Size effect in fracture: Roughening of crack surfaces and asymptotic analysis

Article

关键词: QUASIBRITTLE FRACTURE;    PROCESS ZONE;    MECHANICS;    ROUGHNESS;    TOUGHNESS;    LENGTH;    MODELS;    SOLIDS;    WOOD;   

DOI  :  10.1103/PhysRevB.65.104101

来源: SCIE

【 摘 要 】

Recently the scaling laws describing the roughness development of fracture surfaces were proposed to be related to the macroscopic elastic energy released during crack propagation. On this basis, an energy-based asymptotic analysis allows us to extend the link to the nominal strength of structures. We show that a Family-Vicsek scaling leads to the classical size effect of linear elastic fracture mechanics. On the contrary, in the case of an anomalous scaling, there is a smooth transition from the case of no size effect, for small structure sizes, to a power-law size effect which appears weaker than the linear elastic fracture mechanics one, in the case of large sizes. This prediction is confirmed by fracture experiments on wood.

【 授权许可】

Free