Fracture Diodes: Directional asymmetry of fracture toughness

Neal Brodnik, Stella Brach, Chris Long, Guruswami (Ravi) Ravichandran, Blaise Bourdin, Katherine Faber & Kaushik Bhattacharya
Toughness describes the ability of a material to resist fracture or crack propagation. It is demonstrated here that fracture toughness of a material can be asymmetric, i.e., the resistance of a medium to a crack propagating from right to left can be significantly different from that to a crack propagating from left to right. Such asymmetry is unknown in natural materials, but can be built into artificial materials through the proper control of microstructure. This...
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