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1 – 2 of 2Jiongyi Yan, Emrah Demirci and Andrew Gleadall
Extrusion width, the width of printed filaments, affects multiple critical aspects in mechanical properties in material extrusion additive manufacturing: filament geometry…
Abstract
Purpose
Extrusion width, the width of printed filaments, affects multiple critical aspects in mechanical properties in material extrusion additive manufacturing: filament geometry, interlayer load-bearing bonded area and fibre orientation for fibre-reinforced composites. However, this study aims to understand the effects of extrusion width on 3D printed composites, which has never been studied systematically.
Design/methodology/approach
Four polymers with and without short-fibre reinforcement were 3D printed into single-filament-wide specimens. Tensile properties, mechanical anisotropy and fracture mechanisms were evaluated along the direction of extruded filaments (F) and normal to the interlayer bond (Z). Extrusion width, nozzle temperature and layer height were studied separately via single-variable control. The extrusion width was controlled by adjusting polymer flow in the manufacturing procedure (gcode), where optimisation can be achieved with software/structure design as opposed to hardware.
Findings
Increasing extrusion width caused a transition from brittle to ductile fracture, and greatly reduced directional anisotropy for strength and ductility. For all short fibre composites, increasing width led to an increase in strain-at-break and decreased strength and stiffness in the F direction. In the Z direction, increasing width led to increased strength and strain-at-break, and stiffness decreased for less ductile materials but increased for more ductile materials.
Originality/value
The transformable fracture reveals the important role of extrusion width in processing-structure-property correlation. This study reveals a new direction for future research and industrial practice in controlling anisotropy in additive manufacturing. Increasing extrusion width may be the simplest way to reduce anisotropy while improving printing time and quality in additive manufacturing.
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The present paper aims at defining and analyzing the techniques, strategies, and challenges in translating the euphemism of two English interpretations of the Holy Quran. The…
Abstract
Purpose
The present paper aims at defining and analyzing the techniques, strategies, and challenges in translating the euphemism of two English interpretations of the Holy Quran. The first is the translation of Abdullah Yusuf Ali (14 April 1872–10 December 1953), whereas the second is the translation of Arthur John Arberry (12 May 1905–2 October 1969).
Design/methodology/approach
The study adopts a qualitative approach that is introduced through a theoretical framework thatdiscusses and elaborates on the term “euphemism”. After that, the study uses analytical approaches in order to define and analyze the techniques and strategies in translating the euphemism of two English interpretations of the Holy Quran.
Findings
The results elaborate on the techniques used by the two translators to translate the euphemisms of two English interpretations of the Holy Quran.
Originality/value
The reason for selecting these two translations is to find the different techniques and approaches of both Eastern and Western translators. The main analysis of the study is based on Newmark’s perceptions about the techniques and strategies of translation.
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