Long-term creep behaviour of E-glass/epoxy composite: time-temperature superposition principle

2020 ◽  
Vol 49 (6) ◽  
pp. 254-262
Author(s):  
Nadia Nosrati ◽  
Ahad Zabett ◽  
Samaneh Sahebian
Keyword(s):  
Epoxy Composite ◽  
Creep Behaviour ◽  
Superposition Principle ◽  
Temperature Superposition ◽  
Time Temperature Superposition ◽  
Time Temperature Superposition Principle ◽  
Term Creep

Viscoelastic properties of kenaf reinforced unsaturated polyester composites

2014 ◽  
Vol 03 (01) ◽  
pp. 1450004 ◽  
Author(s):  
Ekhlas A. Osman ◽  
Saad A. Mutasher
Keyword(s):  
Unsaturated Polyester ◽  
Superposition Principle ◽  
Creep Data ◽  
Kenaf Fiber ◽  
Temperature Superposition ◽  
Polyester Composites ◽  
Time Temperature Superposition Principle ◽  
Term Creep ◽  
Strain Model

In order to quantify the effect of temperature on the mechanical and dynamic properties of kenaf fiber unsaturated polyester composites, formulations containing 10 wt.% to 40 wt.% kenaf fiber were produced and tested at two representative temperatures of 30°C and 50°C. Dynamic mechanical analysis was performed, to obtain the strain and creep compliance for kenaf composites at various styrene concentrations. It is possible to obtain creep curves at different temperature levels which can be shifted along the time axis to generate a single curve known as a master curve. This technique is known as the time–temperature superposition principle. Shift factors conformed to a William–Landel–Ferry (WLF) equation. However, more long term creep data was needed in order to further validate the applicability of time-temperature superposition principle (TTSP) to this material. The primary creep strain model was fitted to 60 min creep data. The resulting equation was then extrapolated to 5.5 days; the creep strain model of power-law was successfully used to predict the long-term creep behavior of natural fiber/thermoset composites.

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