PMID- 28733586
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20190117
LR  - 20190117
IS  - 2045-2322 (Electronic)
IS  - 2045-2322 (Linking)
VI  - 7
IP  - 1
DP  - 2017 Jul 21
TI  - Study of microstructure and fracture properties of blunt notched and sharp 
      cracked high density polyethylene specimens.
PG  - 6096
LID - 10.1038/s41598-017-03884-6 [doi]
LID - 6096
AB  - 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  degrees C and 45  degrees 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  degrees C and 45  degrees 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  degrees C compared to those at 45  degrees C.
FAU - Pan, Huanyu
AU  - Pan H
AD  - School of Materials Science & Engineering, University of New South Wales, Sydney, 
      Australia.
FAU - Devasahayam, Sheila
AU  - Devasahayam S
AD  - Department of Environmental Sciences, Macquarie University, Sydney, Australia. 
      sheila.devasahayam@mq.edu.au.
FAU - Bandyopadhyay, Sri
AU  - Bandyopadhyay S
AD  - School of Materials Science & Engineering, University of New South Wales, Sydney, 
      Australia.
LA  - eng
PT  - Journal Article
DEP - 20170721
PL  - England
TA  - Sci Rep
JT  - Scientific reports
JID - 101563288
PMC - PMC5522440
COIS- The authors declare that they have no competing interests.
EDAT- 2017/07/25 06:00
MHDA- 2017/07/25 06:01
PMCR- 2017/07/21
CRDT- 2017/07/23 06:00
PHST- 2016/08/04 00:00 [received]
PHST- 2017/04/18 00:00 [accepted]
PHST- 2017/07/23 06:00 [entrez]
PHST- 2017/07/25 06:00 [pubmed]
PHST- 2017/07/25 06:01 [medline]
PHST- 2017/07/21 00:00 [pmc-release]
AID - 10.1038/s41598-017-03884-6 [pii]
AID - 3884 [pii]
AID - 10.1038/s41598-017-03884-6 [doi]
PST - epublish
SO  - Sci Rep. 2017 Jul 21;7(1):6096. doi: 10.1038/s41598-017-03884-6.