Normal stiffness and hysteresis characteristic test experimental device for double-bolt joint surface

Abstract

The invention relates to a joint surface normal mechanical property experimental device, in particular to a normal stiffness and hysteresis characteristic test experimental device for a double-bolt joint surface. The normal stiffness and hysteresis characteristic test experimental device for a double-bolt joint surface comprises two T-shaped rods 1, a locating bracket 2, bolts 3 for testing, an eddy current displacement sensor 4 and an eddy current sensing bracket 5, wherein the two T-shaped rods 1 are respectively connected with the locating bracket 2 and the eddy current sensing bracket 5 by locating bolts; the eddy current displacement sensor 4 is fixed on the locating bracket 2 and is used for measuring the deformation of the joint surface; the two T-shaped rods 1 are connected by two sets of high-strength hexagon headed bolt assemblies for steel structures, which pass through the through holes of the T-shaped rods, the top of each bolt is provided with a hole, a strain gauge is installed on the inner side of each hole, and the pretightening force is measured by the strain gauges. The experimental device has the characteristics of simple structure, convenience in assemble and disassemble and easiness in repeated test, and capability of accurately collecting the relevant data of mechanical properties of the bolt joint surfaces.

Description

technical field [0001] The invention belongs to the field of digital manufacturing of mechanical design, and relates to an experimental device for normal mechanical properties of joint surfaces, in particular to an experimental device for researching normal mechanical properties and normal hysteresis properties of double-bolt joint surfaces. Background technique [0002] The contact surfaces between components are called "joint surfaces". There are a large number of joint surfaces in the current mechanical structure. The contact stiffness and contact damping of the joint surface are important components of the overall stiffness and damping of the mechanical structure, which affect the performance of the entire machine, and the existence of damping is the cause of hysteresis. The most typical and common form of the joint surface is the bolted joint surface. Therefore, it is necessary to study the mechanical properties of the bolted joint surface. [0003] There are many fac...

AI Technical Summary

Problems solved by technology

At present, the experimental devices used in the research of various relevant institutions are somewhat complicated in structure, which increases the difficulty of repeated tests, and consumes time and energy; some cannot obtain accurate data, including the pre-tightening force loaded by the bolts and the experimental data obtained at the end of the experiment, and the experimental accuracy. needs improvement

Images