ИСТИНА

http://www.aimeta2019.it/wp-content/uploads/2019/09/Programma-AIMETA_definitivo.pdf Analytical and semi-analytical 2D solutions have been derived for the energy release rate and mode-mixity phase angle of an edge-delamination crack between a thin layer and an infinitely deep substrate [1]. The solutions are based on the derivations in [2-4] The thin layer is subjected to general edge loading: axial and shear forces and bending moment. The solutions are presented in terms of elementary crack tip loads and apply to a wide range of material combinations, with a large mismatch of the elastic constants. Isotropic materials with Dundurs’ parameters and are analyzed in order to in order to describe also stiff layers on soft substrates ( ) and soft layers on stiff substrates ( ), and to account for the mismatch in the volumetric stiffnesses of the layer and substrate ( ).The effects of crack tip shear on the fracture parameters is also accounted for in the solutions.