Pin load measurement method and device, measuring instrument and storage medium

Abstract

The embodiment of the invention discloses a pin load measurement method and device, a measuring instrument and a storage medium. The method includes the following steps: under two circumstances of notapplying a load to a composite material connecting piece and applying a specific load, obtaining three-dimensional position coordinates of each projection line, on a first surface of a connecting plate, of a cross section tangent with side walls of each pair of connecting holes in the connecting piece to obtain initial position parameters and extrusion position parameters; according to the difference values of extrusion position parameters and the initial position parameters of the projection lines corresponding to each pair of connecting holes and the sum of the difference values of the extrusion position parameters and the initial position parameters of the projection lines corresponding to all the connecting holes, determining a deformation ratio of each pair of connecting holes; and according to the deformation ratio and the applied load, obtaining a pin load value of each pair of connecting holes. By adoption of the abovementioned technical scheme, a noncontact mode is adopted todirect measure pin load distribution in the composite material connecting piece, a measuring error is reduced, cost of pin load measurement is reduced, and thus wide-range use is facilitated.

Description

technical field [0001] The embodiments of the present invention relate to the field of testing, and in particular, to a nail loading measurement method, device, measuring instrument and storage medium. Background technique [0002] With the replacement of aircraft, the application of composite materials in aircraft structures has grown steadily, and has been applied to main load-bearing structures such as fuselages and wings. Due to limitations in design, technology, use and maintenance, it is usually necessary to use mechanical connections, especially nail connections, for load transfer. [0003] In the actual application process, due to the significant difference in the nail load distribution of the mechanical connection of the composite material compared to the metal structure, and the special property of the composite material as a brittle material, it is necessary to accurately calculate the The nail load distribution of . Before using the nail load distribution calcu...

AI Technical Summary

Problems solved by technology

However, the matching state of the metal rod and the nail hole has changed after slotting, which makes it difficult to characterize the specific distribution of the actual structure in the obtained nail load distribution; in addition, the metal groove in the metal rod weakens the bearing capacity of the sensor rod, making the sensor only It can be used under low-load conditions, which limits the application range of the sensor. At the same time, due to the difficulty of the manufacturing process, the manufacturing cost is relatively expensive and difficult to be widely used.

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