Acoustic emission based fatigue failure criterion for CFRP

Runar Unnthorsson; Thomas P. Runarsson; Magnus T. Jonsson

doi:10.1016/j.ijfatigue.2007.02.024

Acoustic emission based fatigue failure criterion for CFRP

Iðnaðarverkfræði-, vélaverkfræði- og tölvunarfræðideild

Háskóli Íslands

Rannsóknarafurð: Framlag til fræðitímarits › Grein › ritrýni

Útdráttur

The aim of the study presented here was to determine whether an acoustic emission (AE) based failure criterion could be designed for determining the failure of an assembled commercial CFRP product during cyclic testing. The failure was defined by a stiffness based criterion. A total of 75 products were cyclic tested and AE measurements made at regular intervals. Presented is an AE based failure criterion equivalent to the stiffness based criterion. This is accomplished for a complex shaped composite under multi-axial loading conditions. The criterion determines a failure when the value of a parameter being monitored exceeds a specified threshold. The parameter used is a function of the number of AE hits in each measurement. Instead of filtering out AE hits from damage growth, the failure criterion is based on AE hits from both cumulative damage and damage growth. The results show that the AE technique can be applied in a realistic setting where AE from cumulative damage greatly outnumber AE related with damage growth.

Upprunalegt tungumál	Enska
Síður (frá-til)	11-20
Síðufjöldi	10
Fræðitímarit	International Journal of Fatigue
Bindi	30
Númer tölublaðs	1
DOI	https://doi.org/10.1016/j.ijfatigue.2007.02.024
Útgáfustaða	Útgefið - jan. 2008

Athugasemd

Funding Information: The authors gratefully acknowledge Össur hf. for providing test specimens and access to their testing facilities. The work of the first author was supported by grants from The RANNIS Research Fund, the Icelandic Research Fund for Graduate Students, and the University of Iceland Research Fund.

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10.1016/j.ijfatigue.2007.02.024

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title = "Acoustic emission based fatigue failure criterion for CFRP",

abstract = "The aim of the study presented here was to determine whether an acoustic emission (AE) based failure criterion could be designed for determining the failure of an assembled commercial CFRP product during cyclic testing. The failure was defined by a stiffness based criterion. A total of 75 products were cyclic tested and AE measurements made at regular intervals. Presented is an AE based failure criterion equivalent to the stiffness based criterion. This is accomplished for a complex shaped composite under multi-axial loading conditions. The criterion determines a failure when the value of a parameter being monitored exceeds a specified threshold. The parameter used is a function of the number of AE hits in each measurement. Instead of filtering out AE hits from damage growth, the failure criterion is based on AE hits from both cumulative damage and damage growth. The results show that the AE technique can be applied in a realistic setting where AE from cumulative damage greatly outnumber AE related with damage growth.",

keywords = "Acoustic emission, Carbon fibre, Fatigue, Fatigue criterion, Stiffness",

author = "Runar Unnthorsson and Runarsson, \{Thomas P.\} and Jonsson, \{Magnus T.\}",

note = "Funding Information: The authors gratefully acknowledge {\"O}ssur hf. for providing test specimens and access to their testing facilities. The work of the first author was supported by grants from The RANNIS Research Fund, the Icelandic Research Fund for Graduate Students, and the University of Iceland Research Fund.",

year = "2008",

month = jan,

doi = "10.1016/j.ijfatigue.2007.02.024",

language = "English",

volume = "30",

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journal = "International Journal of Fatigue",

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AU - Unnthorsson, Runar

AU - Runarsson, Thomas P.

AU - Jonsson, Magnus T.

N1 - Funding Information: The authors gratefully acknowledge Össur hf. for providing test specimens and access to their testing facilities. The work of the first author was supported by grants from The RANNIS Research Fund, the Icelandic Research Fund for Graduate Students, and the University of Iceland Research Fund.

PY - 2008/1

Y1 - 2008/1

N2 - The aim of the study presented here was to determine whether an acoustic emission (AE) based failure criterion could be designed for determining the failure of an assembled commercial CFRP product during cyclic testing. The failure was defined by a stiffness based criterion. A total of 75 products were cyclic tested and AE measurements made at regular intervals. Presented is an AE based failure criterion equivalent to the stiffness based criterion. This is accomplished for a complex shaped composite under multi-axial loading conditions. The criterion determines a failure when the value of a parameter being monitored exceeds a specified threshold. The parameter used is a function of the number of AE hits in each measurement. Instead of filtering out AE hits from damage growth, the failure criterion is based on AE hits from both cumulative damage and damage growth. The results show that the AE technique can be applied in a realistic setting where AE from cumulative damage greatly outnumber AE related with damage growth.

AB - The aim of the study presented here was to determine whether an acoustic emission (AE) based failure criterion could be designed for determining the failure of an assembled commercial CFRP product during cyclic testing. The failure was defined by a stiffness based criterion. A total of 75 products were cyclic tested and AE measurements made at regular intervals. Presented is an AE based failure criterion equivalent to the stiffness based criterion. This is accomplished for a complex shaped composite under multi-axial loading conditions. The criterion determines a failure when the value of a parameter being monitored exceeds a specified threshold. The parameter used is a function of the number of AE hits in each measurement. Instead of filtering out AE hits from damage growth, the failure criterion is based on AE hits from both cumulative damage and damage growth. The results show that the AE technique can be applied in a realistic setting where AE from cumulative damage greatly outnumber AE related with damage growth.

KW - Acoustic emission

KW - Carbon fibre

KW - Fatigue

KW - Fatigue criterion

KW - Stiffness

UR - https://www.scopus.com/pages/publications/35549001839

U2 - 10.1016/j.ijfatigue.2007.02.024

DO - 10.1016/j.ijfatigue.2007.02.024

M3 - Article

SN - 0142-1123

VL - 30

SP - 11

EP - 20

JO - International Journal of Fatigue

JF - International Journal of Fatigue

IS - 1

ER -

Acoustic emission based fatigue failure criterion for CFRP

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