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

Nicola Dardano; Marco Paggi; Stefano Bennati; Paolo Sebastiano Valvo

doi:10.35784/jteme.3092

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Published: Nov 4, 2022

DOI: https://doi.org/10.35784/jteme.3092

DOI

https://doi.org/10.35784/jteme.3092

Authors

Nicola Dardano

nicola.dardano@imtlucca.it

IMT School for Advanced Studies Lucca

Marco Paggi

marco.paggi@imtlucca.it

IMT School for Advanced Studies Lucca

https://orcid.org/0000-0001-9409-9782

Stefano Bennati

bennati.stefano@gmail.com

University of Pisa

https://orcid.org/0000-0003-1929-0792

Paolo Sebastiano Valvo

p.valvo@ing.unipi.it

University of Pisa

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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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

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