Low-frequency ultrasonic vibration influence on the increasing stud connection release in the aircraft design elements
Authors: Minin S.I., Khamitsaev A.S., Terekhin A.V., Chulkov D.I., Filatov A.A.
Published in issue: #4(148)/2024
DOI: 10.18698/2308-6033-2024-4-2350
Category: Aviation and Rocket-Space Engineering | Chapter: Design, construction and production of aircraft
The paper considers influence of the low-frequency ultrasonic vibration on the release process of studs installed in the connected part on the thread lock. It presents design of the devices to introduce ultrasonic vibrations through the release stud end and side surfaces using the magnetostrictive transducer. The experimentally found efficiency of the developed devices in introducing the ultrasonic vibrations with the release of the M8×1.25 studs installed in an aircraft structural element on the VAK-1F adhesive composition is shown. It is established that heating that appears during the action of ultrasonic vibrations with a frequency of 22 kHz on the adhesive-mechanical threaded joint is not negatively affecting the aircraft structural elements and the protective coatings applied to it. In this case, reducing the stud release moment relative to the calculated value is up to 40% when introducing the ultrasonic vibrations from the end surface, and is up to 61% when introducing the ultrasonic vibrations at an angle to the stud side surface.
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