Although new generation carbon fibre reinforced thermoplastic (CFRTP) such as polyetherketoneketone (CF/PEKK) is a promising sustainable alternative to the conventional thermoset plastic (CFRP), there lack of literature regarding its machining performance. This first study unveiling temperature evolution during drilling CF/PEKK and potential impact on associated material damages. Through compar...

We designed a robotic fish caudal fin with six individually moveable fin rays based on the tail of the bluegill sunfish, Lepomis macrochirus. Previous fish robotic tail designs have loosely resembled the caudal fin of fishes, but have not incorporated key biomechanical components such as fin rays that can be controlled to generate complex tail conformations and motion programs similar to those ...

1. The tail thrust of bluefish Pomatomus saltatrix was measured using a body accelerometer at different water speeds, buoyancies, and angles of water flow to determine the contribution of tail thrust in overcoming parasitic drag, induced drag, and weight directed along the track. The lengths and weights of the fish averaged 0.52 m and 1.50 kg respectively. 2. The tail thrust overcoming parasiti...

Abstract Although substantial research work has been conducted in order to understand and improve the drilling of multi-material aerospace stacks, some key aspects related process tool parameters their impact on interface quality still need be addressed. This paper reports investigate point angle interlayer gap width borehole quality, focussing region. A number tests were carried out using tool...