Understanding the thickness effect on the tensile strength property of Dyneema®HB26 laminates
File(s)
Accepted version
Author(s)
Iannucci, Lorenzo
Del Rosso, S
Curtis, Paul
Pope, Dan
Duke, Phillip
Type
Journal Article
Abstract
In this study, an experimental and numerical investigation is presented on the effect of thickness and test rate within the pseudo static regime on the tensile properties of Dyneema®HB26 laminates. A detailed experimental presentation on the tensile testing of different thickness is presented and highlights the commonly seen observation that the tensile strength of a laminate reduces as a function of the specimen thickness. To understand these experimental observations, a constitutive material model of the individual macro fibril is developed and applied to modelling the fibre and upscaling to the laminate. The modelling strategy is implemented into ls-dyna and used to perform a parameter study on the specimen geometries used in the experimental study. The model assumes that the fibril strength is a function of the amorphous volume within the fibre and hence fibril. It can be observed that the experimental behaviour can be simulated by modelling the interface between laminate plies and the fibril, and hence fibre failure. The weak interfaces from the fibril to the laminate scale make the testing of fibres and laminates very difficult. Hence, it is proposed that the intrinsic fibril strength should be used as a measure of strength, and the fundamental strength is determined through numerical studies.
Date Issued
2018-08-14
Date Acceptance
2018-08-08
Citation
Materials, 2018, 11 (8), pp.1-18
ISSN
1996-1944
Publisher
MDPI AG
Start Page
1
End Page
18
Journal / Book Title
Materials
Volume
11
Issue
8
Copyright Statement
© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0 - https://creativecommons.org/licenses/by/4.0/).
Identifier
https://www.mdpi.com/1996-1944/11/8/1431
Subjects
Science & Technology
Technology
Materials Science, Multidisciplinary
Materials Science
finite element (FE)
mechanical tests
ultra-high molecular weight polyethylene
MOLECULAR-WEIGHT POLYETHYLENE
COMPOSITES
MECHANISMS
FIBERS
IMPACT
finite element (FE)
mechanical tests
ultra-high molecular weight polyethylene
03 Chemical Sciences
09 Engineering
Publication Status
Published
Article Number
1431
Date Publish Online
2018-08-14