lnvestigation of Patch Coatings lnfluence on the Stress lntensity Factor for Surface Cracks

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

Resumé

In this paper, it is investigated how a surface layer of epoxy glue will affect the crack propagation of a surface crack. The intension is to reduce or even stop the crack propagation by means of patch layer coating. When adding a patch layer to the surface with small cracks, the layer will attempt to damp the free end of the crack, which will reduce the stress intensity factor and subsequently reduce the crack growth. The considered patch consists of a surface layer of 0.2 mm two component adhesive Epoxy, 3M DP 460. The models described in this work contains five different crack sizes with a patch layer on the surface. The stress intensity factor is computed by means of the J-integral and the FE-model is setup with a nonlinear material model to establish the upper boundary for the patch stress capacity. A reduction of the stress intensity factor of approximately 2 % and a reduction of the crack growth of 5.4-6.1 % for crack sizes of 0.5, l and 2 mm is achieved by applying the patch layer. In the analysis, cracks of 3 mm and 5 mm are rejected due to plastic strain in the patch layer, consequently the effect of
the patch layer is insignificant.
OriginalsprogEngelsk
TitelProceedings of the 26th Nordic Seminar on Computational Mechanics : Oslo, 23-25 October 2013
RedaktørerAnders Logg, Kent-Andre Mardal, Andé Massing
Antal sider4
ForlagCenter for Biomedical Computing, Simula Research Laboratory
Publikationsdato2013
Sider210-213
ISBN (Trykt)978-82-92593-12-7
StatusUdgivet - 2013
BegivenhedThe 26th Nordic Seminar on Computational Mechanics - Oslo, Norge
Varighed: 23 okt. 201325 okt. 2013
Konferencens nummer: 26

Konference

KonferenceThe 26th Nordic Seminar on Computational Mechanics
Nummer26
LandNorge
ByOslo
Periode23/10/201325/10/2013

Fingerprint

Cracks
Coatings
Crack propagation
Stress intensity factors
Glues
Plastic deformation
Adhesives

Emneord

  • Patch Repairing
  • Fatigue Life
  • Stress Intensity Factors

Citer dette

Lambertsen, S. H., Jepsen, M. S., & Damkilde, L. (2013). lnvestigation of Patch Coatings lnfluence on the Stress lntensity Factor for Surface Cracks. I A. Logg, K-A. Mardal, & A. Massing (red.), Proceedings of the 26th Nordic Seminar on Computational Mechanics: Oslo, 23-25 October 2013 (s. 210-213). Center for Biomedical Computing, Simula Research Laboratory.
Lambertsen, Søren Heide ; Jepsen, Michael S. ; Damkilde, Lars. / lnvestigation of Patch Coatings lnfluence on the Stress lntensity Factor for Surface Cracks. Proceedings of the 26th Nordic Seminar on Computational Mechanics: Oslo, 23-25 October 2013. red. / Anders Logg ; Kent-Andre Mardal ; Andé Massing. Center for Biomedical Computing, Simula Research Laboratory, 2013. s. 210-213
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title = "lnvestigation of Patch Coatings lnfluence on the Stress lntensity Factor for Surface Cracks",
abstract = "In this paper, it is investigated how a surface layer of epoxy glue will affect the crack propagation of a surface crack. The intension is to reduce or even stop the crack propagation by means of patch layer coating. When adding a patch layer to the surface with small cracks, the layer will attempt to damp the free end of the crack, which will reduce the stress intensity factor and subsequently reduce the crack growth. The considered patch consists of a surface layer of 0.2 mm two component adhesive Epoxy, 3M DP 460. The models described in this work contains five different crack sizes with a patch layer on the surface. The stress intensity factor is computed by means of the J-integral and the FE-model is setup with a nonlinear material model to establish the upper boundary for the patch stress capacity. A reduction of the stress intensity factor of approximately 2 {\%} and a reduction of the crack growth of 5.4-6.1 {\%} for crack sizes of 0.5, l and 2 mm is achieved by applying the patch layer. In the analysis, cracks of 3 mm and 5 mm are rejected due to plastic strain in the patch layer, consequently the effect ofthe patch layer is insignificant.",
keywords = "Patch Repairing, Fatigue Life, Stress Intensity Factors, Patch Repairing, Fatigue Life, Stress Intensity Factors",
author = "Lambertsen, {S{\o}ren Heide} and Jepsen, {Michael S.} and Lars Damkilde",
year = "2013",
language = "English",
isbn = "978-82-92593-12-7",
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Lambertsen, SH, Jepsen, MS & Damkilde, L 2013, lnvestigation of Patch Coatings lnfluence on the Stress lntensity Factor for Surface Cracks. i A Logg, K-A Mardal & A Massing (red), Proceedings of the 26th Nordic Seminar on Computational Mechanics: Oslo, 23-25 October 2013. Center for Biomedical Computing, Simula Research Laboratory, s. 210-213, The 26th Nordic Seminar on Computational Mechanics, Oslo, Norge, 23/10/2013.

