Discontinuous fibrous Bouligand architecture enabling formidable fracture resistance with crack orientation insensitivity.

ABSTRACT: Bioinspired architectural design for composites with much higher fracture resistance than that of individual constituent remains a major challenge for engineers and scientists. Inspired by the survival war between the mantis shrimps and abalones, we design a discontinuous fibrous Bouligand (DFB) architecture, a combination of Bouligand and nacreous staggered structures. Systematic bending experiments for 3D-printed single-edge notched specimens with such architecture indicate that total energy dissipations are insensitive to initial crack orientations and show optimized values at critical pitch angles. Fracture mechanics analyses demonstrate that the hybrid toughening mechanisms of crack twisting and crack bridging mode arising from DFB architecture enable excellent fracture resistance wit

SUBMITTER: Wu K 

PROVIDER: S-EPMC7355047 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature