Biaxial deformation behaviour of poly-ether-ether-ketone

2018 ◽  
Author(s):  
Josh Turner ◽  
Gary Menary ◽  
Peter Martin
Keyword(s):  
Deformation Behaviour ◽  
Biaxial Deformation ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone

scholarly journals Modelling the Temperature Dependent Biaxial Response of Poly(ether-ether-ketone) Above and Below the Glass Transition for Thermoforming Applications

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1042
Author(s):  
Josh A. Turner ◽  
Gary H. Menary ◽  
Peter J. Martin ◽  
Shiyong Yan
Keyword(s):  
Glass Transition ◽  
Deformation Behaviour ◽  
Material Model ◽  
Average Error ◽  
Modern Material ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Principal Directions ◽  
Forming Simulations ◽  
Ether Ketone

Desire to accurately predict the deformation behaviour throughout industrial forming processes, such as thermoforming and stretch blow moulding, has led to the development of mathematical models of material behaviour, with the ultimate aim of embedding into forming simulations enabling process and product optimization. Through the use of modern material characterisation techniques, biaxial data obtained at conditions comparable to the thermoforming process was used to calibrate the Buckley material model to the observed non-linear viscoelastic stress/strain behaviour. The material model was modified to account for the inherent anisotropy observed between the principal directions through the inclusion of a Holazapfel–Gasser–Ogden hyperelastic element. Variations in the post-yield drop in stress values associated with deformation rate and specimen temperature below the glass transition were observable, and facilitated in the modified model through time-temperature superposition creating a linear relationship capable of accurately modelling this change in yield stress behaviour. The modelling of the region of observed flow stress noted when above the glass transition temperature was also facilitated through adoption of the same principal. Comparison of the material model prediction was in excellent agreement with experiments at strain rates and temperatures of 1–16 s−1 and 130–155 °C respectively, for equal-biaxial mode of deformation. Temperature dependency of the material model was well replicated with across the broad temperature range in principal directions, at the reference strain rate of 1 s−1. When concerning larger rates of deformation, minimum and maximum average error levels of 6.20% and 10.77% were noted. The formulation, and appropriate characterization, of the modified Buckley material model allows for a stable basis in which future implementation into representative forming simulations of poly-aryl-ether-ketones, poly(ether-ether-ketone) (PEEK) and many other post-yield anisotropic polymers.

Preparation of a novel poly (ether ether ketone) self-reinforced paper appropriate for harsh conditions

2021 ◽  
Vol 56 (18) ◽  
pp. 11174-11185
Author(s):  
Xin Cong ◽  
Jiannan Ren ◽  
Chunhui Xiang ◽  
Xuzhao Gai ◽  
Guibin Wang ◽  
...  
Keyword(s):  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Harsh Conditions
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