Tensile Mechanical Properties of Functional Gradient Hydroxyapatite/Polyether-ether-ketone Biocomposites

The extreme heating environment during re-entry requires an efficient heat shield to protect a spacecraft. The current method of manufacturing a heat shield is labor intensive. The application of 3D printing can reduce cost and manufacturing time and improve the quality of a heat shield. A 3D printed carbon fiber/polyether ether ketone (CF/PEEK) composite was proposed as a heat shield material. The aim was to develop a heat shield and the structural member as a single structure while maintaining the necessary recession resistance. Test samples were exposed to thermal cycles and ultraviolet (UV) radiation environment. Subsequently, a tensile test was performed to evaluate the effect of thermal cycle and UV radiation on the mechanical properties. The sample’s recession performance and temperature behavior were evaluated using an arc heated wind tunnel. Exposure to thermal cycle and UV radiation have limited effect on the mechanical properties, recession behavior and temperature behavior of 3D CF/PEEK. Results from the arc heating test showed an expansion of the sample surface and better recession resistance than other existing ablator materials. Overall, 3D CF/PEEK has excellent recession resistance while maintaining mechanical properties when exposed to high temperature, thermal cycle and UV radiation.

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Effects of potassium titanate whisker and glass fiber on tribological and mechanical properties of PTFE/PEEK blend

High Performance Polymers ◽

10.1177/0954008317723444 ◽

2017 ◽

Vol 30 (6) ◽

pp. 752-764 ◽

Cited By ~ 3

Author(s):

Xue Teng ◽

Lefei Wen ◽

Yunxia Lv ◽

Wenge Tang ◽

Xiaogang Zhao ◽

...

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Friction Coefficient ◽

Wear Rate ◽

Glass Fiber ◽

Tribological Properties ◽

Reinforcing Effect ◽

Potassium Titanate ◽

Polyether Ether Ketone ◽

Ether Ketone

Two series of 10% polytetrafluoroethylene (PTFE)/polyether ether ketone (PEEK) composites reinforced with potassium titanate whisker (PTW/PTFE/PEEK) and chopped glass fiber (GF/PTFE/PEEK) were prepared and characterized. We investigated the effects of the additives on thermal stability, tribological properties, mechanical properties, and rheological behavior. The results illustrated that the mechanical properties of 10% PTFE/PEEK blend can be dramatically improved by incorporating either PTW or GF; however, the reinforcing effect of GF was found to be superior. It was found that 1% additive resulted in blends with the best tribological properties. Compared to the unmodified blend, the friction coefficient and wear rate of the 1% PTW blend decreased by 7.2% and 21%, respectively, while the corresponding values of 1% GF blend decreased by 0.66% and 51%, respectively.

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Studying Mechanical Properties Specially Fatigue Behavior of (Polyether Ether Ketone)/Glass Fiber Composites in Aerospace Applications

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.666.8 ◽

2014 ◽

Vol 666 ◽

pp. 8-16

Author(s):

A. Saad Najim ◽

Mohammed Adwaa

Keyword(s):

Mechanical Properties ◽

Glass Fiber ◽

High Performance ◽

Fatigue Behavior ◽

Fatigue Properties ◽

Glass Fiber Composites ◽

Aerospace Applications ◽

Polyether Ether Ketone ◽

High Performance Composite ◽

Ether Ketone

This work deals with studying the mechanical properties specially fatigue behavior for high performance composite materials of poly ether ether ketone (PEEK)/glass fiber, which are used in Aircraft Industry. Two materials have been used: (PEEK natural) and (PEEK+30% glass fiber).To identify the type of (PEEK), infrared (FTIR) test has been conducted. X-ray test has been used to measure the (PEEK) crystalline ,also the tensile properties, impact strength and the fatigue test are performed.The results show that FTIR test peaks are for standard PEEK polymer and that GFRP increases the crystalline of (PEEK) material , while the tensile , impact and fatigue properties of (PEEK) decreases by adding GF to PEEK .

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The Role of Polyether Ether Ketone (Peek) in Dentistry – A Review

Journal of Medicine and Life ◽

10.25122/jml-2019-0003 ◽

2019 ◽

Vol 12 (1) ◽

pp. 5-9 ◽

Cited By ~ 11

Author(s):

Lakshmana Bathala ◽

◽

Vaishnavi Majeti ◽

Narendra Rachuri ◽

...

