RT info:eu-repo/semantics/article T1 Print velocity effects on strain-rate sensitivity of acrylonitrile-butadiene-styrene using material extrusion additive manufacturing A1 Verbeeten, Wilco M.H. A1 Arnold-Bik, Rob J. A1 Lorenzo BaƱuelos, Miriam K1 3D printing K1 ABS K1 printing speed K1 strain-rate dependent yield stress K1 process-induced molecular orientation K1 Eyring rate equation K1 strain-dependent activation volume K1 Resistencia de materiales K1 Strength of materials AB 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 mechanicalproperties. Apparent densities were measured to compensate for the interstitial voids. Three differentprinting speeds were used to generate ME-AM tensile test samples with different molecularorientation. Printing velocities influenced molecular orientation and stretch, as determined fromthermal shrinkage measurements. Likewise, infill velocity affected the strain-rate dependence of theyield stress. The ABS material manifests thermorheollogically simple behavior that can correctly bedescribed 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-inducedpre-strain. Therefore, it is suggested that ME-AM processed ABS shows a deformation-dependentactivation volume. This paper can be seen as initial work that can help to improve quantitativepredictive numerical tools for ME-AM, taking into account the effects that the processing step has onthe mechanical properties. PB MDPI YR 2021 FD 2021-01 LK http://hdl.handle.net/10259/5641 UL http://hdl.handle.net/10259/5641 LA eng DS Repositorio Institucional de la Universidad de Burgos RD 29-mar-2024