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Research Papers: Materials and Fabrication

Experimental Investigation on Mechanical Properties of Plastic Pipes Reinforced by Cross Helically Steel Wires

[+] Author and Article Information
Jinyang Zheng1

Institute of Chemical Machinery and Process Equipment, Zhejiang University, Hangzhou 310027, P.R.C.jyzh@zju.edu.cn

Yubin Lu, Li Xiang, Xiufeng Lin, Yancong Zhu

Institute of Chemical Machinery and Process Equipment, Zhejiang University, Hangzhou 310027, P.R.C.

Ping Xu

Department of Mechanics,  Zhejiang University, Hangzhou 310027, P.R.C.

Defu Chen, Xiaolian He, Taiqing Shao

 Wenzhou Huangsheng Pipe Industrial Co., Ltd., Wenzhou 325011, P.R.C.

1

Corresponding author.

J. Pressure Vessel Technol 130(2), 021401 (May 15, 2008) (7 pages) doi:10.1115/1.2892028 History: Received January 15, 2007; Revised August 07, 2007; Published May 15, 2008

A Polyethylene (PE) pipe reinforced by a cross-winding steel wire (PSP) is a new type of plastic-matrix steel composite pipe, which has excellent performance. Its short-time burst pressure, strain, critical buckling pressure, and failure mode under various temperatures were investigated. Experimental results show that PSP has an increase of short-time burst pressure at room temperature up to 129%, ring stiffness up to 19%, and critical buckling pressure up to 57% in comparison with a comparable PE pipe. Failure modes of PSP subjected to internal pressure under various temperatures are found to be ductile burst and excessive deformation, and their transition temperature is about 45°C. Moreover, at the same pressure, the radial expansion ratio of PSP only bearing radial force is much larger than that of PSP bearing both radial and axial forces.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

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Figure 1

Structure of the PSP

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Figure 2

Equipment for a short-time burst test at various temperatures

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Figure 3

Schematic diagram of locations of the measuring points of axial deformation ratio, radial expansion ratio, and strains

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Figure 4

Equipment for measuring axial deformation ratio, radial expansion ratio, and strain

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Figure 5

Equipment for the buckling test

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Figure 6

Short-time burst pressure of the PSP versus temperature

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Figure 7

Burst failure modes of the PSP at various temperatures

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Figure 8

(a) Axial deformation ratio at various internal pressures only exerting in the radial direction, (b) axial deformation ratio at various internal pressures exerting both in the radial and the axial direction, (c) radial expansion ratio under two conditions. Condition 1: load only exerting in the radial direction; condition 2: load exerting both in the radial and the axial direction.

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Figure 9

(a) Strain versus internal pressure under the third cycle, (b) strains versus internal pressure under the eighth test

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Figure 10

Comparison of compressive deformation between the PSP and PE pipes

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Figure 11

(a) Curve of outflow volume against the external pressure of the PSP, (b) curve of outflow volume against the external pressure of the PE pipes

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Figure 12

(a) Buckling shape of the PSP, (b) buckling shape of the PE pipes

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