FATIGUE-CRACK PROPAGATION BEHAVIOR OF GAMMA-IRRADIATED LDPE FILMS

Authors
BENSON RS PARDO MEM
Citation
Rs. Benson et Mem. Pardo, FATIGUE-CRACK PROPAGATION BEHAVIOR OF GAMMA-IRRADIATED LDPE FILMS, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 141(1-4), 1998, pp. 202-205
Citations number
15
Categorie Soggetti
Instument & Instrumentation","Nuclear Sciences & Tecnology","Physics, Atomic, Molecular & Chemical","Physics, Nuclear
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
141
Issue
1-4
Year of publication
1998
Pages
202 - 205
Database
ISI
SICI code
0168-583X(1998)141:1-4<202:FPBOGL>2.0.ZU;2-Y
Abstract
In the present study, thin films of low density polyethylene (LDPE) we re subjected to gamma radiation of 50 and 250 kGy. The tensile propert ies, fatigue life, and fatigue crack propagation (FCP) rate of the irr adiated samples were compared with unexposed LDPE. The irradiated samp les showed a decrease in fatigue life which was dose dependent. The fa tigue life of LDPE-0, LDPE-50 and LDPE-250 was determined to be 4058, 250, and 58 cycles, respectively. The FCP rate was found to increase w ith dose. The changes in fatigue behavior was directly attributed to t he crosslinking of molecular chains upon exposure to gamma radiation. (C) 1998 Elsevier Science B.V. All rights reserved.