Journal
COMPOSITES PART B-ENGINEERING
Volume 216, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2021.108840
Keywords
Composites; Mechanical properties; Additive manufacturing; Fracture mechanics; Topology optimization
Funding
- National Research Foundation, Prime Minister's Office, Singapore under its Medium-Sized Centre funding scheme
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The mechanical properties of additively manufactured continuous carbon fiber-reinforced thermoplastic were investigated, leading to the design and fabrication of a UAV landing gear with excellent mechanical performance. Experimental data showed that the landing gear structure could withstand extreme conditions during operation.
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.
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