A. Aitchison
Localised pre-heating to improve inter-layer delamination strength in fused deposition modelling
Aitchison, A.; Wang, Q.
Abstract
Additive manufacture, specifically Fused Deposition Modeling (FDM), is an advancing manufacture method opening up new possibilities in design previously impossible to machine, in a relatively affordable way. However, its use in functional products is limited due to anisotropic strength and reduced strength from injection molded components. This paper aims to increase the tensile strength of Acrylonitrile Butadiene Styrene (ABS) in the weakest direction (Z axis), where poor interlayer fusion and air gaps between extruded trails reduce strength. Extra thermal energy was applied to the top surface layer during the printing process (through hot air) to encourage more polymer chain diffusion across the boundary, and spreading out to fill air gaps. Multiple tensile test samples were printed at a variety of heat levels. The ultimate tensile strength σuts was plotted against these temperatures and a weak positive correlation was found. However, only air temperatures above 81oC increased strength past the control to a maximum of 1.4MPa. Heat application has proven to increase tensile strength, but needs to be applied with a more precise method, to the boundary interface, to allow greater thermal energy transfer without sacrificing print quality.
Citation
Aitchison, A., & Wang, Q. (2019). Localised pre-heating to improve inter-layer delamination strength in fused deposition modelling.
Conference Name | The ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference (IDETC/CIE 2019) |
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Conference Location | Anaheim, California, USA |
End Date | Aug 21, 2019 |
Acceptance Date | May 23, 2019 |
Publication Date | Jan 1, 2019 |
Deposit Date | Jun 9, 2019 |
Publisher | American Society of Mechanical Engineers |
Series Title | Proceedings of the ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference (IDETC/CIE 2019) |
Publisher URL | https://event.asme.org/IDETC-CIE |
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