Document Type

Thesis - Open Access

Award Date

2019

Degree Name

Master of Science (MS)

Department / School

Mechanical Engineering

First Advisor

Todd Letcher

Abstract

Several studies have been conducted on FDM 3d printed materials such as PLA (Polylactic Acid) and ABS (Acrylonitrile Butadiene Styrene), however, not for ASA (Acrylonitrile Styrene Acrylate). The use of ASA has been increasing due to its resistance to UV, heat, and some chemicals. The resistance to UV prevents the material from degrading its material properties in common outdoor conditions, whereas resistance to heat and oil prevents the material from discoloration. This combination of effects allows designers to use ASA in outdoor applications, however, material properties for ASA in the FDM 3d printing manufacturing process are not well defined. It has been shown for many other FDM 3d printed materials that raster orientation used for manufacturing parts can play an important role in predicting part strength. In this study, raster orientations used were 0⁰, +/-45⁰, and 90⁰. To perform the tests, MTS Universal Testing Machines were used along with Digital Image Correlation (DIC) to measure strain. DIC was incorporated to replace the use of strain gauge in the sample to find poisons ratio of the material. The results showed that raster orientation affects some material properties significantly, such as tensile, impact and flexural test. In these cases, 0⁰ raster orientation produced the highest result whereas +/-45⁰ and 90⁰ produced a similar lower strength. For other tests, such as compression, fatigue, and shear, raster orientation had a much weaker effect on part strengths.

Library of Congress Subject Headings

Acrylonitrile.
Styrene.
Acrylates -- Mechanical properties.
Three-dimensional printing.

Format

application/pdf

Number of Pages

79

Publisher

South Dakota State University

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Rights Statement

In Copyright