Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/58298
Title: Flow-forming of super-tough polypropylene pipes using a twin motor-driven rollers setup
Authors: Lee, K.S. 
Lai, M.O. 
Chen, C.M.
Keywords: Flow-forming
Plastics industry
Polypropylene
Issue Date: Mar-1997
Source: Lee, K.S.,Lai, M.O.,Chen, C.M. (1997-03). Flow-forming of super-tough polypropylene pipes using a twin motor-driven rollers setup. Journal of Materials Processing Technology 65 (1-3) : 228-236. ScholarBank@NUS Repository.
Abstract: For decades, the flow-forming process has been well investigated and widely applied in the metal-forming industry. This research begins with the intention to apply the flow-forming process to the plastics industry. An understanding of the deformation characteristics of the polymer material related to the process is thus necessary. For this purpose, a conventional lathe machine was modified and a specially-designed setup fabricated for the flow-forming experiments. Polypropylene pipes were employed in the present study. Mechanical testing has shown remarkable improvement over the original un-flow-formed material. The tensile yield strength and ultimate tensile strength of the flow-formed pipes increased significantly with percentage thickness reduction, especially those along the direction of the helix line. The hydrostatic burst test, which is the overall test for the flow-formed pipes, shows clearly that the hoop strength increases with percentage thickness reduction. The ballooning effect observed during the hydrostatic burst test is another added advantage in piping failure detection. This is attributed to the particular way of flow-forming the pipes using twin motor-driven rollers, whereby the pipe material is rendered anisotropic in a specific manner. With a better understanding of the process on polymeric material, flow-forming may now be applied to the plastics industry in the near future to produce super-tough polymer pipes. © 1997 Elsevier Science S.A.
Source Title: Journal of Materials Processing Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/58298
ISSN: 09240136
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

34
checked on Dec 15, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.