Towards real time crack monitoring using image correlation

P. López-Crespo; A. Shterenlikht; E. A. Patterson; J. R. Yates; P. J. Withers; R. Burguete

Towards real time crack monitoring using image correlation

P. López-Crespo^*
, A. Shterenlikht
, E. A. Patterson
, J. R. Yates
, P. J. Withers
, R. Burguete

^*Corresponding author for this work

Solid Mechanics

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

6 Citations (Scopus)

Abstract

In this work low frequency cyclic loading was applied to a fatigue pre-cracked wedge opening loaded (WOL) sample. The resulting in-plane displacement fields were measured using a 2D image correlation method. Muskhelishvili's complex function approach was used to represent the displacements and thereby obtain the stress intensity factors (SIFs) directly without differentiation to give strain. The SIFs were monitored throughout 3 loading cycles. Overall the inferred SIFs agree well with the nominal applied values. The biggest difference of approximately 10% was observed when the nominal SIFs were close to the fracture toughness. Thus the difference may arise from the effects of the crack tip plasticity. We hope to extended this technique to real time fatigue crack monitoring in the future.

Original language	English
Title of host publication	Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006
Pages	2006-2013
Number of pages	8
Volume	4
Publication status	Published - 31 Oct 2006
Event	SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006 - Saint Louis, MO, United States Duration: 4 Jun 2006 → 7 Jun 2006

Conference

Conference	SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006
Country/Territory	United States
City	Saint Louis, MO
Period	4/06/06 → 7/06/06

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@inproceedings{3893b30a311149eb94998d09d15fee89,

title = "Towards real time crack monitoring using image correlation",

abstract = "In this work low frequency cyclic loading was applied to a fatigue pre-cracked wedge opening loaded (WOL) sample. The resulting in-plane displacement fields were measured using a 2D image correlation method. Muskhelishvili's complex function approach was used to represent the displacements and thereby obtain the stress intensity factors (SIFs) directly without differentiation to give strain. The SIFs were monitored throughout 3 loading cycles. Overall the inferred SIFs agree well with the nominal applied values. The biggest difference of approximately 10\% was observed when the nominal SIFs were close to the fracture toughness. Thus the difference may arise from the effects of the crack tip plasticity. We hope to extended this technique to real time fatigue crack monitoring in the future.",

author = "P. L{\'o}pez-Crespo and A. Shterenlikht and Patterson, \{E. A.\} and Yates, \{J. R.\} and Withers, \{P. J.\} and R. Burguete",

year = "2006",

month = oct,

day = "31",

language = "English",

isbn = "091205395X",

volume = "4",

pages = "2006--2013",

booktitle = "Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006",

note = "SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006 ; Conference date: 04-06-2006 Through 07-06-2006",

}

López-Crespo, P, Shterenlikht, A, Patterson, EA, Yates, JR, Withers, PJ & Burguete, R 2006, Towards real time crack monitoring using image correlation. in Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006. vol. 4, pp. 2006-2013, SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006, Saint Louis, MO, United States, 4/06/06.

TY - GEN

T1 - Towards real time crack monitoring using image correlation

AU - López-Crespo, P.

AU - Shterenlikht, A.

AU - Patterson, E. A.

AU - Yates, J. R.

AU - Withers, P. J.

AU - Burguete, R.

PY - 2006/10/31

Y1 - 2006/10/31

N2 - In this work low frequency cyclic loading was applied to a fatigue pre-cracked wedge opening loaded (WOL) sample. The resulting in-plane displacement fields were measured using a 2D image correlation method. Muskhelishvili's complex function approach was used to represent the displacements and thereby obtain the stress intensity factors (SIFs) directly without differentiation to give strain. The SIFs were monitored throughout 3 loading cycles. Overall the inferred SIFs agree well with the nominal applied values. The biggest difference of approximately 10% was observed when the nominal SIFs were close to the fracture toughness. Thus the difference may arise from the effects of the crack tip plasticity. We hope to extended this technique to real time fatigue crack monitoring in the future.

AB - In this work low frequency cyclic loading was applied to a fatigue pre-cracked wedge opening loaded (WOL) sample. The resulting in-plane displacement fields were measured using a 2D image correlation method. Muskhelishvili's complex function approach was used to represent the displacements and thereby obtain the stress intensity factors (SIFs) directly without differentiation to give strain. The SIFs were monitored throughout 3 loading cycles. Overall the inferred SIFs agree well with the nominal applied values. The biggest difference of approximately 10% was observed when the nominal SIFs were close to the fracture toughness. Thus the difference may arise from the effects of the crack tip plasticity. We hope to extended this technique to real time fatigue crack monitoring in the future.

UR - https://www.scopus.com/pages/publications/33750293935

M3 - Conference Contribution (Conference Proceeding)

AN - SCOPUS:33750293935

SN - 091205395X

SN - 9780912053950

VL - 4

SP - 2006

EP - 2013

BT - Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006

T2 - SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006

Y2 - 4 June 2006 through 7 June 2006

ER -

Towards real time crack monitoring using image correlation

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