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

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

6 Citations (Scopus)

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
Title of host publication	Nonlinear Dynamics
Subtitle of host publication	Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018
Editors	Gaetan Kerschen
Place of Publication	Cham
Publisher	Springer
Pages	303-313
Number of pages	11
Volume	1
ISBN (Electronic)	978-3-319-74280-9
ISBN (Print)	978-3-319-74279-3
DOIs	https://doi.org/10.1007/978-3-319-74280-9_32
Publication status	Published - 2019
Externally published	Yes
Event	36th Conference and Exposition on Structural Dynamics, IMAC 2018 - Orlando, United States Duration: 12 Feb 2018 → 15 Feb 2018 Conference number: 36 https://www.tsnn.com/events/imacxxxvi-conference-exposition-structural-dynamics

Publication series

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

Conference

Conference	36th Conference and Exposition on Structural Dynamics, IMAC 2018
Abbreviated title	IMAC
Country/Territory	United States
City	Orlando
Period	12/02/18 → 15/02/18
Internet address	https://www.tsnn.com/events/imacxxxvi-conference-exposition-structural-dynamics

Keywords

Fatigue damage precursors
Micromechanics
Nonlinear dynamics
Structural health monitoring
Vibration

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 (Vol. 1, pp. 303-313). (Conference Proceedings of the Society for Experimental Mechanics Series). Springer. 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. Vol. 1 Cham : Springer, 2019. pp. 303-313 (Conference Proceedings of the Society for Experimental Mechanics Series).

@inproceedings{34fe131018774459aef7e5fd52504463,

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.",

keywords = "Fatigue damage precursors, Micromechanics, Nonlinear dynamics, Structural health monitoring, Vibration",

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

year = "2019",

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

language = "English",

isbn = "978-3-319-74279-3",

volume = "1",

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

publisher = "Springer",

pages = "303--313",

editor = "Gaetan Kerschen",

booktitle = "Nonlinear Dynamics",

address = "Germany",

note = "36th Conference and Exposition on Structural Dynamics, IMAC 2018, IMAC ; Conference date: 12-02-2018 Through 15-02-2018",

url = "https://www.tsnn.com/events/imacxxxvi-conference-exposition-structural-dynamics",

}

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. vol. 1, Conference Proceedings of the Society for Experimental Mechanics Series, Springer, Cham, pp. 303-313, 36th Conference and Exposition on Structural Dynamics, IMAC 2018, Orlando, Florida, United States, 12/02/18. 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. Vol. 1 Cham: Springer, 2019. p. 303-313 (Conference Proceedings of the Society for Experimental Mechanics Series).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

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

N1 - Conference code: 36

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.

KW - Fatigue damage precursors

KW - Micromechanics

KW - Nonlinear dynamics

KW - Structural health monitoring

KW - Vibration

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U2 - 10.1007/978-3-319-74280-9_32

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

M3 - Conference contribution

SN - 978-3-319-74279-3

VL - 1

T3 - Conference Proceedings of the Society for Experimental Mechanics Series

SP - 303

EP - 313

BT - Nonlinear Dynamics

A2 - Kerschen, Gaetan

PB - Springer

CY - Cham

T2 - 36th Conference and Exposition on Structural Dynamics, IMAC 2018

Y2 - 12 February 2018 through 15 February 2018

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. Vol. 1. Cham: Springer. 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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