A test device and modeling method for obtaining the normal contact stiffness of the joint surface

A contact stiffness, testing device technology, applied in the direction of using stable tension/pressure to test the strength of materials, etc., can solve the problem of difficulty in accurately testing the normal contact stiffness of the joint surface and so on

Active Publication Date: 2017-02-01
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a test device and modeling method for obtaining the normal contact stiffness of the joint surface, which solves the problem that it is difficult to accurately test the normal contact stiffness of the joint surface in the prior art

Method used

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  • A test device and modeling method for obtaining the normal contact stiffness of the joint surface
  • A test device and modeling method for obtaining the normal contact stiffness of the joint surface
  • A test device and modeling method for obtaining the normal contact stiffness of the joint surface

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Embodiment Construction

[0087] The joint surface normal contact stiffness testing device and modeling method of the present invention will be further described in detail in conjunction with the working principle and the structural drawings below.

[0088] Such as Figure 1 to Figure 5 As shown, the present invention is a test device for obtaining the normal contact stiffness of the joint surface, including a lower test piece placement platform 1, an eddy current sensor support 2, a lower test piece 3, an upper test piece 5, an induction support 4, and a three-way force sensor 6. Hexagon socket head screw 8, test platform 9, screw rod 10, eddy current sensor, signal acquisition system and computer.

[0089] The test platform 9 includes a base 91 and a beam 92 located on the upper part of the base.

[0090] The lower test piece placement platform 1 is set on the base 91, and the top of the lower test piece placement platform 1 is provided with an inverted conical depression 101 with a small lower port...

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Abstract

The invention discloses a test device and a modeling method for obtaining the normal contact stiffness of a joint surface. The device includes a lower test piece placement platform, the lower test piece placement platform is set on the base, and a lower small is arranged on the top of the lower test piece placement platform. The upper large inverted conical depression; the top of the platform where the lower specimen is placed is provided with a first annular protrusion, and the center of the first annular protrusion coincides with the center of the inverted conical depression; the lower specimen is placed in the inverted conical depression, and the lower specimen One side of the spherical surface faces upward and is higher than the first annular protrusion, and the top of the lower test piece is in contact with the bottom of the upper test piece; the bottom of the upper test piece is provided with a second annular protrusion matching the first annular protrusion; the upper test piece A three-way force sensor is fixed on the piece, and the three-way force sensor is connected with the hexagon socket head screw; one end of the screw rod is connected with the socket head cap screw, and the other end passes through the beam of the test platform. The device has a simple structure, is convenient to assemble and disassemble, and is easy to repeat the test, and solves the problem that the normal contact stiffness of the joint surface is difficult to test and accurately model.

Description

technical field [0001] The invention belongs to the technical field of joint surfaces of mechanical structures, and relates to a testing device and a modeling method for obtaining normal contact stiffness of joint surfaces. Background technique [0002] The rich and complex dynamic characteristics of the binding surface mainly come from the interaction, mutual restriction and interdependence among countless asperities on the microscopic contact surface. The performance of this interaction in the dynamical system is the mutual coupling between the system state variables, so that there are not only a large number of local contact units on the joint surface, but also complex energy dissipation behaviors. The energy dissipation behavior has a sensitive dependence on the initial conditions of the mechanical structure system, and its change process has unstable randomness and irregularity in time and space. Therefore, from a microscopic point of view, it is necessary to study the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08
Inventor 李玲蔡安江阮晓光褚崴
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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