Dynamic Modeling of Composite Boring Bars Considering Different Boundary Conditions

Boring bar for deep hole cutting is often more prone to flutter problems. The traditional boring bar is generally made of metal material. There is a close relationship between the dynamic characteristics of the boring bar and the tightness of the fixed end. In this paper, based on Euler-Bernoulli be...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2018-07, Vol.382 (3), p.32026
Main Authors: Ren, Yongsheng, Feng, Wenliang, Ma, Bole
Format: Article
Language:English
Subjects:
Beam theory (structures)
Boring
Boundary conditions
Differential equations
Dynamic characteristics
Dynamic models
Euler-Bernoulli beams
Flutter
Resonant frequencies
Stiffness
Tightness
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Summary:Boring bar for deep hole cutting is often more prone to flutter problems. The traditional boring bar is generally made of metal material. There is a close relationship between the dynamic characteristics of the boring bar and the tightness of the fixed end. In this paper, based on Euler-Bernoulli beam theory, the distributed parametric differential equations of composite boring bar are prensented. The dynamic characteristics of composite boring bar with three different conditions including fixed-free, pinned-pinned-free and spring-spring-free are investigated. The corresponding frequency equations are given. The natural frequency and dynamic stiffness of the composite boring bar are obtained by numerical calculation. The influences of the supporting conditions and the ply angle are studied. The results show that the supporting conditions, layer angle, support spring stiffness and support spacing have an important effect on the dynamic characteristics of the composite boring bar.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/382/3/032026