DELAMINATION BUCKLING IN FOUR-POINT BENDING TESTS – AN EXPERIMENTAL INVESTIGATION

Nicola Dardano

nicola.dardano@imtlucca.it
IMT School for Advanced Studies Lucca (Italy)

Marco Paggi


IMT School for Advanced Studies Lucca (Italy)
https://orcid.org/0000-0001-9409-9782

Stefano Bennati


University of Pisa (Italy)
https://orcid.org/0000-0003-1929-0792

Paolo Sebastiano Valvo


University of Pisa (Italy)
https://orcid.org/0000-0001-6439-1926

Abstract

A set of carbon-fibre laminated specimens have been subjected to (static) four-point bending tests to assess the conditions for delamination induced by local buckling events of the compressed lamina. Testing conditions prescribed by the ASTM D7264/D7264M-1 standard, valid for monolithic samples, have been followed. It is worth noticing that the delaminated area, which is loaded in compression, at a certain point reaches a critical value and snaps upwards. During the experimental campaign, the applied load and the corresponding displacements have been recorded, as well as the length of the crack and the deformation of the delaminated area by using a Digital Image Correlation (DIC) technique.


Keywords:

carbon fibre, four-point bending test, buckling, snapping, delamination, digital image correlation

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Published
2022-11-04

Cited by

Dardano, N., Paggi, M., Bennati, S., & Valvo, P. S. (2022). DELAMINATION BUCKLING IN FOUR-POINT BENDING TESTS – AN EXPERIMENTAL INVESTIGATION. Journal of Technology and Exploitation in Mechanical Engineering, 8(1), 8–14. https://doi.org/10.35784/jteme.3092

Authors

Nicola Dardano 
nicola.dardano@imtlucca.it
IMT School for Advanced Studies Lucca Italy

Authors

Marco Paggi 

IMT School for Advanced Studies Lucca Italy
https://orcid.org/0000-0001-9409-9782

Authors

Stefano Bennati 

University of Pisa Italy
https://orcid.org/0000-0003-1929-0792

Authors

Paolo Sebastiano Valvo 

University of Pisa Italy
https://orcid.org/0000-0001-6439-1926

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