Thermo-Mechanical Behavior of Poly(ether ether ketone): Experiments and Modeling

Drozdov, Aleksey D.; Christiansen, Jesper de Claville

doi:10.3390/polym13111779

Cited by 6 publications

(3 citation statements)

References 65 publications

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“…The PEKK matrix can be modelled as an isotropic and elastoplastic material [27,28] and its constitutive model is highly dependent on temperature. PEKK is expected to transit from glassy to rubbery state as the temperature approaches its Tg, and this will result in a dramatic change of its elastic modulus and strength.…”

Section: Pekk Matrixmentioning

confidence: 99%

“…Given the mechanical properties of the thermoplastic matrix / fibre-matrix interface can deteriorate drastically as the temperature approaches / exceeds the glass transition temperature (Tg) of the matrix [27,28], we hypothesize that the machining induced high temperatures would have a strong impact on the cutting physics of CFRTP. Despite its significance, this research area remains understudied.…”

Section: Introductionmentioning

confidence: 99%

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Temperature-dependent cutting physics in orthogonal cutting of carbon fibre reinforced thermoplastic (CFRTP) composite

Ge,

Tan,

Ahmad

et al. 2023

Preprint

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The global commitment towards reducing carbon emissions drives the implementation of sustainable carbon-fibre-reinforced-thermoplastic composites (CFRTPs). However, the machining of CFRTPs presents challenges due to the material’s ductile-brittle composition and sensitivity to machining-induced high temperatures. For the first time, we conducted temperature-controlled orthogonal cutting of CFRTP (using CF/PEKK as a demonstrator) to unveil its temperature-dependent cutting physics. Three representative cutting temperatures, 23 ℃ (ambient temperature),100 ℃ (< PEKK’s glass transition temperature (Tg)) and 200 ℃ (> Tg) and four typical fibre cutting orientations (0°, 45°, 90°, and 135°) have been investigated. The evolution of chip microstructural morphology and surface/subsurface damage have been analysed by advanced microscopy to reveal temperature-dependent material removal mechanisms. The experimental results were elucidated through a novel microscale finite-element-analysis (FEA) model considering thermal softening of the matrix and interface. Results show the transition of the cutting physics with increasing temperature is associated to the degradation of the thermoplastic matrix stiffness/ultimate strength and interface bonding strength and fracture toughness, especially when > Tg.

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Section: Pekk Matrixmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Temperature-dependent cutting physics in orthogonal cutting of carbon fibre reinforced thermoplastic (CFRTP) composite

Ge,

Tan,

Ahmad

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…With a view to improving experimental setups for polymer processing techniques, Drozdov et al [8] developed constitutive equations for the thermo-mechanical behavior of poly(ether ether ketone) under uniaxial deformation based on experimental observations made for uniaxial tensile tests, relaxation tests, and creep tests at various stresses in a wide temperature range. The activation energies for the elastoplastic, viscoelastic, and viscoelastoplastic responses adopt similar values at temperatures above the glass transition point.…”

mentioning

confidence: 99%