Analysis of two-dimensional fatigue crack propagation in thin aluminum plates using the Paris law modified by a closure concept

Marcel Sato, Lucas S. Moura, Andres F. Galvis, Eder L. Albuquerque, Paulo Sollero*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A general procedure is applied to analyze fatigue crack propagation in isotropic materials under mixed mode conditions, the Paris law modified by a closure concept. The dual boundary element method (DBEM) provides an stress and strain analysis on the solid, with reliable results for the mechanical fields in the region near to the crack tip. For validating purposes, thin plates made of 2024-T3 aluminum alloy are used with two horizontal notches. Throughout the J-Integral the stress intensity factors (SIFs) can be evaluated and with digital image processing, the displacement information from the experimental tests is obtained. Then, the effect of the crack closure during unloading is considered to attain remarkable numerical results compared to those experimentally collected, showing the feasibility of the proposed model.

Original languageEnglish
Pages (from-to)513-527
Number of pages15
JournalEngineering Analysis with Boundary Elements
Volume106
Early online date27 Jun 2019
DOIs
Publication statusPublished - Sep 2019

Keywords

  • Boundary element method
  • Closure model
  • Digital image correlation
  • Fatigue crack propagation

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