New perspective of fracture mechanics inspired by gap test with crack-parallel compression

Public Time: 2020-06-23 00:00:00
Journal: PNAS
doi: 10.1073/pnas.2005646117
Author: Hoang Nguyen,Madura Pathirage,Masoud Rezaei,Mohsen Issa,Gianluca Cusatis,Zdeněk P. Bažant
Summary: Fracture mechanics has long been an essential tool for ensuring safety, efficiency, and durability in the mechanical, aerospace, nuclear, naval, petroleum, and other industries. Recently, with the adoption of fracture-based size effect law for design code of American Concrete Institute (ACI-318), fracture mechanics has also become the basis of designing concrete structures against quasibrittle failures. The present experimental discovery will improve the fracture predictions for concrete, rock (including shale), fiber composites, tough ceramics, sea ice, wood, and other quasibrittle materials.
Keyword tag: 
fracture energy ; cohesive crack model ; finite element crack band model ; softening damage ; quasibrittle materials