Analysis of DCB test of angle-ply laminates including bending-twisting coupling. (15th April 2018)

• Record Type: Journal Article
• Authors: De Gracia, J.; Boyano, A.; Arrese, A.; Mujika, F.
• Is Part Of: Composite structures. Volume 190(2018)
• Page Start: 169
• Page End: 178
• Publication Date: 2018-04-15
• Subjects: Delamination -- Double Cantilever Beam -- Multidirectional -- Coupling effects; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2018.02.021
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: 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.