Modelling the double cantilever beam test with bending moments by using bilinear discontinuous cohesive laws

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Abstract

A theoretical model of the double cantilever beam tests with bending moments (DCB-UBM) is presented. The specimen is modelled as the assemblage of two laminated beams connected by a cohesive interface. It is assumed that the traction-separation laws – i.e. the relationships between the interfacial stresses and relative displacements – are described by bilinear discontinuous functions. An analytical solution for pure modes I and II is determined by solving the related differential problem. Furthermore, analysis based on the path-independent J integral is carried out. Formulas are given to determine the cohesive law parameters from experiments. Experimental tests have been conducted on glass fibre reinforced specimens under pure mode I and II loading conditions. The predictions of the theoretical model turn out to be in very good agreement with the experimental results.
Original languageEnglish
Title of host publicationProceedings of the 20th International Conference on Composite Materials
Number of pages11
PublisherICCM20 Secretariat
Publication date2015
Publication statusPublished - 2015
Event20th International Conference on Composite Materials (ICCM20) - Copenhagen, Denmark
Duration: 19 Jul 201524 Jul 2015
Conference number: 20

Conference

Conference20th International Conference on Composite Materials (ICCM20)
Number20
CountryDenmark
CityCopenhagen
Period19/07/201524/07/2015

Keywords

  • Composite delamination
  • Cohesive law
  • Double cantilever beam test
  • Analytical solution
  • Experimental testing

Cite this

Valvo, P. S., Sørensen, B. F., & Toftegaard, H. L. (2015). Modelling the double cantilever beam test with bending moments by using bilinear discontinuous cohesive laws. In Proceedings of the 20th International Conference on Composite Materials ICCM20 Secretariat.