Damage precursor indicator for aluminum 7075-T6 based on nonlinear dynamics

Robert A. Haynes; Ed Habtour; Todd C. Henry; Daniel P. Cole; Volker Weiss; Antonios Kontsos; Brian Wisner

doi:10.1007/978-3-319-74280-9_32

Damage precursor indicator for aluminum 7075-T6 based on nonlinear dynamics

Robert A. Haynes, Ed Habtour, Todd C. Henry, Daniel P. Cole, Volker Weiss, Antonios Kontsos, Brian Wisner

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Scopus citations

Abstract

In this work, a damage precursor indicator for aluminum 7075-T6 is proposed based on the nonlinear dynamics of a cantilevered beam system. A shouldered beam specimen is used to move the region of highest stress away from the clamped end. The beam is subject to harmonic base excitation in a uniaxial shaker. Fatigue damage accumulates in the beam with damage forming most quickly in the region of highest stress. By monitoring the tip deflection, changes in the natural frequency and response to a given excitation are correlated to fatigue life. Despite the absence of large-scale cracks, detectable changes in the nonlinear dynamics are discovered. The nonlinear dynamic parameters are estimated capturing the change in the forward and backward nonlinear sine sweeps. These changes could lend themselves to being a trackable damage precursor. The presence of microstructural precursors are confirmed using nanoindentation.

Original language	English (US)
Title of host publication	Nonlinear Dynamics - Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018
Editors	Gaetan Kerschen
Publisher	Springer Science and Business Media, LLC
Pages	303-313
Number of pages	11
ISBN (Print)	9783319742793
DOIs	https://doi.org/10.1007/978-3-319-74280-9_32
State	Published - 2019
Externally published	Yes
Event	36th IMAC, A Conference and Exposition on Structural Dynamics, 2018 - Orlando, United States Duration: Feb 12 2018 → Feb 15 2018

Publication series

Name	Conference Proceedings of the Society for Experimental Mechanics Series
Volume	1
ISSN (Print)	2191-5644
ISSN (Electronic)	2191-5652

Conference

Conference	36th IMAC, A Conference and Exposition on Structural Dynamics, 2018
Country/Territory	United States
City	Orlando
Period	2/12/18 → 2/15/18

All Science Journal Classification (ASJC) codes

General Engineering
Computational Mechanics
Mechanical Engineering

Access to Document

10.1007/978-3-319-74280-9_32

Cite this

Haynes, R. A., Habtour, E., Henry, T. C., Cole, D. P., Weiss, V., Kontsos, A., & Wisner, B. (2019). Damage precursor indicator for aluminum 7075-T6 based on nonlinear dynamics. In G. Kerschen (Ed.), Nonlinear Dynamics - Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018 (pp. 303-313). (Conference Proceedings of the Society for Experimental Mechanics Series; Vol. 1). Springer Science and Business Media, LLC. https://doi.org/10.1007/978-3-319-74280-9_32

Haynes, Robert A. ; Habtour, Ed ; Henry, Todd C. et al. / Damage precursor indicator for aluminum 7075-T6 based on nonlinear dynamics. Nonlinear Dynamics - Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018. editor / Gaetan Kerschen. Springer Science and Business Media, LLC, 2019. pp. 303-313 (Conference Proceedings of the Society for Experimental Mechanics Series).

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title = "Damage precursor indicator for aluminum 7075-T6 based on nonlinear dynamics",

abstract = "In this work, a damage precursor indicator for aluminum 7075-T6 is proposed based on the nonlinear dynamics of a cantilevered beam system. A shouldered beam specimen is used to move the region of highest stress away from the clamped end. The beam is subject to harmonic base excitation in a uniaxial shaker. Fatigue damage accumulates in the beam with damage forming most quickly in the region of highest stress. By monitoring the tip deflection, changes in the natural frequency and response to a given excitation are correlated to fatigue life. Despite the absence of large-scale cracks, detectable changes in the nonlinear dynamics are discovered. The nonlinear dynamic parameters are estimated capturing the change in the forward and backward nonlinear sine sweeps. These changes could lend themselves to being a trackable damage precursor. The presence of microstructural precursors are confirmed using nanoindentation.",

