Next Article in Journal
Model for the Correlation between Anodic Dissolution Resistance and Crystallographic Texture in Pipeline Steels
Previous Article in Journal
Osteogenic Potential of Graphene in Bone Tissue Engineering Scaffolds
Open AccessArticle

Understanding the Thickness Effect on the Tensile Strength Property of Dyneema®HB26 Laminates

1
Department of Aeronautics, Imperial College London, London SW7 2AZ, UK
2
Defence Science and Technology Laboratory, Porton Down, Salisbury SP4 0JQ, UK
*
Author to whom correspondence should be addressed.
Materials 2018, 11(8), 1431; https://doi.org/10.3390/ma11081431
Received: 16 July 2018 / Revised: 6 August 2018 / Accepted: 8 August 2018 / Published: 14 August 2018
(This article belongs to the Section Advanced Composites)
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. View Full-Text
Keywords: finite element (FE); mechanical tests; ultra-high molecular weight polyethylene finite element (FE); mechanical tests; ultra-high molecular weight polyethylene
Show Figures

Figure 1

MDPI and ACS Style

Iannucci, L.; Del Rosso, S.; Curtis, P.T.; Pope, D.J.; Duke, P.W. Understanding the Thickness Effect on the Tensile Strength Property of Dyneema®HB26 Laminates. Materials 2018, 11, 1431.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop