Z-pinning approach for reducing mechanical anisotropy of 3D printed parts

Chad Duty; Jordan Failla; Seokpum Kim; Tyler Smith; John Lindahl; Alex Roschli; Brian Post; Lonnie Love; Vlastimil Kunc

Z-pinning approach for reducing mechanical anisotropy of 3D printed parts

Chad Duty, Jordan Failla, Seokpum Kim, Tyler Smith, John Lindahl, Alex Roschli, Brian Post, Lonnie Love, Vlastimil Kunc

Research output: Contribution to conference › Paper › peer-review

5 Scopus citations

Abstract

The mechanical strength of extrusion-based printed parts is often greatly reduced (25-50%) in the build direction (z-direction) compared to the in-plane strength due to poor bonding between successively deposited layers. This effect can be magnified (75-90% difference) when depositing fiber-reinforced materials or larger print areas with long layer times. Therefore, a patent-pending approach has been developed that deposits material into intentionally aligned voids in the z-direction, allowing continuous material to span multiple layers. The “z-pinning” approach can be applied to several concepts for improving the interlaminar strength of extrusion-based 3D printed parts as well as techniques for applying the technology across a broad spectrum of deposition platforms and material systems. Initial experimental results demonstrate a significant improvement (>3x) in mechanical strength and (>8x) toughness for fiber reinforced components.

Original language	English
Pages	2405-2412
Number of pages	8
State	Published - 2020
Event	29th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2018 - Austin, United States Duration: Aug 13 2018 → Aug 15 2018

Conference

Conference	29th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2018
Country/Territory	United States
City	Austin
Period	08/13/18 → 08/15/18

Funding

A portion of the research was sponsored by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office, under contract DE-AC05-00OR22725 with UT-Battelle, LLC.

Funders	Funder number
U.S. Department of Energy
Advanced Manufacturing Office	DE-AC05-00OR22725
Office of Energy Efficiency and Renewable Energy

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Cite this

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title = "Z-pinning approach for reducing mechanical anisotropy of 3D printed parts",

abstract = "The mechanical strength of extrusion-based printed parts is often greatly reduced (25-50%) in the build direction (z-direction) compared to the in-plane strength due to poor bonding between successively deposited layers. This effect can be magnified (75-90% difference) when depositing fiber-reinforced materials or larger print areas with long layer times. Therefore, a patent-pending approach has been developed that deposits material into intentionally aligned voids in the z-direction, allowing continuous material to span multiple layers. The “z-pinning” approach can be applied to several concepts for improving the interlaminar strength of extrusion-based 3D printed parts as well as techniques for applying the technology across a broad spectrum of deposition platforms and material systems. Initial experimental results demonstrate a significant improvement (>3x) in mechanical strength and (>8x) toughness for fiber reinforced components.",

author = "Chad Duty and Jordan Failla and Seokpum Kim and Tyler Smith and John Lindahl and Alex Roschli and Brian Post and Lonnie Love and Vlastimil Kunc",

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AU - Duty, Chad

AU - Failla, Jordan

AU - Kim, Seokpum

AU - Smith, Tyler

AU - Lindahl, John

AU - Roschli, Alex

AU - Post, Brian

AU - Love, Lonnie

AU - Kunc, Vlastimil

N1 - Publisher Copyright: © Solid Freeform Fabrication 2018: Proceedings of the 29th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2018. All Rights Reserved.

PY - 2020

Y1 - 2020

N2 - The mechanical strength of extrusion-based printed parts is often greatly reduced (25-50%) in the build direction (z-direction) compared to the in-plane strength due to poor bonding between successively deposited layers. This effect can be magnified (75-90% difference) when depositing fiber-reinforced materials or larger print areas with long layer times. Therefore, a patent-pending approach has been developed that deposits material into intentionally aligned voids in the z-direction, allowing continuous material to span multiple layers. The “z-pinning” approach can be applied to several concepts for improving the interlaminar strength of extrusion-based 3D printed parts as well as techniques for applying the technology across a broad spectrum of deposition platforms and material systems. Initial experimental results demonstrate a significant improvement (>3x) in mechanical strength and (>8x) toughness for fiber reinforced components.

AB - The mechanical strength of extrusion-based printed parts is often greatly reduced (25-50%) in the build direction (z-direction) compared to the in-plane strength due to poor bonding between successively deposited layers. This effect can be magnified (75-90% difference) when depositing fiber-reinforced materials or larger print areas with long layer times. Therefore, a patent-pending approach has been developed that deposits material into intentionally aligned voids in the z-direction, allowing continuous material to span multiple layers. The “z-pinning” approach can be applied to several concepts for improving the interlaminar strength of extrusion-based 3D printed parts as well as techniques for applying the technology across a broad spectrum of deposition platforms and material systems. Initial experimental results demonstrate a significant improvement (>3x) in mechanical strength and (>8x) toughness for fiber reinforced components.

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M3 - Paper

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ER -

Z-pinning approach for reducing mechanical anisotropy of 3D printed parts

Abstract

Conference

Funding

UN SDGs

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