Dual-actuator mixed-mode bending tests on adhesive joints of different thickness

In this work, fracture mechanics test results on adhesive joints of different thicknesses in mixed mode I+II are presented. While established test setups commonly apply constant mode-mixity and therefore provide a single data point of the fracture envelope, dual-actuator mixed-mode bending tests are intended to determine the entire fracture envelope in a single test. This circumstance significantly reduces the number of experiments required to obtain a fracture envelope with many support points. A modification of the experimental setup enables a Single-Leg Bending (SLB) configuration and thus opens up the possibility of a comparison with reference measurements from the literature.