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Research Papers: Design and Analysis

Axial Stiffness Analysis of Corrugated Tubes

[+] Author and Article Information
Caifu Qian1

 Beijing University of Chemical Technology, Beijing 100029, Chinaqiancf@mail.buct.edu.cn

Cunzheng Sun, Jinhua Xiao

 Beijing University of Chemical Technology, Beijing 100029, China

1

Corresponding author.

J. Pressure Vessel Technol 132(2), 021206 (Mar 30, 2010) (4 pages) doi:10.1115/1.4000635 History: Received October 20, 2008; Revised October 13, 2009; Published March 30, 2010; Online March 30, 2010

In this study, axial stiffness analysis of corrugated tubes was carried out numerically and experimentally. By performing axial loading-displacement analysis, a so-called stiffness weakness factor Kf for the corrugated tube was proposed and formulated. Both corrugated and smooth double-tube heat exchangers were designed and tested under thermal loadings. Results show that the proposed formula for the stiffness weakness factor Kf is accurate enough for the engineering application of the corrugated tubes in constructing heat exchangers.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Geometry of the corrugated tube

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Figure 2

Mesh of the corrugated tube in one wave

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Figure 3

Influence of the wavelength D on the stiffness weakness factor Kf

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Figure 4

Influence of the radius R1 on the stiffness weakness factor Kf

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Figure 5

Structure of the corrugated double-tube exchanger

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Figure 6

Experimental results of the axial stresses for the two double-tube exchangers under thermal loadings

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Figure 7

Comparison of the axial stresses when the corrugated tube is replaced by a stiffness-weakened smooth tube

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