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.
|Title of host publication||Proceedings of the 20th International Conference on Composite Materials|
|Number of pages||11|
|Publication status||Published - 2015|
|Event||20th International Conference on Composite Materials (ICCM20) - Copenhagen, Denmark|
Duration: 19 Jul 2015 → 24 Jul 2015
Conference number: 20
|Conference||20th International Conference on Composite Materials (ICCM20)|
|Period||19/07/2015 → 24/07/2015|
- Composite delamination
- Cohesive law
- Double cantilever beam test
- Analytical solution
- Experimental testing
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.