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Structural member strain measurement method and system

A technology of strain measurement and structural parts, applied in the direction of measuring devices, instruments, optical devices, etc.

Inactive Publication Date: 2020-09-11
BEIJING XINGJI RONGYAO SPACE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the present invention aims to solve the problem of how to measure the stress of a structural member, thereby providing a method and system for measuring the strain of a structural member

Method used

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  • Structural member strain measurement method and system
  • Structural member strain measurement method and system
  • Structural member strain measurement method and system

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Embodiment 1

[0033] Such as Figure 1 to Figure 3 As shown, a method for measuring the strain of a structural member provided in this embodiment, in this embodiment, the object of use of the method for measuring the strain of a structural member is a spacecraft structural member, so as to facilitate the detection of the stress deformation of an aerospace member, Or the distribution of internal stress during processing. This ensures the stability of the product quality of spacecraft structural parts.

[0034] It includes the following steps:

[0035] S1: Prepare the structure to be tested with stress-chromic materials. The structural part to be tested is made of stress-chromic material, and the color change characteristic of the stress-chromic material is used to facilitate researchers or designers to observe the strain position and the strain degree of the strain position of the structural part to be tested.

[0036] Specifically, the stress-chromic material in this embodiment is a colo...

Embodiment 2

[0049] This embodiment provides a strain measurement system for structural parts, including: an additive manufacturing system, used to realize the structural molding of stress-chromic materials, and adopt the strain measurement method for structural parts in the above-mentioned embodiment 1 after the structural parts to be measured are formed. The strain is measured to realize the measurement of the residual stress of the structural part to be tested prepared by the additive manufacturing technology. The measured residual stress is caused by the limitation of the processing technology and the cooling and shrinkage of the material layer by layer, resulting in the deformation of the structure over time. Its role can be It is directly reflected on the structural part to be tested after forming. The measurement results can be used in theoretical calculation models to help processing personnel adjust processing parameters according to the distribution of residual stress, thereby red...

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Abstract

The invention relates to the technical field of structural stress measurement, in particular to a structural member strain measurement method and system. The structural member strain measurement method comprises the following steps of preparing a to-be-measured structural member from a stress discoloration material, applying stress to the to-be-measured structural member according to detection requirements, and judging the strain condition of the to-be-measuredstructural member according to the color change condition of the to-be-measured structural member. According to the structural member strain measurement method, the to-be-measured structural member is prepared from the stress discoloration material, and different colors can be visually displayed on the to-be-measured structural member according to the stress discoloration characteristic of the stress discoloration material when the to-be-measured structural member is stressed. The stress strain condition of the to-be-detected structural member can be judged according to the color change condition of the to-be-detected structural member.

Description

technical field [0001] The invention relates to the technical field of structural stress measurement, in particular to a method and system for measuring the strain of a structural member. Background technique [0002] Strain refers to the local relative deformation of an object under the action of external force or non-uniform temperature field and other factors, which is directly related to the stress of the mechanical structure and is used as the main evaluation standard for structural damage and failure. [0003] The strain measurement technology is mostly the resistance strain gauge method: the resistance strain gauge is pasted on the surface of the measured structure, the resistance value of the strain gauge is linearly related to the strain of the structure surface, and the structure surface strain can be obtained by measuring the resistance change of the strain gauge. However, this method can only measure the surface strain of the structure point by point. In the case...

Claims

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Application Information

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IPC IPC(8): G01B11/16
CPCG01B11/16
Inventor 彭小波郑立伟王天舒
Owner BEIJING XINGJI RONGYAO SPACE TECH CO LTD