of rock under strong earthquakes. [0003] However, there are few researches on the heating device and method of SHPB test. There are two main types: one is to heat the test piece and part of the probe in the temperature box at the same time, and the other is to heat the test piece separately first. , Quickly install the specimen in the system before the experiment. For the former method, Chinese patent 2012105670369 discloses a rapid heating method for specimens, which introduces the design of ceramic rods with the same outer diameter on the incident rod and t...

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: The present invention provides a rapid heating device for multi-size rock specimens used in SHPB impact tests, which solves the problem of uneven heating of existing devices, high test requirements, small applicability range, slow heating speed, and temperature errors easily caused by the experimental process , the problem of large power consumption

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