Authors:

Joseph Meier

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About Paper:

Composites are vital to many engineering fields, including mechanical, civil, and aerospace, due to their versatility and customizability. Incorporating composites into additive manufacturing (AM) allows for great improvements to the complex geometric capabilities of printed components by being able to tailor material properties to specific applications. For example, combining ceramic particles and elastomers, desirable mechanical properties can be enhanced, including increased compressive Young's modulus compared to unmodified elastomer and increased failure stress compared to unmodified ceramic. Ceramic/elastomer composites have yet to make their way into the realm of AM despite their potential for enabling the production of intricate components with improved mechanical properties. To address this lack of ceramic/elastomer composites in AM, this work describes the manufacturing and characterization of a representative alumina ceramic modified thermoplastic polyurethane (TPU) composite filament for fused filament fabrication (FFF). Alumina/TPU composite material was manufactured using a novel wet mix method previously developed within this research group. Composites of 10, 20, and 30 wt.% alumina to TPU were manufactured and extruded to produce filament for FFF. These materials, along with unmodified TPU, were mechanically characterized using tensile, compressive, and impact loading states. The results of the mechanical tests will be compared to examine the effect of the ceramic inclusions on Young's modulus in tension and compression, elongation at break, and energy absorption. Gaining an understanding in fabricating ceramic/elastomer composite filament presents an exciting opportunity to manufacture FFF printed components with customizable and tailorable mechanical characteristics such as improved impact resistance and biaxial stiffness properties.

Source:

Purdue University / 2023

Topics:

No topics listed

Co-authors:

Joseph Meier