Study of microstructure and fracture properties of blunt notched and sharp cracked high density polyethylene specimens

Study of microstructure and fracture properties of blunt notched and sharp cracked high density polyethylene specimens

Abstract This paper examines the effect of a broad range of crosshead speed (0.05 to 100 mm/min) and a small range of temperature (25 °C and 45 °C) on the failure behaviour of high density polyethylene (HDPE) specimens containing a) standard size blunt notch and b) standard size blunt notch plus sma...

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Autores principales: Huanyu Pan, Sheila Devasahayam, Sri Bandyopadhyay
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2017
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Acceso en línea:https://doaj.org/article/59f5cd5f78374ad5a443b002a370c8c7
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spelling oai:doaj.org-article:59f5cd5f78374ad5a443b002a370c8c72021-12-02T16:07:01ZStudy of microstructure and fracture properties of blunt notched and sharp cracked high density polyethylene specimens10.1038/s41598-017-03884-62045-2322https://doaj.org/article/59f5cd5f78374ad5a443b002a370c8c72017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03884-6https://doaj.org/toc/2045-2322Abstract This paper examines the effect of a broad range of crosshead speed (0.05 to 100 mm/min) and a small range of temperature (25 °C and 45 °C) on the failure behaviour of high density polyethylene (HDPE) specimens containing a) standard size blunt notch and b) standard size blunt notch plus small sharp crack – all tested in air. It was observed that the yield stress properties showed linear increase with the natural logarithm of strain rate. The stress intensity factors under blunt notch and sharp crack conditions also increased linearly with natural logarithm of the crosshead speed. The results indicate that in the practical temperature range of 25 °C and 45 °C under normal atmosphere and increasing strain rates, HDPE specimens with both blunt notches and sharp cracks possess superior fracture properties. SEM microstructure studies of fracture surfaces showed craze initiation mechanisms at lower strain rate, whilst at higher strain rates there is evidence of dimple patterns absorbing the strain energy and creating plastic deformation. The stress intensity factor and the yield strength were higher at 25 °C compared to those at 45 °CHuanyu PanSheila DevasahayamSri BandyopadhyayNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-13 (2017)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Huanyu Pan
Sheila Devasahayam
Sri Bandyopadhyay
Study of microstructure and fracture properties of blunt notched and sharp cracked high density polyethylene specimens
description Abstract This paper examines the effect of a broad range of crosshead speed (0.05 to 100 mm/min) and a small range of temperature (25 °C and 45 °C) on the failure behaviour of high density polyethylene (HDPE) specimens containing a) standard size blunt notch and b) standard size blunt notch plus small sharp crack – all tested in air. It was observed that the yield stress properties showed linear increase with the natural logarithm of strain rate. The stress intensity factors under blunt notch and sharp crack conditions also increased linearly with natural logarithm of the crosshead speed. The results indicate that in the practical temperature range of 25 °C and 45 °C under normal atmosphere and increasing strain rates, HDPE specimens with both blunt notches and sharp cracks possess superior fracture properties. SEM microstructure studies of fracture surfaces showed craze initiation mechanisms at lower strain rate, whilst at higher strain rates there is evidence of dimple patterns absorbing the strain energy and creating plastic deformation. The stress intensity factor and the yield strength were higher at 25 °C compared to those at 45 °C
format article
author Huanyu Pan
Sheila Devasahayam
Sri Bandyopadhyay
author_facet Huanyu Pan
Sheila Devasahayam
Sri Bandyopadhyay
author_sort Huanyu Pan
title Study of microstructure and fracture properties of blunt notched and sharp cracked high density polyethylene specimens
title_short Study of microstructure and fracture properties of blunt notched and sharp cracked high density polyethylene specimens
title_full Study of microstructure and fracture properties of blunt notched and sharp cracked high density polyethylene specimens
title_fullStr Study of microstructure and fracture properties of blunt notched and sharp cracked high density polyethylene specimens
title_full_unstemmed Study of microstructure and fracture properties of blunt notched and sharp cracked high density polyethylene specimens
title_sort study of microstructure and fracture properties of blunt notched and sharp cracked high density polyethylene specimens
publisher Nature Portfolio
publishDate 2017
url https://doaj.org/article/59f5cd5f78374ad5a443b002a370c8c7
work_keys_str_mv AT huanyupan studyofmicrostructureandfracturepropertiesofbluntnotchedandsharpcrackedhighdensitypolyethylenespecimens
AT sheiladevasahayam studyofmicrostructureandfracturepropertiesofbluntnotchedandsharpcrackedhighdensitypolyethylenespecimens
AT sribandyopadhyay studyofmicrostructureandfracturepropertiesofbluntnotchedandsharpcrackedhighdensitypolyethylenespecimens
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