Investigation of sub-melt temperature bonding of carbon-fibre/PEEK in an automated laser tape placement process

Stokes-Griffin, Christopher; Compston, Paul

doi:10.1016/j.compositesa.2015.12.019

Cited by 83 publications

(80 citation statements)

References 19 publications

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“…High temperature resistance and impact toughness are the two most important technical requirements for practical applications of CFRTP, especially in the area of aerospace . Carbon fiber reinforced PEEK (CF/PEEK) composites are excellent candidates for manufacturing the components , which can be prepared by many ways, for example, powder impregnation , commingled yarns , or prepregs . In these methods, powder impregnation process is undoubtedly an economical and convenient way to manufacture the thermoplastic composites .…”

Section: Introductionmentioning

confidence: 99%

A comprehensive study on controlling the porosity of CCF300/PEEK composites by optimizing the impregnation parameters

Wang

Dong

et al. 2017

Polymer Composites

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In order to manufacture excellent CCF300/PEEK composites, a comprehensive study on controlling porosity of CCF300/PEEK composites was investigated by optimizing the impregnation parameters. Four kinds of PEEK with different melting flow rates (MFR) were employed to study on their rheology behavior and reveal the processing characteristics. The results showed that the viscous flow of PEEK has a higher dependence on the processing pressure than temperature. Furthermore, PEEK rheology behavior was employed to assist the optimization of impregnation parameters. PEEK powders were coated on both sides of single layer CCF300 by a preheating process, and then the semi‐impregnated forms were stacked layer by layer to manufacture CCF300/PEEK composites. An optimized impregnation prediction model was established and verified, showing a pretty effective prediction about pressure and holding time at a certain temperature to control the porosity and achieve the full impregnation. Afterwards, the well‐impregnated CCF300/PEEK composites were evaluated by their compressive performance, flexural performance and interlaminar shear performance, showing good interfacial and interlaminar bonding to resist the propagation of cracks. POLYM. COMPOS., 39:3765–3779, 2018. © 2017 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

A comprehensive study on controlling the porosity of CCF300/PEEK composites by optimizing the impregnation parameters

Wang

Dong

et al. 2017

Polymer Composites

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“…The laser ATP process has a highly dynamic temperature and pressure history, and therefore it is imperative that models which apply to non-isothermal conditions are considered. In this paper, the bonding model parameters and implementation are adapted from the authors' previous study (MP-4 in [43]) where the model predictions were found to agree well with experimental lap shear strengths for a placement rate of 333 mm/s.…”

Section: Bonding Model Implementationmentioning

confidence: 80%

“…The degree of autohesion D ah is calculated for the interval of ½t; t b , where t is the time of formation of a new increment of intimate contact. A previous study by the authors' [43] demonstrated that bonding can occur below the melting point in placement of PEEK-based composites at rates >100 mm/s as the polymer remains in a highly amorphous state while in the consolidation zone, with the precondition the infinite melting point is exceeded in the heating zone. In that study, bonding model predictions were found to be in best agreement with experimental lap shear strengths when assuming a bonding model temperature threshold of the glass transition (143°C); this was also assumed for this study as the same composite was utilised for the experimental placement trials.…”

Section: Coupled Bonding Modelmentioning

confidence: 98%

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An inverse model for optimisation of laser heat flux distributions in an automated laser tape placement process for carbon-fibre/PEEK

Stokes-Griffin

Compston

2016

Composites Part A: Applied Science and Manufacturing

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a b s t r a c tHigh power diode lasers have enabled higher placement rates to be achieved in automated tape placement (ATP) of thermoplastic-based composite materials. Laser ATP heads in published literature employ homogeneous linear or rectangular laser spots, however a variety of solutions are available to produce customised irradiance profiles. No efforts to date have investigated what a more ideal heat flux profile would be for laser ATP in terms of length and distribution. This paper describes a method to determine the required laser heat flux profiles to achieve desired heating zone temperature profiles by means of an inverse thermal model. A bonding model was implemented to assess the performance of various heating zone temperature profiles for placement at 400 mm/s. Short beam strengths from experimental trials were used to validate the bonding model. A two-stepped heating profile was found to provide a good balance of increased strength with a small increase in power requirement.

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“…Poly (ether ether ketone) is a kind of high-performance semicrystalline thermoplastics which possesses high thermal stability and excellent mechanical properties, [1][2][3][4] and has been extensively used in automotive, electronics, and aeronautic. [5][6][7][8] Recently, as one of the effective methods, more and more researchers intend to improve the properties of nanocomposites by adding nanoscale particles into polymers. [9] Graphene (GE) is consisted of sp 2 carbon atoms which arranged in a honeycomb structure.…”

Section: Introductionmentioning

confidence: 99%

Non‐isothermal crystallization kinetic behavior of graphene reinforced poly(ether ether ketone) nanocomposites

Xiao

et al. 2019

Polymer Crystallization

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The research on non‐isothermal crystallization kinetics of Poly (ether ether ketone) (PEEK) nanocomposites with addition of graphene was executed by differential scanning calorimetry (DSC). All samples were cooled from 390°C to 30°C with different cooling rates (from 5 to 25°C/min). The modified Avrami, Ozawa and combined Avrami‐Ozawa methods were served for fitting the data, in order to research the non‐isothermal crystallization kinetics of PEEK composites contained different amount of graphene. It was found that the absolute crystallinity of graphene/PEEK composites decreased with the graphene content increasing, indicating the restricted effect of the graphene on the mobility of PEEK molecular chains. Thus it imparted the resulting nanocomposites to form the smaller and more defective spherulites, by comparision with the pristine PEEK which formed by the homogeneous crystallization. Moreover, The Avrami‐Ozawa equation was proved to be the reasonable model to depict the crystallization behavior of the graphene/PEEK nanocomposites under non‐isothermal condition.

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Investigation of sub-melt temperature bonding of carbon-fibre/PEEK in an automated laser tape placement process

Cited by 83 publications

References 19 publications

A comprehensive study on controlling the porosity of CCF300/PEEK composites by optimizing the impregnation parameters

A comprehensive study on controlling the porosity of CCF300/PEEK composites by optimizing the impregnation parameters

An inverse model for optimisation of laser heat flux distributions in an automated laser tape placement process for carbon-fibre/PEEK

Non‐isothermal crystallization kinetic behavior of graphene reinforced poly(ether ether ketone) nanocomposites

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