Fishnet model for failure probability tail of nacre-like imbricated lamellar materials
Abstract
The astonishing strength enhancement in the nacre of pearl oyster, compared with its main constituent, the aragonite, has recently been explained by the nanostructure of overlapping nanoscale platelets—but only deterministically. It is also necessary to know the stress value for which the failure probability does not exceed 1 in a million. It is shown that, at such a low-failure probability, the nacre-like structures exhibit additional advantages. The strength increases by about 10%, while at fixed, correspondingly low, stress, the failure probability decreases by 1 to 2 orders of magnitude, compared with the standard (Weibullian) extrapolation from the deterministic prediction and coefficient of variation. These are advantages important for biomimetic engineering applications.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 27, 2017
- Source ID
- 10.1073/pnas.1714103114
Entities
People
- Wen Luo
- Zdeněk Bažant
Organizations
- Army Research Office
- National Science Foundation
- Northwestern University