Keyword(s):

Mechanical Properties ◽

Literature Search ◽

Developed Countries ◽

Dental Practice ◽

Metal Free ◽

Polyether Ether Ketone ◽

Superior Mechanical Properties ◽

Ether Ketone ◽

Online Library

This study is aimed to review the applications of Polyether Ether Ketone (PEEK) in dentistry. The increased demand for aesthetics, legislation in some developed countries, few drawbacks with existing materials and clinicians shifting their paradigms towards metal free restorations led space for the metal-free restorations in today’s dental practice. An electronic literature search was conducted through Medline via PubMed, Wiley Online library, EBSCOhost, Science Direct, as well as the Google Scholar between January 2010 and March 2018 using the keywords: PEEK, modified PEEK, PEEK and Dental, advantages of PEEK, applications of PEEK in dentistry and PEEK Implants. A total of 103 articles were found in the literature search and out of these, 18 were not related to our study and hence were excluded. Finally, 85 articles were found to be relevant. PEEK has been explained for a number of applications in dental practice. The literature showed that the PEEK material has superior mechanical properties with different uses in various specialties of dentistry.

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CONNECTION BETWEEN STRUCTURAL CHANGES OF IRRIADIATED POLYETHER ETHER KETONE AND MECHANICAL PROPERTIES

Tribologia ◽

10.5604/01.3001.0012.6981 ◽

2018 ◽

Vol 278 (2) ◽

pp. 95-101

Author(s):

Aneta NIEMIEC

Keyword(s):

Mechanical Properties ◽

Glass Transition ◽

Structural Changes ◽

Radiation Energy ◽

Degree Of Crystallinity ◽

Scanning Calorimetry ◽

Polyether Ether Ketone ◽

Ether Ketone ◽

The Impact ◽

The Degree Of Crystallinity

The article presents the results of research on the impact of structural changes in polyether ether ketone (PEEK) on its mechanical properties. The polymer was exposed to gamma radiation at a dose of 50 and 150 kGy, and the radiation energy was 4 MeV. Changes in the degree of crystallinity and the related changes in the glass transition and melting temperature for the polymer were determined by differential scanning calorimetry (DSC). Mechanical properties were determined using the micro-mentoring method. The tests showed a change in the degree of crystallinity in the range of several degrees and a significant increase in the glass transition temperature. In terms of mechanical properties, the reduction of hardness and Young’s modulus was observed. Observed changes, especially in terms of changes in the structure of the polymer under the influence of radiation, are difficult to explain, which requires conducting further research, especially in the range of irradiation parameters used. Further research is important because PEEK is used in many fields, especially in conditions conducive to corrosion and the influence of radiation.

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Modelling of mechanical properties of randomly oriented strand thermoplastic composites

Journal of Composite Materials ◽

10.1177/0021998316654748 ◽

2016 ◽

Vol 51 (6) ◽

pp. 831-845 ◽

Cited By ~ 19

Author(s):

Marina Selezneva ◽

Steven Roy ◽

Sean Meldrum ◽

Larry Lessard ◽

Ali Yousefpour

Keyword(s):

Mechanical Properties ◽

Detrimental Effect ◽

Failure Criteria ◽

Thermoplastic Composites ◽

Weakest Link ◽

Polyether Ether Ketone ◽

Ether Ketone ◽

Prediction Of Mechanical Properties ◽

Element Technique ◽

Model Variability

There is an emerging interest in the aerospace industry to manufacture components with intricate geometries using discontinuous-fibre carbon/polyether-ether-ketone moulding systems (obtained by cutting unidirectional tape into strands). Great formability and high modulus can be achieved with this type of composites, but the high variability of measured properties can have a detrimental effect on the design allowables. When it comes to prediction of mechanical properties, it is important to capture the average strength and modulus as well as their statistical variability. This article proposes a stochastic finite element technique that uses the concept of randomly oriented strands to model variability, and the application of Hashin’s failure criteria and fracture energies to estimate strength. Overall, the model matches the trends observed during experiments and shows that strength of randomly oriented strand composites is significantly lower than that of continuous-fibre laminates due to the ‘weakest-link’ principle.

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