author = "Haynes, {Robert A.} and Ed Habtour and Henry, {Todd C.} and Cole, {Daniel P.} and Volker Weiss and Antonios Kontsos and Brian Wisner",

note = "Publisher Copyright: {\textcopyright} The Society for Experimental Mechanics, Inc. 2019.; 36th IMAC, A Conference and Exposition on Structural Dynamics, 2018 ; Conference date: 12-02-2018 Through 15-02-2018",

year = "2019",

doi = "10.1007/978-3-319-74280-9_32",

language = "English (US)",

isbn = "9783319742793",

series = "Conference Proceedings of the Society for Experimental Mechanics Series",

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Haynes, RA, Habtour, E, Henry, TC, Cole, DP, Weiss, V, Kontsos, A & Wisner, B 2019, Damage precursor indicator for aluminum 7075-T6 based on nonlinear dynamics. in G Kerschen (ed.), Nonlinear Dynamics - Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018. Conference Proceedings of the Society for Experimental Mechanics Series, vol. 1, Springer Science and Business Media, LLC, pp. 303-313, 36th IMAC, A Conference and Exposition on Structural Dynamics, 2018, Orlando, United States, 2/12/18. https://doi.org/10.1007/978-3-319-74280-9_32

Damage precursor indicator for aluminum 7075-T6 based on nonlinear dynamics. / Haynes, Robert A.; Habtour, Ed; Henry, Todd C. et al.
Nonlinear Dynamics - Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018. ed. / Gaetan Kerschen. Springer Science and Business Media, LLC, 2019. p. 303-313 (Conference Proceedings of the Society for Experimental Mechanics Series; Vol. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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T1 - Damage precursor indicator for aluminum 7075-T6 based on nonlinear dynamics

AU - Haynes, Robert A.

AU - Habtour, Ed

AU - Henry, Todd C.

AU - Cole, Daniel P.

AU - Weiss, Volker

AU - Kontsos, Antonios

AU - Wisner, Brian

PY - 2019

Y1 - 2019

N2 - In this work, a damage precursor indicator for aluminum 7075-T6 is proposed based on the nonlinear dynamics of a cantilevered beam system. A shouldered beam specimen is used to move the region of highest stress away from the clamped end. The beam is subject to harmonic base excitation in a uniaxial shaker. Fatigue damage accumulates in the beam with damage forming most quickly in the region of highest stress. By monitoring the tip deflection, changes in the natural frequency and response to a given excitation are correlated to fatigue life. Despite the absence of large-scale cracks, detectable changes in the nonlinear dynamics are discovered. The nonlinear dynamic parameters are estimated capturing the change in the forward and backward nonlinear sine sweeps. These changes could lend themselves to being a trackable damage precursor. The presence of microstructural precursors are confirmed using nanoindentation.

AB - In this work, a damage precursor indicator for aluminum 7075-T6 is proposed based on the nonlinear dynamics of a cantilevered beam system. A shouldered beam specimen is used to move the region of highest stress away from the clamped end. The beam is subject to harmonic base excitation in a uniaxial shaker. Fatigue damage accumulates in the beam with damage forming most quickly in the region of highest stress. By monitoring the tip deflection, changes in the natural frequency and response to a given excitation are correlated to fatigue life. Despite the absence of large-scale cracks, detectable changes in the nonlinear dynamics are discovered. The nonlinear dynamic parameters are estimated capturing the change in the forward and backward nonlinear sine sweeps. These changes could lend themselves to being a trackable damage precursor. The presence of microstructural precursors are confirmed using nanoindentation.

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ER -

Haynes RA, Habtour E, Henry TC, Cole DP, Weiss V, Kontsos A et al. Damage precursor indicator for aluminum 7075-T6 based on nonlinear dynamics. In Kerschen G, editor, Nonlinear Dynamics - Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018. Springer Science and Business Media, LLC. 2019. p. 303-313. (Conference Proceedings of the Society for Experimental Mechanics Series). doi: 10.1007/978-3-319-74280-9_32

Damage precursor indicator for aluminum 7075-T6 based on nonlinear dynamics

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