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Characterizing tensile loading responses of 3D printed samples

Author(s)
Haid, Christopher M
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Massachusetts Institute of Technology. Department of Mechanical Engineering.
Advisor
Sanjay E. Sarma.
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M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582
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Abstract
An experimental study was performed to characterize the loading response of samples manufactured through 3D printing. Tensile testing was performed on a number of 3D printed samples created through Fused Filament Fabrication (FFF). Printed samples were made from ABS or PLA plastic. A range of infill densities from 25% to 100% were tested for each material. Additionally, samples were printed with layers at several angles relative to the tensile loading of the sample. Failure modes were characterized as either delamination in the elastic region, delamination in the plastic region, brittle fracture, or ductile fracture. Loading response curves were analyzed to find the peak load, structural stiffness, load at plastic yield, and effective strain at failure. Samples loaded along the printed layers with 100% infill density displayed the most favorable mechanical properties. Samples loaded perpendicular or at an angle to the printed layers failed at smaller loads and displacements. Additionally, samples printed at less than 100% infill also tended to fail sooner.
Description
Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.
 
Cataloged from PDF version of thesis.
 
Includes bibliographical references (page 38).
 
Date issued
2014
URI
http://hdl.handle.net/1721.1/92183
Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Publisher
Massachusetts Institute of Technology
Keywords
Mechanical Engineering.

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