Steady-state scratch testing of polymers
File(s)
Accepted version
Author(s)
Blackman, BRK
Hoult, T
Patel, Y
Steininger, H
Williams, JG
Type
Journal Article
Abstract
The paper extends the notion of steady-state cutting of polymers with a sharp tool to scratching. The analysis assumes there is separation at the tool tip (fracture) and the removed layer undergoes plastic shear. Results are presented for three polymers: PMMA, PC and PBT. For the tougher polymer, PC, smooth scratches were obtained and the modified cutting analysis works well provided that the wear on the initially sharp tip is accounted for. For the more brittle polymers, PMMA and PBT, rougher scratches were obtained and this is consistent with the notion that the polymers exhibited micro-cracking ahead of the tool tip, which led to rough surfaces being generated. The results demonstrate that the fracture toughness and the yield stress are controlling parameters in the scratching process and that a sufficiently high value of crack opening displacement COD (greater than about 10 μm) ensures that smooth scratches are obtained, as was the case for PC.
Date Issued
2015-11-09
Date Acceptance
2015-11-01
Citation
Polymer Testing, 2015, 49, pp.38-45
ISSN
0142-9418
Publisher
Elsevier
Start Page
38
End Page
45
Journal / Book Title
Polymer Testing
Volume
49
Copyright Statement
© 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
BASF Aktiengesellschaft
Grant Number
Non given
Subjects
Polymers
0303 Macromolecular And Materials Chemistry
0912 Materials Engineering
0913 Mechanical Engineering
Notes
publisher: Elsevier articletitle: Steady-state scratch testing of polymers journaltitle: Polymer Testing articlelink: http://dx.doi.org/10.1016/j.polymertesting.2015.11.002 content_type: article copyright: Copyright © 2015 Elsevier Ltd. All rights reserved.
Publication Status
Published