Effect of Crack Blunting on Subsequent Crack Propagation
نویسندگان
چکیده
منابع مشابه
Effect of Crack Blunting on Subsequent Crack Propagation
Theories of toughness of materials depend on an understanding of the characteristic instabilities of the crack tip, and their possible interactions. In this paper we examine the effect of dislocation emission on subsequent cleavage of a crack and on further dislocation emission. The work is an extension of the previously published Lattice Greens Function methodology[1, 2, 3]. We have developed ...
متن کاملCrack blunting, crack bridging and resistance-curve fracture mechanics in dentin: effect of hydration.
Few studies have focused on a description of the fracture toughness properties of dentin in terms of resistance-curve (R-curve) behavior, i.e., fracture resistance increasing with crack extension, particularly in light of the relevant toughening mechanisms involved. Accordingly, in the present study, fracture mechanics based experiments were conducted on elephant dentin in order to determine su...
متن کاملPropagation of Crack in Linear Elastic Materials with Considering Crack Path Correction Factor
Modeling of crack propagation by a finite element method under mixed mode conditions is of prime importance in the fracture mechanics. This article describes an application of finite element method to the analysis of mixed mode crack growth in linear elastic fracture mechanics. Crack - growth process is simulated by an incremental crack-extension analysis based on the maximum principal stress c...
متن کاملCrack blunting and the strength of soft elastic solids
When a material is so soft that the cohesive strength (or adhesive strength, in the case of interfacial fracture) exceeds the elastic modulus of the material, we show that a crack will blunt instead of propagating. Large-deformation nite-element model (FEM) simulations of crack initiation, in which the debonding processes are quanti ed using a cohesive zone model, are used to support this hy...
متن کاملDegradation Models and Crack Propagation
In experiments where failure times are sparse, degradation analysis is useful for the analysis of failure time distributions in reliability studies. This research investigates the link between a practitioner’s selected degradation model and the resulting lifetime model. Simple additive and multiplicative models with single random effects are featured. Results show that seemingly innocuous assum...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: MRS Proceedings
سال: 1995
ISSN: 0272-9172,1946-4274
DOI: 10.1557/proc-408-237