lnvestigation of Patch Coatings lnfluence on the Stress lntensity Factor for Surface Cracks. / Lambertsen, Søren Heide; Jepsen, Michael S.; Damkilde, Lars.

Proceedings of the 26th Nordic Seminar on Computational Mechanics: Oslo, 23-25 October 2013. red. / Anders Logg; Kent-Andre Mardal; Andé Massing. Center for Biomedical Computing, Simula Research Laboratory, 2013. s. 210-213.

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

TY - GEN

T1 - lnvestigation of Patch Coatings lnfluence on the Stress lntensity Factor for Surface Cracks

AU - Lambertsen, Søren Heide

AU - Jepsen, Michael S.

AU - Damkilde, Lars

PY - 2013

Y1 - 2013

N2 - In this paper, it is investigated how a surface layer of epoxy glue will affect the crack propagation of a surface crack. The intension is to reduce or even stop the crack propagation by means of patch layer coating. When adding a patch layer to the surface with small cracks, the layer will attempt to damp the free end of the crack, which will reduce the stress intensity factor and subsequently reduce the crack growth. The considered patch consists of a surface layer of 0.2 mm two component adhesive Epoxy, 3M DP 460. The models described in this work contains five different crack sizes with a patch layer on the surface. The stress intensity factor is computed by means of the J-integral and the FE-model is setup with a nonlinear material model to establish the upper boundary for the patch stress capacity. A reduction of the stress intensity factor of approximately 2 % and a reduction of the crack growth of 5.4-6.1 % for crack sizes of 0.5, l and 2 mm is achieved by applying the patch layer. In the analysis, cracks of 3 mm and 5 mm are rejected due to plastic strain in the patch layer, consequently the effect ofthe patch layer is insignificant.

AB - In this paper, it is investigated how a surface layer of epoxy glue will affect the crack propagation of a surface crack. The intension is to reduce or even stop the crack propagation by means of patch layer coating. When adding a patch layer to the surface with small cracks, the layer will attempt to damp the free end of the crack, which will reduce the stress intensity factor and subsequently reduce the crack growth. The considered patch consists of a surface layer of 0.2 mm two component adhesive Epoxy, 3M DP 460. The models described in this work contains five different crack sizes with a patch layer on the surface. The stress intensity factor is computed by means of the J-integral and the FE-model is setup with a nonlinear material model to establish the upper boundary for the patch stress capacity. A reduction of the stress intensity factor of approximately 2 % and a reduction of the crack growth of 5.4-6.1 % for crack sizes of 0.5, l and 2 mm is achieved by applying the patch layer. In the analysis, cracks of 3 mm and 5 mm are rejected due to plastic strain in the patch layer, consequently the effect ofthe patch layer is insignificant.

KW - Patch Repairing

KW - Fatigue Life

KW - Stress Intensity Factors

KW - Patch Repairing

KW - Fatigue Life

KW - Stress Intensity Factors

M3 - Article in proceeding

SN - 978-82-92593-12-7

SP - 210

EP - 213

BT - Proceedings of the 26th Nordic Seminar on Computational Mechanics

A2 - Logg, Anders

A2 - Mardal, Kent-Andre

A2 - Massing, Andé

PB - Center for Biomedical Computing, Simula Research Laboratory

ER -

Lambertsen SH, Jepsen MS, Damkilde L. lnvestigation of Patch Coatings lnfluence on the Stress lntensity Factor for Surface Cracks. I Logg A, Mardal K-A, Massing A, red., Proceedings of the 26th Nordic Seminar on Computational Mechanics: Oslo, 23-25 October 2013. Center for Biomedical Computing, Simula Research Laboratory. 2013. s. 210-213