Prediction of creep crack initiation using a damage-based approach

C. M. Davies, M. Yatomi, N. P. O'Dowd, K. M. Nikbin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents a numerical study of creep crack initiation and growth in a fracture mechanics specimen. Creep data have been collected on uniaxial specimens of carbon-manganese steel at 360°C and Type 316H stainless steel at 550°C. The constitutive behaviour of the steel is described by a power law creep model and the deformation of the specimen is modelled using the finite element method. Elastic-creep and elasti-plastic-creep analyses are performed to predict crack extension under plane stress and plane strain conditions. Crack initiation and propagation is predicted based on the accumulation of ductile damage associated with void growth and coalescence. The results from the simulations are compared to experimental data. The sensitivity of the predictions to mesh size is high and merits further investigation.

Original languageEnglish
Title of host publication11th International Conference on Fracture 2005, ICF11
Pages3149-3154
Number of pages6
Publication statusPublished - 2005
Externally publishedYes
Event11th International Conference on Fracture 2005, ICF11 - Turin, Italy
Duration: 20 Mar 200525 Mar 2005

Publication series

Name11th International Conference on Fracture 2005, ICF11
Volume4

Conference

Conference11th International Conference on Fracture 2005, ICF11
Country/TerritoryItaly
CityTurin
Period20/03/0525/03/05

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