Analysis of DCB test of angle-ply laminates including bending-twisting coupling

Interlaminar fracture of angle-ply symmetric and anti-symmetric laminates by means of the Double Cantilever Beam test has been analyzed. As the cracked arms are symmetric in both cases, bending-twisting coupling occurs. Nevertheless, the effect of that coupling is different in symmetric and anti-sym...

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Bibliographic Details
Published in:Composite structures 2018-04, Vol.190, p.169-178
Main Authors: De Gracia, J., Boyano, A., Arrese, A., Mujika, F.
Format: Article
Language:English
Subjects:
Coupling effects
Delamination
Double Cantilever Beam
Multidirectional
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Summary:Interlaminar fracture of angle-ply symmetric and anti-symmetric laminates by means of the Double Cantilever Beam test has been analyzed. As the cracked arms are symmetric in both cases, bending-twisting coupling occurs. Nevertheless, the effect of that coupling is different in symmetric and anti-symmetric cases. In symmetric cases, it induces a non-uniform aperture of the arms associated to mode I. In anti-symmetric cases, the effect is a sliding of both arms associated to mode III. The analytic approach of the energy release rate includes those coupling effects. Besides the present approach, experimental results are reduced with a previous approach that does not include coupling effects and with the area method.
ISSN:0263-8223
1879-1085
DOI:10.1016/j.compstruct.2018.02.021