Experimental method for the determination of material parameters of plasticity models for toughened adhesives

In order to minimize the amount of tests required, the present work is focused on the definition of a sequential/multiaxial test that can be carried out using a single sample giving enough information to completely determine the mentioned parameters. More concretely, the experimental procedure proposed involves torsion and tensile tests that are executed consecutively. The design of the test has been carried out using the finite element method as calculation tool and considering the exponent Drucker-Prager model. The verification of the experimental procedure proposed has been carried out for a toughened epoxy adhesive that has been characterized through conventional tensile and torsion tests in previous works.