Drones are becoming more and more a part of modern life, being used for everything from military applications to delivering pizza, not to mention the growing number of hobbyists using them personally. Drones have come of age, so to speak, alongside 3D printing, and therefore 3D printing is commonly used to construct drones, also known as unmanned aerial vehicles or UAVs. In a paper entitled “Implementation of FDM technology in MALE UAVs,” a group of researchers discuss the advantages of using 3D printing for drone manufacture.
MALE stands for Medium Altitude Long Endurance. According to the researchers, there are numerous advantages of using 3D printing over other methods of fabrication. Using PLA makes UAVs more eco-friendly, for one thing, and also improves their strength to weight ratio. 3D printing allows designers to densify certain areas, such as the landing gear or nose tip, that will experience greater impact, while compensating by reducing weight elsewhere. The technology also makes it easier to create an aerodynamic design, and saves time, money and effort compared to other manufacturing methods.
In the study, the researchers developed a 3D printed drone fuselage, which is described as the “backbone” of the drone. It serves as a housing for payload as well as many other components, so there are several weight, aerodynamic and structural constraints that have to be considered in its design. The length of the fuselage also affects the stability of the drone, and it is important to streamline the body so that air can flow around it in such a way as to keep the drag effects low.
Other techniques are sometimes used for manufacturing the body of the drone, such as subtractive manufacturing of Styrofoam or Balsa wood, and while they have their own advantages they also have several disadvantages: a Styrofoam sheet is non-aerodynamic, while constructing a drone out of Balsa wood is “cumbersome as well as time-consuming.” In contrast, 3D printing a fuselage is easy and allows for a great deal of design freedom.
The researchers 3D printed several iterations of the drone before arriving at the final version, which was “aerodynamically stable as well as mechanically robust.” Stress analysis was performed using FEA simulations through an ANSYS tool. They analyzed both nose impact and belly impact.
In the nose impact analysis, the maximum force applied was 25 N and the maximum deformation was 1.09 mm.
“The analysis is oriented in such a manner that the wing berth is taken as fixed support thereas, the motor mount is assumed to have a ramped up force impact on it,” the researchers state. “The feature shows that the maximum deformation would occur at the joint of two different parts which were manufactured separately and then joined together using cyanoacrylate.”
For the belly impact analysis, the maximum force applied was 25 N and the maximum deformation was 1.1435 mm.
“As the fuselage is deemed to land on its belly during the landing approach,” the researchers continue. “Moreover, in any case the first impact would be on the bottom surface only. Considering the purview of the given problem statement, the analysis is shown above where the impacts on grilled bottom and wall surfaces have been shown.”
The researchers conclude that FDM 3D printing technology is an effective way of constructing drones, with excellent build precision and high strength to weight ratio. It allows varied material composition on different parts of the drone, and is overall simple, cost-effective and time-saving.
Authors of the paper include Ankur Dwivedi, Darshit Desai and Deepesh Agarwal.
Discuss this and other 3D printing topics at 3DPrintBoard.com or share your thoughts below.
Subscribe to Our Email Newsletter
Stay up-to-date on all the latest news from the 3D printing industry and receive information and offers from third party vendors.
You May Also Like
Battery 3D Printing Startup Sakuu Secures Japanese Spark Plug Leader for Ceramic Materials
As Bay Area startup Sakuu continues toward commercialization of its solid state battery (SSB) 3D printing technology, the company has secured a partnership with NGK Spark Plugs (TYO: 5334), a...
3D Printing News Unpeeled: Rocket Lab, Sierra Space, Caracol, 6K
We explore Rocket Lab and Sierra Space join alliance to help move troops and material via rockets for terrestrial transport, Sandhelden and Duffy London 3D printing a sand coffee table, Caracol...
Incodema3D Signals US Metal 3D Printing Scale-Up with 6K, Uniformity Deals
Incodema3D, an additive manufacturing (AM) services company specializing in the aerospace sector, announced two new projects recently, involving two different metal alloy powders. First, Incodema3D, which is headquartered in upstate...
UCLA Materials Scientists Awarded Grant for 3D Printed Batteries
The University of California, Los Angeles (UCLA) announced that a team of materials scientists at the university’s Samueli School of Engineering has received a grant to develop a new additive...