Print Velocity Effects on Strain-Rate Sensitivity of Acrylonitrile-Butadiene-Styrene Using Material Extrusion Additive Manufacturing

Verbeeten, Wilco M. H. and Arnold-Bik, Rob J. and Lorenzo-Bañuelos, Miriam (2021) Print Velocity Effects on Strain-Rate Sensitivity of Acrylonitrile-Butadiene-Styrene Using Material Extrusion Additive Manufacturing. Polymers, 13 (1). p. 149. ISSN 2073-4360

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Abstract

The strain-rate sensitivity of the yield stress for Acrylonitrile-Butadiene-Styrene (ABS) tensile samples processed via material extrusion additive manufacturing (ME-AM) was investigated. Such specimens show molecular orientation and interstitial voids that affect the mechanical properties. Apparent densities were measured to compensate for the interstitial voids. Three different printing speeds were used to generate ME-AM tensile test samples with different molecular orientation. Printing velocities influenced molecular orientation and stretch, as determined from thermal shrinkage measurements. Likewise, infill velocity affected the strain-rate dependence of the yield stress. The ABS material manifests thermorheollogically simple behavior that can correctly be described by an Eyring flow rule. The changing activation volume, as a result of a varying print velocity, scales linearly with the molecular orientation, as captured in an estimated processing-induced pre-strain. Therefore, it is suggested that ME-AM processed ABS shows a deformation-dependent activation volume. This paper can be seen as initial work that can help to improve quantitative predictive numerical tools for ME-AM, taking into account the effects that the processing step has on the mechanical properties.

Item Type: Article
Uncontrolled Keywords: 3D printing; ABS; printing speed; strain-rate dependent yield stress; process-induced molecular orientation; Eyring rate equation; strain-dependent activation volume
Subjects: STM Repository > Chemical Science
Depositing User: Managing Editor
Date Deposited: 17 Jan 2023 07:16
Last Modified: 12 Aug 2024 10:15
URI: http://classical.goforpromo.com/id/eprint/766

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