Strain-induced crystallization of natural rubber with high strain rates

2012 ◽  
Vol 50 (23) ◽  
pp. 1630-1637 ◽  
Author(s):  
Baijin Zhao ◽  
Nan Tian ◽  
Yanpin Liu ◽  
Tingzi Yan ◽  
Weiqing Zhou ◽  
...  
Keyword(s):  
Natural Rubber ◽  
High Strain ◽  
Strain Rates ◽  
High Strain Rates ◽  
Strain Induced Crystallization ◽  
Induced Crystallization

A comparison of the abilities of natural rubber (NR) and synthetic polyisoprene cis-1,4 rubber (IR) to crystallize under strain at high strain rates

2016 ◽  
Vol 18 (5) ◽  
pp. 3472-3481 ◽  
Author(s):  
Nicolas Candau ◽  
Laurent Chazeau ◽  
Jean-Marc Chenal ◽  
Catherine Gauthier ◽  
Etienne Munch
Keyword(s):  
Comparative Study ◽  
Natural Rubber ◽  
High Strain ◽  
Strain Rates ◽  
High Strain Rates ◽  
Synthetic Rubber ◽  
Strain Induced Crystallization ◽  
First Time ◽  
Induced Crystallization

In situ WAXS experiments combined with a thermodynamic approach allowed for the first time a comparative study of strain induced crystallization of natural and synthetic rubber at high strain rates.

scholarly journals Fatigue effect of elastocaloric properties in natural rubber

2016 ◽  
Vol 374 (2074) ◽  
pp. 20150302 ◽  
Author(s):  
Gael Sebald ◽  
Zhongjian Xie ◽  
Daniel Guyomar
Keyword(s):  
Natural Rubber ◽  
High Strain ◽  
Crack Growth Resistance ◽  
Engineering Strain ◽  
Temperature Changes ◽  
Fatigue Effect ◽  
Stress Coefficient ◽  
Strain Induced Crystallization ◽  
Degradation Of Properties ◽  
Induced Crystallization

In the framework of elastocaloric (eC) refrigeration, the fatigue effect on the eC effect of natural rubber (NR) is investigated. Repetitive deformation cycles at engineering strain regime from 1 to 6 results in a rapid rupture (approx. 800 cycles). Degradation of properties and fatigue life are then investigated at three different strain regimes with the same strain amplitude: before onset strain of strain-induced crystallization (SIC) (strain regime of 0–3), onset strain of melting (strain regime of 2–5) and high strain of SIC (strain regime of 4–7). Strain of 0–3 leads to a low eC effect and cracking after 2000 cycles. Strain of 2–5 and 4–7 results in an excellent crack growth resistance and much higher eC effect with adiabatic temperature changes of 3.5 K and 4.2 K, respectively, thanks to the effect of SIC. The eC stress coefficient index γ (ratio between eC temperature change and applied stress) for strains of 2–5 and 4–7 are γ 2–5 =4.4 K MPa −1 and γ 4–7 =1.6 K MPa −1 , respectively, demonstrating the advantage of the strain regime 2–5. Finally, a high-cycle test up to 1.7×10 5 cycles is successfully applied to the NR sample with very little degradation of eC properties, constituting an important step towards cooling applications. This article is part of the themed issue ‘Taking the temperature of phase transitions in cool materials’.

Ductility of aluminium alloy AA7075 at high strain rates

2000 ◽  
Vol 10 (PR9) ◽  
pp. Pr9-335-Pr9-340 ◽  
Author(s):  
E. El-Magd ◽  
M. Brodmann
Keyword(s):  
Aluminium Alloy ◽  
High Strain ◽  
Strain Rates ◽  
High Strain Rates

Anisotropic ductile failure in titanium alloy at quasi-static and high strain rates

2003 ◽  
Vol 110 ◽  
pp. 571-576 ◽  
Author(s):  
A. A. Mir ◽  
D. C. Barton ◽  
T. D. Andrews ◽  
P. Church
Keyword(s):  
Titanium Alloy ◽  
High Strain ◽  
Ductile Failure ◽  
Strain Rates ◽  
High Strain Rates
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