Use of Auxetic Infill Structures for the Compensation of Shrinkage in Fused Filament Fabrication Process

Date

2022-06-19

Author

Uncu, Rahman
Bacıkoğlu, Mehmet Canberk
Caliskan, Burak
Yaman, Ulaş

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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The polymer parts fabricated by Fused Filament Fabrication (FFF) process deteriorated noticeably in terms of dimensional accuracy due to the thermal processes during the fabrication and cooling phases. Commonly, researchers tend to concentrate on modifying the CAD model or fabricating the parts larger than the nominal then post-processing the artifacts to compensate for shrinkage. This paper investigates the effects of auxetic infill structures on shrinkage compensation. Parts with different internal geometries and infill structures were designed and fabricated via FFF using polylactic acid material. Critical dimensions of these parts were measured on a Coordinate Measuring Machine to observe the effects of different infill patterns on the dimensional accuracy of the parts. Measurement results showed that using an auxetic infill pattern with a symmetrical layout improves the accuracy of the parts significantly.

URI

https://hdl.handle.net/11511/106525

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Department of Mechanical Engineering, Conference / Seminar