6. ConclusionsThis research analyze

6. Conclusions
This research analyzed the shear behavior of double-layer specimens with the same features tested in different
state of stress but in the same deformation rate. The tests were performed on two devices, named SISTM and
SHSTM, designed to reproduce the most common stress/deformation histories found in literature, but suitably
modified to allow the comparison of the results.
The aim was to verify the statistic reliability of both the machines and to investigate the relationship between
the several failure mechanism and the different configurations and state of stress imposed by the devices.
The maximum shear stress, the corresponding normal stress, the displacements, the shape of the curve
load/displacement and the interlayer tangential modulus were evaluated by the tests.
Based on the results, the following conclusions have been achieved: