The crack growth rate during cyclic loading is investigated via numerical simulations. The crack advancement is governed by a propagation criterion that relates the increment in plastically dissipated energy ahead of the crack tip to a critical value. Once this critical value is satisfied, crack propagation is modeled via a node release scheme. Thus, the crack growth rate is an output from the numerical simulation. The crack growth rate predicted by the proposed scheme is compared with published experimental crack growth data in the Paris-regime for selected metals. A good match is found between the experimentally observed crack growth rates and the numerically obtained results. The Paris coefficients are subsequently evaluated from the numerically obtained crack growth rates.
Article
Numerical Evaluation of Paris-Regime Crack Growth Rate Based on Plastically Dissipated Energy
Engineering Fracture Mechanics
Document Type
Article
Publication Date
7-1-2014
Disciplines
Abstract
DOI
10.1016/j.engfracmech.2014.04.013
Version
Postprint
Publisher's Statement
NOTICE: this is the author’s version of a work that was accepted for publication in Engineering Fracture Mechanics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Engineering Fracture Mechanics, 124, 155-166, (7-2014); 10.1016/j.engfracmech.2014.04.013
Creative Commons License
Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International
Citation Information
Nittur, P. G., Karlsson, A. M., and Carlsson, L. A., 2014, "Numerical Evaluation of Paris-Regime Crack Growth Rate Based on Plastically Dissipated Energy," Engineering Fracture Mechanics, 124–125, pp. 155-166