The effect of crack-tip constraint in some problems of fracture mechanics. (March 2020)

• Record Type: Journal Article
• Authors: Matvienko, Yu.G.
• Is Part Of: Engineering failure analysis. Volume 110(2020)
• Publication Date: 2020-03
• Subjects: Crack-tip constraint -- T-stress -- Parameter A -- Fracture mechanics; System failures (Engineering) -- Periodicals; Fracture mechanics -- Periodicals; Reliability (Engineering) -- Periodicals; Pannes -- Périodiques; Rupture, Mécanique de la -- Périodiques; Fiabilité -- Périodiques; Fracture mechanics; Reliability (Engineering); System failures (Engineering); Periodicals; Electronic journals; 620.112
• DOI: 10.1016/j.engfailanal.2020.104413
• Languages: English
• ISSNs: 1350-6307

Abstract

Highlights: The non-singular T-stress components and the parameter A are employed as crack-tip constraint parameters. The effect of in-plane and out-of-plane crack-tip constraint parameters in fracture mechanics is discussed. The crack tip plastic zone, the failure assessment diagram, the crack path are analyzed from viewpoint of local constraint. The parameter A is introduced in fracture criterion as a constraint parameter. Abstract: The effect of in-plane and out-of-plane crack-tip constraint parameters, namely, the non-singular T -stress components and the parameter A, in some problems of elastic and elastic-plastic fracture mechanics is discussed. The three-dimensional crack tip stresses including the non-singular T-stress components are employed to describe the crack tip plastic zone, the failure assessment diagrams and the constraint-dependent fracture toughness for a solid with a finite notch/crack under mode I loading and different angles of surface crack growth under conditions of rolling-sliding. Theoretical and numerical aspects of the two-parameter J-A approach in elastic-plastic fracture mechanics are presented in connection with crack-tip constraint. It is shown that the parameter A can be introduced in a fracture criterion as a constraint parameter.