Using dynamic mechanical analysis (DMA), we investigate differences in the properties of a single-filament wall polyether ether ketone (PEEK) constructed using fused filament fabrication (FFF) under range different printing conditions. Since PEEK is semi-crystalline polymer, employ non-isothermal quiescent crystallization model, informed by infra-red (IR)-imaging measurements, to understand our...

• PEI film inclusions improve the Mode I and II interlaminar toughness performance of CF/PEEK laminates. laminates toughened with at delamination susceptible ply interfaces exhibited superior impact relative to baseline a smaller damage footprint Unlike thermoset based composite laminates, all tested on surface. This is useful attribute in aerospace structures, where barely visible (BVID) conce...

In this Technical Note, we describe a method of mini-open long head biceps subpectoral tenodesis. The implant used is a threadless expanding PEEK (polyether ether ketone) interference device that fixes the biceps tendon in a drill hole in the humerus under the inferior border of the pectoralis major tendon. The diameter of the drill hole varies between 6 and 8 mm depending on the width of the t...

The use of composite materials is growing more and more every day in several applications. The arrangement or orientation of the fibers relative to one another have a significant influence on the strength and other properties of fiber reinforced composites. Thus, evaluation techniques are needed for measuring material fiber orientation. In this work Infrared Thermography is employed to assess t...

Electrically conductive polymers reinforced with carbon nanotubes (CNTs) have generated a great deal of scientific and industrial interest in the last few years. Advanced thermoplastic composites made of three different weight percentages (8%, 9%, and 10%) of multiwalled CNTs and polyether ether ketone (PEEK) were prepared by shear mixing process. The temperature- and pressure-dependent electri...

Carbon-fiber reinforced composites are widely used in the industry. One of the key features regarding their quality and usefulness is related to the fiber orientation and contend. One technique that is used to test this kind of material is Infrared Thermography (IT). In this paper it is presented a technique based on diode-laser spot heating to measure fiber orientation on the surface of a carb...