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Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 27, No. 3, pp.167-174

ISSN: 2508-5107 (Online)

Print publication date 15 Jun 2018

Received 13 Mar 2018 Revised 23 Apr 2018 Accepted 27 Apr 2018

DOI: https://doi.org/10.7735/ksmte.2018.27.3.167

볼트결합 구조의 부재 강성 연구

정현수^a^{, *} ; 한혜선^a ; 조재욱^a ; 박성우^a

Study on Member Stiffness of Bolt Joint Structure

Hyun Su Jung^a^{, *} ; Hye Sun Han^a ; Jae Uk Jo^a ; Sung Woo Park^a

aISR Mechanical R&D Lab, LIGNex1 Co., Ltd., 207, Mabuk-ro, Giheung-gu, Yongin, Gyeonggi-do, 16911, Korea

Correspondence to: ^*Tel.: +82-31-288-9468, Fax: +82-31-288-9122, E-mail address: Hyunsu.Jung@lignex1.com (Hyun Su Jung).

Abstract

Bolt joints are applied especially in equipment with severe temperature change during the operating. A change in the initial axial force of the bolt due to the dissimilar material of the members causes the performance deterioration of the equipment. The variation in the bolt axial force is influenced by the member stiffness. Many have studied the method of calculating the member stiffness in a bolt–nut joint. The studies have shown the same result for calculating the member stiffness in bolt joints. Bolts of sizes M4 to M8, and the thickness and material of various members were considered in the case study. Through finite element analysis, the analytical solution of member stiffness is calculated. An equivalent pressure cone model is used to calculate the theoretical solution. The analytical result and theoretical solution were almost equal. Additionally, we proposed a formula to calculate the member stiffness relatively easily in various cases.

Keywords:

Bolted joint, Member stiffness, FEA, Contact

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