Dynamic stiffness modification by internal features in additive manufacturing

Emma D. Betters; Justin West; Mark Noakes; Andrzej Nycz; Scott Smith; Tony L. Schmitz

doi:10.1016/j.precisioneng.2020.04.024

Dynamic stiffness modification by internal features in additive manufacturing

Emma D. Betters, Justin West, Mark Noakes, Andrzej Nycz, Scott Smith, Tony L. Schmitz

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Dynamic stiffness, or the product of the modal stiffness and damping ratio, is an important consideration for the design of additively manufactured parts that will experience dynamic loading. This paper describes a demonstration component which was designed and manufactured in two configurations using a metal wire arc additive process. The first configuration was an open channel structure, while the second contained a dynamic absorber in the internal cavity. Frequency response measurements of the two components showed a significant magnitude reduction for the modified component at the original open channel structure's natural frequency and an overall increase in dynamic stiffness. Polymer damping material was then added to further increase the dynamic stiffness.

Original language	English
Pages (from-to)	125-134
Number of pages	10
Journal	Precision Engineering
Volume	66
DOIs	https://doi.org/10.1016/j.precisioneng.2020.04.024
State	Published - Nov 2020

Funding

This material is based upon work supported by the U.S. Department of Energy, Office of Science, Advanced Manufacturing Office under contract number DE-AC05-00OR22725 , and used resources at the Manufacturing Demonstration Facility at Oak Ridge National Laboratory , a DOE Office of Science User Facility. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Advanced Manufacturing Office under contract number DE-AC05-00OR22725, and used resources at the Manufacturing Demonstration Facility at Oak Ridge National Laboratory, a DOE Office of Science User Facility. Notice: This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).

Keywords

Additive manufacturing
Dynamic stiffness
Hybrid manufacturing
Machining
Structural dynamics

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10.1016/j.precisioneng.2020.04.024

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title = "Dynamic stiffness modification by internal features in additive manufacturing",

abstract = "Dynamic stiffness, or the product of the modal stiffness and damping ratio, is an important consideration for the design of additively manufactured parts that will experience dynamic loading. This paper describes a demonstration component which was designed and manufactured in two configurations using a metal wire arc additive process. The first configuration was an open channel structure, while the second contained a dynamic absorber in the internal cavity. Frequency response measurements of the two components showed a significant magnitude reduction for the modified component at the original open channel structure's natural frequency and an overall increase in dynamic stiffness. Polymer damping material was then added to further increase the dynamic stiffness.",

keywords = "Additive manufacturing, Dynamic stiffness, Hybrid manufacturing, Machining, Structural dynamics",

author = "Betters, {Emma D.} and Justin West and Mark Noakes and Andrzej Nycz and Scott Smith and Schmitz, {Tony L.}",

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year = "2020",

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doi = "10.1016/j.precisioneng.2020.04.024",

language = "English",

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AU - West, Justin

AU - Noakes, Mark

AU - Nycz, Andrzej

AU - Smith, Scott

AU - Schmitz, Tony L.

PY - 2020/11

Y1 - 2020/11

N2 - Dynamic stiffness, or the product of the modal stiffness and damping ratio, is an important consideration for the design of additively manufactured parts that will experience dynamic loading. This paper describes a demonstration component which was designed and manufactured in two configurations using a metal wire arc additive process. The first configuration was an open channel structure, while the second contained a dynamic absorber in the internal cavity. Frequency response measurements of the two components showed a significant magnitude reduction for the modified component at the original open channel structure's natural frequency and an overall increase in dynamic stiffness. Polymer damping material was then added to further increase the dynamic stiffness.

AB - Dynamic stiffness, or the product of the modal stiffness and damping ratio, is an important consideration for the design of additively manufactured parts that will experience dynamic loading. This paper describes a demonstration component which was designed and manufactured in two configurations using a metal wire arc additive process. The first configuration was an open channel structure, while the second contained a dynamic absorber in the internal cavity. Frequency response measurements of the two components showed a significant magnitude reduction for the modified component at the original open channel structure's natural frequency and an overall increase in dynamic stiffness. Polymer damping material was then added to further increase the dynamic stiffness.

KW - Additive manufacturing

KW - Dynamic stiffness

KW - Hybrid manufacturing

KW - Machining

KW - Structural dynamics

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EP - 134

JO - Precision Engineering

JF - Precision Engineering

ER -

Dynamic stiffness modification by internal features in additive manufacturing

Abstract

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Keywords

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