RT Conference Proceedings
T1 A numerical analysis of the plastic wake influence on plasticity induced crack closure
A1 Camas-Peña, Daniel
A1 Antunes, Fernando Ventura
A1 López-Crespo, Pablo
A1 González-Herrera, Antonio
K1 Materiales - Fatiga
AB Fatigue crack closure has been studied by means of finite element method since long timeago. Most work has been performed considering bi-dimensional models. Lately, the use of threedimensionalmodels has been extended. Nevertheless, the methodology employed has been taken fromthat developed for bi-dimensional cases.There are a great number of previous bi-dimensional studies which analyse different numericalparameters and optimise them. The current computational capabilities allow a comprehensive study ofthe influence of the different modelling parameters in a similar way to those studies carried out with bidimensionalmodels, with the advantage, that the evolution along the thickness of the analysedparameters can be taken into consideration.In particular, one of the key issues is related to the plastic wake length which is developed during theprevious loading cycles. This residual stresses have a great influence on the crack opening and closurevalues. As the numerical analysis are complex and computationally expensive, the length of thesimulated wake is a critical parameter.In this work, a comprehensive study of the effect of the plastic wake in fatigue crack closure is made.On this purpose, a CT aluminium specimen has been modelled three-dimensionally and severalcalculations have been made in order to evaluate the influence of the simulated plastic wake length. Thenumerical analysis is made in terms of crack closure and opening values as in terms of the stress andstrain fields near the crack front.
YR 2017
FD 2017-09-18
LK http://hdl.handle.net/10630/14480
UL http://hdl.handle.net/10630/14480
LA spa
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026