System and method for indirectly measuring stress distribution of assembly combined surfaces

Abstract

The invention discloses a system and a method for indirectly measuring stress distribution of assembly combined surfaces. The system comprises pressure sensing paper, strain gages, a pressure sensor, a display device, a scanner and a computer. The method includes firstly constructing the correspondence between the stress of the adjacent sides and the stress distribution of the combined surfaces, placing the pressure sensing paper between the combined surfaces of a part I and a part II for some time and taking the paper out, scanning the color distribution condition of the pressure sensing paper to be images inputted into the computer by the scanner, drawing a stress contour map of the combined surfaces by the computer, and affixing the strain gages on the extending lines of the stress contour on the adjacent sides; determining the stress distribution of the combined surface by measuring the stress of the stress gages. The method provided is a novel method for measuring the stress distribution of the assembly combined surfaces, and the method for measuring is low in cost in measurement of the stress distribution and is simple.

Description

technical field [0001] The invention relates to the technical field of assembly measurement, in particular to a system and method for indirect measurement of stress distribution on an assembly joint surface. Background technique [0002] All kinds of machinery are assembled from various parts according to specific requirements, and the surface where the parts are combined and contacted is called "joining surface". The study found that the mechanical properties of the joint surface have a significant impact on the overall characteristics of the mechanical equipment, and the stiffness, damping, and static deformation of the mechanical equipment all come from the joint surface. The stress distribution law of the joint surface is an important aspect of the joint surface characteristics, which has an important impact on the static and dynamic characteristics of the joint surface. [0003] The existing methods for measuring the stress distribution of the joint surface mainly incl...

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Problems solved by technology

[0005] The present invention aims at the problem that the stress testing equipment on the joint surface of the equipment is expensive during operation, the cost is high, and the operation is complicated due to the influence of the geometric characteristics of the contact interface and the installation position, etc., and proposes a system for indirect measurement of the stress distribution on the joint surface of the assembly and method, the present invention utilizes the continuity principle of stress distribution to establish the corresponding relationship between the adjacent side stress and the joint surface stress distribution, and determine the stress distribution of the joint surface by measuring the stress on the adjacent side surface

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