A Modified TSD Specimen for Fracture Toughness Characterization – Fracture Mechanics Analysis and Design

Christian Berggreen; Leif A. Carlsson

doi:10.1177/0021998309360937

A Modified TSD Specimen for Fracture Toughness Characterization – Fracture Mechanics Analysis and Design

Christian Berggreen, Leif A. Carlsson

Florida Atlantic University

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Abstract

The tilted sandwich debond (TSD) specimen has been recognized as a viable candidate for characterization of the face/core fracture resistance. Analysis, however, shows that the range of phase angles that can be realized by altering the tilt angle and other parameters of the test is quite limited. A method to extend the range of mode-mixities of the TSD specimen is to introduce a larger amount of transverse shear by reinforcing the loaded upper face with a stiff metal plate. Analysis shows that this method extends the range of phase angles to a practically useful range. Guidelines on selection of thicknesses of the reinforcement, and design considerations for further modifications are provided.

Original language	English
Journal	Journal of Composite Materials
Volume	44
Issue number	15
Pages (from-to)	1893-1912
ISSN	0021-9983
DOIs	https://doi.org/10.1177/0021998309360937
Publication status	Published - 2010

Keywords

Fracture mechanics
Interfaces
Mxed mode loading
Sandwich structures

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http://jcm.sagepub.com/content/44/15/1893

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abstract = "The tilted sandwich debond (TSD) specimen has been recognized as a viable candidate for characterization of the face/core fracture resistance. Analysis, however, shows that the range of phase angles that can be realized by altering the tilt angle and other parameters of the test is quite limited. A method to extend the range of mode-mixities of the TSD specimen is to introduce a larger amount of transverse shear by reinforcing the loaded upper face with a stiff metal plate. Analysis shows that this method extends the range of phase angles to a practically useful range. Guidelines on selection of thicknesses of the reinforcement, and design considerations for further modifications are provided.",

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N2 - The tilted sandwich debond (TSD) specimen has been recognized as a viable candidate for characterization of the face/core fracture resistance. Analysis, however, shows that the range of phase angles that can be realized by altering the tilt angle and other parameters of the test is quite limited. A method to extend the range of mode-mixities of the TSD specimen is to introduce a larger amount of transverse shear by reinforcing the loaded upper face with a stiff metal plate. Analysis shows that this method extends the range of phase angles to a practically useful range. Guidelines on selection of thicknesses of the reinforcement, and design considerations for further modifications are provided.

AB - The tilted sandwich debond (TSD) specimen has been recognized as a viable candidate for characterization of the face/core fracture resistance. Analysis, however, shows that the range of phase angles that can be realized by altering the tilt angle and other parameters of the test is quite limited. A method to extend the range of mode-mixities of the TSD specimen is to introduce a larger amount of transverse shear by reinforcing the loaded upper face with a stiff metal plate. Analysis shows that this method extends the range of phase angles to a practically useful range. Guidelines on selection of thicknesses of the reinforcement, and design considerations for further modifications are provided.

KW - Fracture mechanics

KW - Interfaces

KW - Mxed mode loading

KW - Sandwich structures

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ER -

A Modified TSD Specimen for Fracture Toughness Characterization – Fracture Mechanics Analysis and Design

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