Definition and validation of an interaction rule for two cracks submitted to a complex loading. (February 2018)

• Record Type: Journal Article
• Authors: Chapuliot, Stéphane; Blouin, Arnaud
• Is Part Of: International journal of pressure vessels and piping. Volume 160(2018)
• Page Start: 34
• Page End: 42
• Publication Date: 2018-02
• Subjects: Pressure vessels -- Periodicals; Pipe -- Periodicals; Récipients sous pression -- Périodiques; Tuyaux -- Périodiques; Pipe; Pressure vessels; Periodicals; 681.76041
• DOI: 10.1016/j.ijpvp.2017.12.003
• Languages: English
• ISSNs: 0308-0161

Abstract

Abstract: The article deals with the question of flaws interaction when two cracks are too close to each other to apply a conventional Fracture Mechanics justification approach based on isolated crack consideration. Within that frame, a bibliography and FE modeling were performed in order to define precisely interaction limits and cracks analysis in the case of two isolated cracks submitted to various modes of loading. Those limits, firstly defined through an exhaustive 2D FE modeling, were modified and completed through 3D FE modeling in order to take into account cracks with a finite length, plasticity and/or a complex stress states. From that important work, a simple limit for cracks interaction is proposed and then validated through the application to an industrial case. Highlights: Bibliography and complementary F.E. modeling on two defect interaction. Presence of residual stresses. 3D elastic and elastic-plastic modeling. Plasticity under severe thermal shock loading. Simple geometrical rule for the exclusion of defect interaction.