Lichtenberg optimization algorithm applied to crack tip identification in thin plate-like structures

Abstract

Purpose

This study aims to develop a numerical identification and characterization of crack propagation through the use of a new optimization metaheuristics called Lichtenberg optimization.

Design/methodology/approach

The damage-identification problem is treated as an inverse problem, which combines finite element methods with intelligent computational methods to obtain the best possible response. To optimize the objectives, the Lichtenberg algorithm is applied, which includes concepts of random cluster growth in nature.

Findings

The simulations show that it is possible to determine the Lichtenberg spectrum algorithm a part of the structure to be removed and replaced in this case to stop the propagation.

Originality/value

The results show a very good crack identification in plates-like structures using the Lichtenberg algorithm (LA) based only in strain fields. Although many studies have reported on damage-identification-based optimization methods, very few have focused on the crack tip modeling and LA as the main solver.

Citation

Pereira, J.L.J., Chuman, M., Cunha Jr, S.S. and Gomes, G.F. (2021), "Lichtenberg optimization algorithm applied to crack tip identification in thin plate-like structures", Engineering Computations, Vol. 38 No. 1, pp. 151-166. https://doi.org/10.1108/EC-12-2019-0564