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Experimental Mechanics
Erschienen in: Experimental Mechanics 9/2021

20.07.2021 | Research paper

The Effect of Variable Nozzle Temperature and Cross-Sectional Pattern on Interlayer Tensile Strength Of 3D Printed ABS Specimens

verfasst von: M. Foppiano, A. Saluja, K. Fayazbakhsh

Erschienen in: Experimental Mechanics | Ausgabe 9/2021

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Abstract

Background

Fused filament fabrication (FFF) introduces anisotropic material properties to the final parts, which includes minimum interlayer values. In this study, ASTM D638 type I specimens are 3D printed from acrylonitrile butadiene styrene (ABS) in the upright build direction and their tensile properties are evaluated.

Objective

Higher nozzle temperature outside the narrow section is proposed to improve tensile properties and move the breakage location towards the specimen center. Time spent above the glass transition temperature in the specimens is suggested as an indicator of their local strength.

Methods

An enclosure is built for a LulzBot Taz 6 desktop 3D printer that allows thermal imaging without interference from the environment. Temperature and humidity inside and outside the enclosure, and specimen mass are recorded. An automation script is developed to extract the temperature history of the deposited layers during 3D printing along the specimens.

Results

Optimum cross-sectional pattern for maximum tensile properties is the one with all walls and no infill. Nozzle temperature is varied from 220 to 260 °C in 10 °C increments and 231 °C is found as optimum for highest tensile properties. Using the optimum nozzle temperature of 231 °C in the narrow section, and a higher temperature of 261 °C in the grip sections and transition areas moves the breakage location towards the specimen center.

Conclusions

Time spent above the glass transition temperature agrees well with breakage location of the specimens. The impact of humidity on tensile properties is found to be more pronounced than the specimen mass.
Vorheriger Artikel Multi-view Digital Image Correlation Systems for In Vitro Testing of Arteries from Mice to Humans
Nächster Artikel Efficient Experimental and Data-Centered Workflow for Microstructure-Based Fatigue Data

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Metadaten
Titel
The Effect of Variable Nozzle Temperature and Cross-Sectional Pattern on Interlayer Tensile Strength Of 3D Printed ABS Specimens
verfasst von
M. Foppiano
A. Saluja
K. Fayazbakhsh
Publikationsdatum
20.07.2021
Verlag
Springer US
Erschienen in
Experimental Mechanics / Ausgabe 9/2021
Print ISSN: 0014-4851
Elektronische ISSN: 1741-2765
DOI
https://doi.org/10.1007/s11340-021-00757-y

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