Environmental effects in biaxially orientated Polymethyl Methacrylate
File(s)
Published version
Author(s)
Ng, Sze Ki
Kamaludin, Muhammad A
Dear, John P
Blackman, Bamber R
Type
Journal Article
Abstract
Environmental stress cracking (ESC) is commonly found in polymers when submerged in an environment under applied stress. In such conditions, a crack may initiate and propagate from a material defect until it reaches a critical size and causes catastrophic failure. It is known that materials with a denser molecular structure are less prone to ESC, hence amorphous polymers often suffer greatly from this effect. A fracture mechanics approach was employed to investigate the fracture mechanism and crack growth in both air and environment. Two different grades of PMMA (amorphous and biaxially stretched PMMA) were tested in solvents with similar solubility parameters as this is known to hasten crazing. Time for crack initiation and crack speed were obtained and plotted against their corresponding fracture toughness. Thus, the ESC resistance of each material can be compared and component life expectance can also be predicted. To validate the experimental results, scanning electron microscopy (SEM) was used to examine the fracture mechanism of ESC.
Editor(s)
Sedmak, A
Radakovic, Z
Rakin, M
Date Issued
2018-12-31
Date Acceptance
2018-12-01
Citation
Procedia Structural Integrity, 2018, 13, pp.304-310
ISSN
2452-3216
Publisher
Elsevier B.V.
Start Page
304
End Page
310
Journal / Book Title
Procedia Structural Integrity
Volume
13
Copyright Statement
© 2018 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Sponsor
Beijing Institute of Aeronautical Materials (BIAM)
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000459860900050&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
N/A
Subjects
Science & Technology
Technology
Engineering, Mechanical
Materials Science, Multidisciplinary
Engineering
Materials Science
environmental stress cracking
biaxially orientated PMMA
fracture mechanics
crazing
CRACK
GROWTH
Publication Status
Published
Coverage Spatial
Belgrade, SERBIA
Date Publish Online
2018-12-31