Elastic Moduli of Avian Eggshell.

ABSTRACT: We analyze 700 freshly-laid eggs from 58 species (22 families and 13 orders) across three orders of magnitude in egg mass. We study the elastic moduli using three metrics: (i) effective Young's modulus, E_FEM, by a combined experimental and numerical method; (ii) elastic modulus, E_nano, by nanoindentation, and (iii) theoretical Young's modulus, E_theory. We measure the mineral content by acid-base titration, and crystallographic characteristics by electron backscatter diffraction (EBSD), on representative species. We find that the mineral content ranges between 83.1% (Zebra finch) and 96.5% (ostrich) and is positively correlated with E_FEM-23.28 GPa (Zebra finch) and 47.76 GPa (ostrich). The EBSD shows that eggshell is an

SUBMITTER: Chiang PL 

PROVIDER: S-EPMC8533214 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature