A review of ultrasonic testing applications in additive manufacturing: Defect evaluation, material characterization, and process control.

Improved design of fused deposition modeling equipment for 3D printing of high-performance PEEK parts

The complete mechanical properties (tensile, compressive, and shear properties) of the additively manufactured (AM) continuous carbon fiber-reinforced thermoplastic (CFRTP) fabricated using extrusion-based AM technique were investigated and reported The fracture modes of the AM CFRTP in various mechanical tests were studied and reported Anisotropic mechanical properties were observed in all mechanical tests, with the fiber direction having the highest strengths and stiffnesses and the across-the-layer direction having the lowest strengths and stiffnesses A proof of concept topology optimized unmanned aerial vehicle (UAV) landing gear was designed and fabricated using the mechanical properties obtained experimentally Finite element analysis and compressive tests conducted show that the UAV landing gear structure fabricated using the AM CFRTP was able to survive the most extreme condition during operation

Additively manufactured continuous carbon fiber-reinforced thermoplastic for topology optimized unmanned aerial vehicle structures

Fracture behavior of additively manufactured components: A review

Structural performance of 3D-printed composites under various loads and environmental conditions

A non-destructive experimental-cum-numerical methodology for the characterization of 3D-printed materials—polycarbonate-acrylonitrile butadiene styrene (PC-ABS)

Evaluation of structural epoxy and cyanoacrylate adhesives on jointed 3D printed polymeric materials

This paper investigates the orthotropic properties of Fused Deposition Modeling (FDM)-printed Acrylonitrile Styrene Acrylate (ASA) material with different raster configurations. The elastic propert...

Finite element analysis of 3D-Printed Acrylonitrile Styrene Acrylate (ASA) with Ultrasonic material characterization

Topology Optimization and 3D Printing of Micro-Drone: Numerical Design with Experimental Testing

Corotating coaxial rotors are seeing renewed interest in distributed electric propulsion systems and electric vertical take-off and landing (eVTOL) aircraft. The recent literature reports many interesting investigations, using prescribed rotor blades, into the flow phenomena as well as aerodynamic and aeroacoustic benefits of corotating rotors. However, the subject of the design of blade geometries, optimized to a design goal, for corotating rotors is currently lacking in the literature. This paper is written from such a design perspective, by extending a previous generalized approach to the aerodynamic optimization of counterrotating rotors to corotating rotors. The previous requirement for upper and lower counterrotating rotor torques to be equal can now be lifted in the case of corotating rotors, enabling improved versatility in the optimization of corotating blade designs. The optimization is demonstrated on an application example to address the conflicting conditions that index angles (high) for aeroacoustic benefits of reduced noise are at odds with those (low) for aerodynamic efficiency. The approach demonstrated in this paper is to set the index angle for reduced noise and then recover back the aerodynamic efficiency by using the newly developed aerodynamic optimization technique. 

Keen Ian Chan

Papers

A non-destructive experimental-cum-numerical methodology for the characterization of 3D-printed materials—polycarbonate-acrylonitrile butadiene styrene (PC-ABS)

Evaluation of structural epoxy and cyanoacrylate adhesives on jointed 3D printed polymeric materials

Finite element analysis of 3D-Printed Acrylonitrile Styrene Acrylate (ASA) with Ultrasonic material characterization

Topology Optimization and 3D Printing of Micro-Drone: Numerical Design with Experimental Testing

Aerodynamic Optimization of the Sizing and Blade Designs of Hovering Corotating Coaxial Rotors