Effect of interface plasticity on circular blisters. (1st March 2016)

• Record Type: Journal Article
• Authors: Ruffini, Antoine; Finel, Alphonse; Colin, Jérôme; Durinck, Julien
• Is Part Of: Scripta materialia. Volume 113(2016)
• Page Start: 222
• Page End: 225
• Publication Date: 2016-03-01
• Subjects: Buckling -- Dislocations -- Sliding -- Delamination -- Phase-field; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.10.038
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Numerical simulations based on finite-strain elasticity and a phase-field model of dislocations reveal that dislocations are emitted at the crack-front delamination of a circular blister. It is shown that the phenomenon induces a sliding in the film-substrate interface that modifies the shape of the buckling structure. This phenomenon is theoretically quantified introducing an axisymmetric sliding into the Föppl and von-Kármán equations that describe the elastic behavior of the film. By extending the analytical investigations to the crack opening, it is shown that dislocation-induced sliding may stabilize the buckling-driven delamination of three-dimensional structures.