Failure by design of confined architected interfaces

In this work, we investigate the mechanical properties of conceptual adhesive joints, in which the role of the adhesive is played by an architected interface joining two plates. We present a homogenisation procedure showcasing characteristic lengths that govern the mode I fracture behaviour of architected interfaces. Hence, we augment existing theoretical frameworks providing increased accuracy and accounting for micromechanical effects. Thereafter, we model the interaction between homogenization lengths and characteristic fracture process zone lengths. The findings are compared against numerical simulations justifying the effectiveness of the method. The theoretical and numerical approaches are inter-winded, revealing a set of critical parameters that needs to be considered when designing architected interfaces subjected to failure.