EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

Combining high stiffness, strength and toughness is usually not obtained in engineering materials. This can however be achieved with bio-inspired ceramics mainly consisting for instance of alumina platelets [1]. The fracture behavior of such materials is mainly driven by their interfaces, which could possibly be tailored in order to improve the mechanical properties of the material. The design of such materials offers many possibilities; therefore, their microstructure optimization requires tools able to predict their failure. It is thus essential to be able to identify their mechanical properties and especially the interface strength and toughness. The present paper aims at presenting an approach for interface strength and toughness identification from micro-cantilever and macro-SENB tests performed on bio-inspired ceramics. It is based on inverse identification method and Finite Element modeling of the interface fracture.

[1] Bouville F., Maire E., Meille S., Van De Moortèle B., Stevenson A.J., Deville S. Strong, tough and stiff bioinspired ceramics from brittle constituents. Nature Materials 2014, doi: 10.1038/NMAT3915.