On the influence of crack front curvature on the fracture behavior of nanoscale cracks

Möller J, Bitzek E (2015)


Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2015

Journal

Publisher: Elsevier

Book Volume: 150

Pages Range: 197-208

DOI: 10.1016/j.engfracmech.2015.03.028

Abstract

Atomic-scale fracture processes are traditionally investigated in quasi-2D models of straight, infinite cracks. This approach neglects crack front curvature effects, which might be particularly important for nanoscale crack nuclei in semi-brittle materials. Here we use 3D atomistic simulations to study penny-shaped cracks in body-centered cubic metals. Our results show extensive crack tip plasticity initiated by deformation twinning and followed by emission of screw dislocations which cross-slip along the crack front. Together with the interactions of dislocations and/or twins that are nucleated at differently oriented parts of the crack, these processes determine the fracture behavior of highly curved nanoscale cracks.

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APA:

Möller, J., & Bitzek, E. (2015). On the influence of crack front curvature on the fracture behavior of nanoscale cracks. Engineering Fracture Mechanics, 150, 197-208. https://dx.doi.org/10.1016/j.engfracmech.2015.03.028

MLA:

Möller, Johannes, and Erik Bitzek. "On the influence of crack front curvature on the fracture behavior of nanoscale cracks." Engineering Fracture Mechanics 150 (2015): 197-208.

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