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An Artificial Simulation Method for Fatigue Cracks of Bolt Comparison Test Blocks

A fatigue crack and contrast test block technology, applied in instruments, measuring devices, scientific instruments, etc., to achieve the effect of easy processing and accurate flaw detection

Active Publication Date: 2019-04-23
CHINA AIRPLANT STRENGTH RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention is aimed at the problem that there is a large area difference between the simulated fatigue crack surface and the real fatigue crack surface on the artificially cut surface of the comparison test block of the existing molybdenum wire cutting ultrasonic bolt, and the research aims at the comparison of the size of the simulated fatigue crack surface which is closer to the real fatigue crack surface The method of making the test block, its purpose is to provide a reliable ultrasonic testing comparison test block for the connecting bolts on the aircraft

Method used

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Embodiment Construction

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. Embodiments of the present invention will be described in detail b...

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Abstract

The invention relates to a method for manual simulation of fatigue cracks of a reference block of a bolt. The bolt is processed with a central rotating circle or circular arc cutter, and an arc fatigue crack section which is same as a fatigue section is processed. By means of the method for manual simulation of the fatigue cracks of the reference block of the bolt, a natural crack reflection surface at a bolt fracture can be really and effectively simulated, crack detection of the bolt is more accurate, and the method has the advantages of being simple, accurate and easy to process and the like.

Description

technical field [0001] The invention belongs to the technical field of fatigue flaw detection, and in particular relates to a method for artificially simulating fatigue cracks of a bolt comparison test block. Background technique [0002] Docking bolts are the key load-bearing components on the aircraft. The aircraft fuselage is docked with the central wing, the horizontal stabilizer and vertical stabilizer are docked with the fuselage, the inner and outer pillars of the main landing gear are connected with the fuselage, and the engine mounting bracket is connected with the load-bearing frame. And so on are bolted connections. The safety of these butt bolts is related to the flight and test safety of the whole aircraft. [0003] For example, in an aircraft fatigue test, the flat tail is fixed on the fuselage by connecting bolts. The design life of the whole aircraft is 14,000 flight hours, and the flat tail connecting bolts break after 4,500 hours. According to the force a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/30
CPCG01N29/30G01N2291/2691
Inventor 彭智伟黄华斌石磊徐矛张雪奇
Owner CHINA AIRPLANT STRENGTH RES INST
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