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Failure investigation
of debonded sandwich columns: An experimental and numerical
study
Ramin Moslemian, Christian Berggreen, Leif A. Carlsson and Francis Aviles |
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Vol. 4 (2009), No. 7-8, 1469–1487
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Abstract |
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Failure of compression loaded sandwich columns with an implanted through-width face/core debond is examined. Compression tests were conducted on sandwich columns containing implemented face/core debonds. The strains and out-of-plane displacements of the debonded region were monitored using the digital image correlation technique. Finite element analysis and linear elastic fracture mechanics were employed to predict the critical instability load and compression strength of the columns. Energy release rate and mode mixity were determined and compared to fracture toughness data obtained from TSD (tilted sandwich debond) tests, predicting propagation loads. Instability loads of the columns were determined from the out-of-plane displacements using the Southwell method. The finite element estimates of debond propagation and instability loads are in overall agreement with experimental results. The proximity of the debond propagation loads and the instability loads shows the importance of instability in connection with the debond propagation of sandwich columns. |
Keywords
sandwich structures, columns, debond damages, buckling,
fracture mechanics, compressive strength
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Milestones
Received: 14 April 2009
Revised: 29 May 2009
Accepted: 30 May 2009
Published: 26 December 2009
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Authors |
| Ramin Moslemian | |
| Department of Mechanical
Engineering Technical University of Denmark Nils Koppels Allé, Building 403 2800 Kongens Lyngby Denmark |
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| Christian Berggreen | |
| Department of Mechanical
Engineering Technical University of Denmark Nils Koppels Allé, Building 403 2800 Kongens Lyngby Denmark |
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| Leif A. Carlsson | |
| Department of Mechanical
Engineering Florida Atlantic University 777 Glades Road Boca Raton, FL 33431 United States |
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| Francis Aviles | |
| Centro de Investigación Científica
de Yucatán A.C. Unidad de Materiales Calle 43, No. 103 Colonia Chuburná de Hidalgo CP 97200 Mérida, Yucatán Mexico |
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