Vibration Response of Tubular Joints Using a Simplified Mass-Spring Model

Khalid H Almitani,Ramzi Othman,Shaalan A Alqarni

doi:10.24018/ejers.2019.4.12.1628

Abstract

Using adhesives for joining tubular structures has been widely used to replace the traditional joining methods of welding, brazing, soldering, etc. The unique features associated with adhesives include low manufacturing cost, long components’ life, and lightweight. The goal of this study is to investigate the vibration response of the tubular joints when they are subjected to a harmonic axial load considering that the shear stress is linear through the thickness. A simplified mass-spring model is applied to study the response of the problem analytically. Finite element method (FEM) using ANSYS is then availed to validate and compare results obtained in the analytical approach. Additionally, some parameters such as overlap length and adherent material will be changed to examine their influence on the frequency response. Results and findings achieved analytically and numerically showed that the natural frequencies increase as the adherent wave velocity increases, whereas they decrease as the overlap length increases.

Highlights

There is often a complex deformation state for any structural material, such as tubular joints under concentrated linear shear stress, which may promote cracks or other defects to occur along the bonded joints
The adhesive application is often used with precaution due to lack of reliable information regarding their behaviors when subjected to linear shear stress, especially that concerned Earlier study on tubular joints was done by Volkersen [6]
Different overlap length will be applied to assess the effects of geometry on the natural frequency

Summary

Introduction

There is often a complex deformation state for any structural material, such as tubular joints under concentrated linear shear stress, which may promote cracks or other defects to occur along the bonded joints. The utilization of adhesives has been found to reduce the production cost, as well as to make components’ life longer by decreasing the response to vibrations The characteristics of these adhesive materials are remarkable, and they are regarded a limiting factor in bonding in many cases. These significant weaknesses led to the need to produce better adhesives and appropriate surface processing equipment to make adhesive surfaces effective [4, 5] Despite these merits, the adhesive application is often used with precaution due to lack of reliable information regarding their behaviors when subjected to linear shear stress, especially that concerned Earlier study on tubular joints was done by Volkersen [6]. These studies revealed critical zones that may trigger failure in the joints

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Conclusion