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Effects of Holes on 3D Printed Polymer in Tension

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Canyon, Texas

Publication Date

March 10, 2024

Start Date

March 10, 2024

End Date

March 12, 2024

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Ryan McGuire University of New Mexico

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Ryan McGuire is currently an Undergraduate Mechanical Engineering student at the University of New Mexico. He is currently a member of the University of New Mexico's National Solar Splash team, a participant in the University's Shared Credit Program, and is working with Dr. Khraishi to pursue his interest in materials research.

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Tariq Khraishi University of New Mexico

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Khraishi currently serves as a Professor of Mechanical Engineering at the University of New Mexico. His general research interests are in theoretical, computational and experimental solid mechanics and materials science. He has taught classes in Dynamics,

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The purpose of this study is to examine the effects of holes in 3D printed nylon polymer samples in tension. The samples were designed with a cross-sectional area of 25 mm2 (width of 12.5 mm and thickness of 2 mm) with a gage length of 47.5 mm. Three main types of samples were then designed. The first of which had no holes and thus was labeled as a base. The second type of sample had small holes with a 2 mm diameter. The third type of sample had the largest sized holes with double the area of the medium size, with a diameter of 4 mm. Each of the samples with holes were then subdivided into 3 types, 1 holes, 2 holes in line with the direction of tension, and 3 holes in line with the direction of tension. Each sample was printed on a Markforged Mark Two 3D printer with the Nylon White filament and no composite fibers or materials. The samples were then labeled with the following format, NO-S. N was the number of holes (0, 1, 2, 3), O was the size and orientation of the holes [iL (in line and small) and L (Large)], and S was the sample number. The hole interaction and growth were then captured and recorded in relation to the applied displacement rate of 15 mm/min in a single column tensile tester. This was done by using a slow-motion video during the test and by photographing the sample before and after the test was conducted. The results of this examination have yielded hole interaction and an increase of ductility as the number and size of holes increased. The largest and highest number of holes experiencing a slight decrease in strength with an increased ductility when compared to the base sample.

McGuire, R., & Khraishi, T. (2024, March), Effects of Holes on 3D Printed Polymer in Tension Paper presented at 2024 ASEE-GSW, Canyon, Texas. 10.18260/1-2--45373

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