scholarly journals Time-Temperature Superposition of Time-Dependent Birefringence for High Density Polyethylene

1970 ◽  
Vol 19 (199) ◽  
pp. 350-356
Author(s):  
Yoshiharu FUKUI ◽  
Masahiro USHIROKAWA ◽  
Tadahiro ASADA ◽  
Shigeharu ONOGI ◽  
Takami SATO
Keyword(s):  
High Density Polyethylene ◽  
High Density ◽  
Time Dependent ◽  
Temperature Superposition ◽  
Time Temperature Superposition

scholarly journals Time‐dependent properties of graphene nanoplatelets reinforced high‐density polyethylene

2021 ◽  
pp. 50783
Author(s):  
Zainab Al‐Maqdasi ◽  
Liva Pupure ◽  
Guan Gong ◽  
Nazanin Emami ◽  
Roberts Joffe
Keyword(s):  
High Density Polyethylene ◽  
Graphene Nanoplatelets ◽  
High Density ◽  
Time Dependent

Time and temperature effects on geomembrane strain from a gravel particle subjected to sustained vertical force

2012 ◽  
Vol 49 (3) ◽  
pp. 249-263 ◽  
Author(s):  
A. Sabir ◽  
R.W.I. Brachman
Keyword(s):  
Experimental Data ◽  
Temperature Effects ◽  
High Density Polyethylene ◽  
Measured Data ◽  
Vertical Force ◽  
Temperature Superposition ◽  
Measured Strain ◽  
Time Temperature Superposition ◽  
Tensile Strains

Experimental data is reported that quantifies how time (up to 10 000 h) and temperature (from 22 to 85 °C) impact tensile strains in a 1.5 mm thick high-density polyethylene geomembrane — with a compressible clay liner beneath it — that are induced by an overlying gravel particle when subjected to a sustained vertical force. At an average applied stress of 250 kPa and clay water content of 16%, tensile strains were found to increase by 1.25 times as the temperature was increased from 22 to 55 °C after 1000 h. Similarly, strains were found to increase by factors between 1.2 to 1.3 as time was increased from 10 to 1000 h. Based on the measured data, time–temperature superposition (tTS) was then used to develop an approach to predict long-term geomembrane strains from gravel indentations. The tTS approach was validated against independent experiments conducted for 10 000 h (1.14 years) as it was found that the predicted strain of 19% was very close to the measured strain of 18%. Provided that the physical properties of the geomembrane do not decrease abruptly, the results suggest that the tTS approach developed can be used to provide estimates of long-term geomembrane strains.

Temperature Influence on Microindentation Data of a Viscoelastic Material

2013 ◽  
Vol 586 ◽  
pp. 206-209
Author(s):  
Jiří Minster ◽  
Vlastimil Králík ◽  
Jiří Němeček
Keyword(s):  
Mechanical Properties ◽  
Master Curve ◽  
Time Dependent ◽  
Berkovich Indenter ◽  
Temperature Influence ◽  
Short Term ◽  
Temperature Superposition ◽  
Different Temperatures ◽  
Creep Measurements ◽  
Time Temperature Superposition

This paper aims to apply time-temperature superposition to short-term microindentation data measured at different temperatures, and to compare the viscoelastic compliance master curve that is found with data derived earlier from standard macro creep measurements in pressure. Using a sharp standard Berkovich indenter a successful application of this geometry in characterizing time-dependent mechanical properties of viscoelastic materials is confirmed.

Nonlinear creep in high-density polyethylene under time-dependent stresses

1975 ◽  
Vol 9 (5) ◽  
pp. 704-709
Author(s):  
A. F. Kregers ◽  
U. K. Vilks ◽  
M. Ya. Leitane
Keyword(s):  
High Density Polyethylene ◽  
High Density ◽  
Time Dependent ◽  
Nonlinear Creep
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