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A novel essential work of fracture experimental methodology for highly dissipative materials

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Title: A novel essential work of fracture experimental methodology for highly dissipative materials
Authors: Skamniotis, C
Kamaludin, MA
Elliott, M
Charalambides, M
Item Type: Journal Article
Abstract: Determining fracture toughness for soft, highly dissipative, solids has been a challenge for several decades. Amongst the limited experimental options for such materials is the essential work of fracture (EWF) method. However, EWF data are known to be strongly influenced by specimen size and test speed. In contrast to time-consuming imaging techniques that have been suggested to address such issues, a simple and reproducible method is proposed. The method accounts for diffuse dissipation in the specimen while ensuring consistent strain rates by scaling both the sample size and testing speed with ligament length. We compare this new method to current practice for two polymers: a starch based food and a polyethylene (PE) tape. Our new method gives a size independent and more conservative fracture toughness. It provides key-data, essential in numerical models of the evolution of structure breakdown in soft solids as seen for example during oral processing of foods.
Issue Date: 19-May-2017
Date of Acceptance: 20-Mar-2017
URI: http://hdl.handle.net/10044/1/45740
DOI: 10.1016/j.polymer.2017.03.057
ISSN: 0032-3861
Publisher: Elsevier
Start Page: 167
End Page: 182
Journal / Book Title: Polymer
Volume: 117
Issue: 1
Copyright Statement: © 2017 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor/Funder: Mars Care and Treats
Funder's Grant Number: 2003625024
Keywords: Science & Technology
Physical Sciences
Polymer Science
EWF
Polymer
Strain rate
Remote dissipation
Crack speed
Crack tip blunting
PRESSURE-SENSITIVE ADHESIVES
STRESS DUCTILE FRACTURE
STRAIN ESSENTIAL WORK
NONESSENTIAL WORK
EWF METHOD
TOUGHNESS
FILMS
POLYMERS
THERMOPLASTICS
PARAMETERS
03 Chemical Sciences
09 Engineering
Polymers
Publication Status: Published
Online Publication Date: 2017-03-23
Appears in Collections:Mechanical Engineering
Faculty of Engineering