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

Engineering Fracture Mechanics Elsevier

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.

Authors with CRIS profile

Johannes Möller Professur für Datenbasierte Materialmodellierung Erik Bitzek Professur für Datenbasierte Materialmodellierung

Additional Organisation(s)

Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden Exzellenz-Cluster Engineering of Advanced Materials (EAM) Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Related research project(s)

Plastic deformation, crack nucleation and fracture in lightweight intermetallic composite materials (EXC315 EAM (A3-7)) Exzellenz-Cluster Engineering of Advanced Materials Nov. 1, 2007 - Oct. 31, 2017

How to cite

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://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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