Method for evaluating life gain of three-dimensional additive after repair

An evaluation method and technology of life, applied in the field of fatigue test, to achieve the effect of simple test

Pending Publication Date: 2020-03-27
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide an evaluation method of life gain after three-dimensional additive repair to solve or alleviate at least one of the problems in the background technology

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  • Method for evaluating life gain of three-dimensional additive after repair
  • Method for evaluating life gain of three-dimensional additive after repair
  • Method for evaluating life gain of three-dimensional additive after repair

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Embodiment Construction

[0021] In order to make the purpose, technical solution and advantages of the application more clear, the technical solution in the embodiment of the application will be described in more detail below in conjunction with the drawings in the embodiment of the application.

[0022] In order to solve the problems raised in the background technology, this application proposes an evaluation method for life gain after three-dimensional additive repair, which can accurately evaluate the life of three-dimensional additive repair.

[0023] Such as figure 1 As shown, the evaluation method of life gain after three-dimensional additive repair provided by this application includes the following steps:

[0024] S1. Prefabrication of cracks

[0025] Such as figure 2 As shown, firstly, a fatigue weak area is set on the test piece 1, which is the stress concentration area 2, and the fatigue weak area on the test piece 1 can be generated by applying periodic fatigue loads to the test piece t...

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Abstract

The invention provides a method for evaluating the life gain of a three-dimensional additive after repair, and the method comprises the steps: applying a periodic fatigue load to a test piece, and obtaining a naturally generated crack which is the same as or similar to a crack before repair; carrying out three-dimensional additive repair on the test piece with the naturally generated cracks; carrying out fatigue examination on the repaired test piece to obtain the fatigue life of the test piece, and carrying out fatigue examination on an unrepaired test piece with cracks to obtain the unrepaired fatigue life of the test piece; and determining the life gain caused by repair according to the repaired fatigue life and the unrepaired fatigue life. The method for evaluating the of a three-dimensional additive after repair has the characteristics of simple test and high efficiency, and can accurately evaluate the effect of three-dimensional additive repair through minimum resource consumption.

Description

technical field [0001] The application belongs to the field of fatigue testing, and in particular relates to a method for evaluating life gain after three-dimensional additive repair. Background technique [0002] The main load-bearing components of the aircraft body are prone to fatigue cracks due to the heavy load, and once damaged, it will directly endanger flight safety. This type of component has a complex structure, narrow construction access, and is often in a fuel environment, so the restrictions on crack repair methods are relatively strict. The traditional bolted joint reinforcement and adhesive reinforcement repair methods, as well as friction stir welding, are not competent. Therefore, a three-dimensional additive repair method for the main load-bearing component was proposed. This method is based on the principle of jet flow. The sprayed particles are driven by high-pressure gas to form a high-speed particle jet, which collides with the component to be repaired...

Claims

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Application Information

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IPC IPC(8): G01N3/32
CPCG01N3/32G01N2203/0062G01N2203/0066G01N2203/0073G01N2203/0641
Inventor 管宇陈亮牛会杰
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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