2024-03-29T12:53:15Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/56412021-11-02T12:04:45Zcom_10259_4201com_10259_5086com_10259_2604col_10259_4505
Print velocity effects on strain-rate sensitivity of acrylonitrile-butadiene-styrene using material extrusion additive manufacturing
Verbeeten, Wilco M.H.
Arnold-Bik, Rob J.
Lorenzo BaƱuelos, Miriam
3D printing
ABS
printing speed
strain-rate dependent yield stress
process-induced molecular orientation
Eyring rate equation
strain-dependent activation volume
Resistencia de materiales
Strength of materials
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.
2021-03-10T12:48:54Z
2021-03-10T12:48:54Z
2021-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://hdl.handle.net/10259/5641
10.3390/polym13010149
2073-4360
eng
Polymers.. 2021, V. 13, n. 1, 13010149
https://doi.org/10.3390/polym13010149
AtribuciĆ³n 4.0 Internacional
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
application/pdf
MDPI