A J Integral Approach for Measuring Cohesive Laws Using a Modified DCB Sandwich Specimen

Christian Lundsgaard-Larsen; Christian Berggreen; Bent F. Sørensen

A J Integral Approach for Measuring Cohesive Laws Using a Modified DCB Sandwich Specimen

Christian Lundsgaard-Larsen (Invited author)
, Christian Berggreen (Invited author)
, Bent F. Sørensen (Invited author)

Technical University of Denmark

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

Extraction of cohesive laws are conducted for interfaces in sandwich structures. Separation between face and core are driven by pure bending moments applied to a double cantilever beam (DCB) specimen. By varying the ratio between moments applied to the two beams the test is conducted for different mode mixities. The sandwich specimen consists of glass fiber faces and Divinycell H200 foam core. Arbitrary stiffening of the sandwich specimen with steel bars adhered to the faces reduces rotations and ensures that the method is useable for a wide range of materials. The J integral is employed and the opening of the pre-crack tip is recorded by a commercial digital photogrammetry measurement system. Cohesive laws are extracted by differentiating J with respect to the normal and tangential opening of the pre-crack tip. Some results are presented and discussed.

Original language	English
Title of host publication	Experimental Analysis of Nano and Engineering Materials and Structures : Proceedings of the 13th International Conference on Experimental Mechanics
Editors	E. E. Gdoutos
Number of pages	978
Place of Publication	Dordrecht, The Netherlands
Publisher	Springer
Publication date	2007
ISBN (Print)	978-1-4020-6238-4
Publication status	Published - 2007
Event	13th International Conference on Experimental Mechanics - Alexandroupolis, Greece Duration: 1 Jul 2007 → 6 Jul 2007

Conference

Conference	13th International Conference on Experimental Mechanics
Country/Territory	Greece
City	Alexandroupolis
Period	01/07/2007 → 06/07/2007

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Lundsgaard-Larsen, Christian ; Berggreen, Christian ; Sørensen, Bent F. / A J Integral Approach for Measuring Cohesive Laws Using a Modified DCB Sandwich Specimen. Experimental Analysis of Nano and Engineering Materials and Structures: Proceedings of the 13th International Conference on Experimental Mechanics. editor / E. E. Gdoutos. Dordrecht, The Netherlands : Springer, 2007.

@inproceedings{1d757e4b724142faad5cee03c08029ef,

title = "A J Integral Approach for Measuring Cohesive Laws Using a Modified DCB Sandwich Specimen",

abstract = "Extraction of cohesive laws are conducted for interfaces in sandwich structures. Separation between face and core are driven by pure bending moments applied to a double cantilever beam (DCB) specimen. By varying the ratio between moments applied to the two beams the test is conducted for different mode mixities. The sandwich specimen consists of glass fiber faces and Divinycell H200 foam core. Arbitrary stiffening of the sandwich specimen with steel bars adhered to the faces reduces rotations and ensures that the method is useable for a wide range of materials. The J integral is employed and the opening of the pre-crack tip is recorded by a commercial digital photogrammetry measurement system. Cohesive laws are extracted by differentiating J with respect to the normal and tangential opening of the pre-crack tip. Some results are presented and discussed.",

author = "Christian Lundsgaard-Larsen and Christian Berggreen and S{\o}rensen, \{Bent F.\}",

year = "2007",

language = "English",

isbn = "978-1-4020-6238-4",

editor = "Gdoutos, \{E. E.\}",

booktitle = "Experimental Analysis of Nano and Engineering Materials and Structures",

publisher = "Springer",

note = "13th International Conference on Experimental Mechanics ; Conference date: 01-07-2007 Through 06-07-2007",

}

Lundsgaard-Larsen, C, Berggreen, C & Sørensen, BF 2007, A J Integral Approach for Measuring Cohesive Laws Using a Modified DCB Sandwich Specimen. in EE Gdoutos (ed.), Experimental Analysis of Nano and Engineering Materials and Structures: Proceedings of the 13th International Conference on Experimental Mechanics. Springer, Dordrecht, The Netherlands, 13th International Conference on Experimental Mechanics, Alexandroupolis, Greece, 01/07/2007.

A J Integral Approach for Measuring Cohesive Laws Using a Modified DCB Sandwich Specimen. / Lundsgaard-Larsen, Christian (Invited author); Berggreen, Christian (Invited author); Sørensen, Bent F. (Invited author).
Experimental Analysis of Nano and Engineering Materials and Structures: Proceedings of the 13th International Conference on Experimental Mechanics. ed. / E. E. Gdoutos. Dordrecht, The Netherlands: Springer, 2007.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

TY - GEN

T1 - A J Integral Approach for Measuring Cohesive Laws Using a Modified DCB Sandwich Specimen

AU - Lundsgaard-Larsen, Christian

AU - Berggreen, Christian

AU - Sørensen, Bent F.

PY - 2007

Y1 - 2007

N2 - Extraction of cohesive laws are conducted for interfaces in sandwich structures. Separation between face and core are driven by pure bending moments applied to a double cantilever beam (DCB) specimen. By varying the ratio between moments applied to the two beams the test is conducted for different mode mixities. The sandwich specimen consists of glass fiber faces and Divinycell H200 foam core. Arbitrary stiffening of the sandwich specimen with steel bars adhered to the faces reduces rotations and ensures that the method is useable for a wide range of materials. The J integral is employed and the opening of the pre-crack tip is recorded by a commercial digital photogrammetry measurement system. Cohesive laws are extracted by differentiating J with respect to the normal and tangential opening of the pre-crack tip. Some results are presented and discussed.

AB - Extraction of cohesive laws are conducted for interfaces in sandwich structures. Separation between face and core are driven by pure bending moments applied to a double cantilever beam (DCB) specimen. By varying the ratio between moments applied to the two beams the test is conducted for different mode mixities. The sandwich specimen consists of glass fiber faces and Divinycell H200 foam core. Arbitrary stiffening of the sandwich specimen with steel bars adhered to the faces reduces rotations and ensures that the method is useable for a wide range of materials. The J integral is employed and the opening of the pre-crack tip is recorded by a commercial digital photogrammetry measurement system. Cohesive laws are extracted by differentiating J with respect to the normal and tangential opening of the pre-crack tip. Some results are presented and discussed.

M3 - Article in proceedings

SN - 978-1-4020-6238-4

BT - Experimental Analysis of Nano and Engineering Materials and Structures

A2 - Gdoutos, E. E.

PB - Springer

CY - Dordrecht, The Netherlands

T2 - 13th International Conference on Experimental Mechanics

Y2 - 1 July 2007 through 6 July 2007

ER -

A J Integral Approach for Measuring Cohesive Laws Using a Modified DCB Sandwich Specimen

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