Fatigue & Fracture of Engineering Materials & Structures

Face/core interface fracture characterization of mixed mode bending sandwich specimens

Correction(s) for this article

A. QUISPITUPA

Department of Mechanical Engineering, Technical University of Denmark, Nils Koppels Allé, Building 403, DK-2800 Kgs. Lyngby, Denmark

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C. BERGGREEN,

C. BERGGREEN

Department of Mechanical Engineering, Technical University of Denmark, Nils Koppels Allé, Building 403, DK-2800 Kgs. Lyngby, Denmark

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L. A. CARLSSON,

L. A. CARLSSON

Department of Ocean and Mechanical Engineering, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA

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A. QUISPITUPA,

A. QUISPITUPA

Department of Mechanical Engineering, Technical University of Denmark, Nils Koppels Allé, Building 403, DK-2800 Kgs. Lyngby, Denmark

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C. BERGGREEN,

C. BERGGREEN

Department of Mechanical Engineering, Technical University of Denmark, Nils Koppels Allé, Building 403, DK-2800 Kgs. Lyngby, Denmark

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L. A. CARLSSON,

L. A. CARLSSON

Department of Ocean and Mechanical Engineering, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA

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First published: 25 March 2011

https://doi.org/10.1111/j.1460-2695.2011.01551.x

Citations: 22

A. Quispitupa. E-mail: [email protected]

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ABSTRACT

Debonding of the core from the face sheets is a critical failure mode in sandwich structures. This paper presents an experimental study on face/core debond fracture of foam core sandwich specimens under a wide range of mixed mode loading conditions. Sandwich beams with E-glass fibre face sheets and PVC H45, H100 and H250 foam core materials were evaluated. A methodology to perform precracking on fracture specimens in order to achieve a sharp and representative crack front is outlined. The mixed mode loading was controlled in the mixed mode bending (MMB) test rig by changing the loading application point (lever arm distance). Finite element analysis was performed to determine the mode-mixity at the crack tip. The results showed that the face/core interface fracture toughness increased with increased mode II loading. Post failure analysis of the fractured specimens revealed that the crack path depends on the mode-mixity at the crack tip, face sheet properties and core density.

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Volume34, Issue11

November 2011

Pages 839-853

Face/core interface fracture characterization of mixed mode bending sandwich specimens

Correction(s) for this article

Amendment of article “Face/core interface fracture characterization of mixed mode bending specimens”, A. Quispitupa, C. Berggreen, L.A. Carlsson, published in Fatigue & Fracture of Engineering Materials & Structures, 34. 2011, 839–853

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Face/core interface fracture characterization of mixed mode bending sandwich specimens

Correction(s) for this article

Amendment of article “Face/core interface fracture characterization of mixed mode bending specimens”, A. Quispitupa, C. Berggreen, L.A. Carlsson, published in Fatigue & Fracture of Engineering Materials & Structures, 34. 2011, 839–853

ABSTRACT

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