Crack propagation models: numerical and experimental results on Ti–6Al–4V notched specimens

To investigate on corrosion fatigue, a reliable crack propagation rate model has to be adopted, along with a suitable fracture mechanics model, to decouple the mechanical contribution from the environmental effects. In the present work, a numerical algorithm is proposed to characterize the mechanica...

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Bibliographic Details
Published inFatigue & fracture of engineering materials & structures Vol. 40; no. 8; pp. 1276 - 1283
Main Authors Baragetti, S, Villa, F
Format Journal Article
LanguageEnglish
Published Oxford Wiley Subscription Services, Inc 01.08.2017
Subjects
Alloys
Corrosion fatigue
Corrosion rate
Corrosion tests
Crack propagation
crack propagation rate
Environmental effects
Fatigue failure
Fatigue tests
Finite element method
Fracture mechanics
Mechanical properties
Numerical analysis
numerical modelling
Propagation
Stress corrosion cracking
Stress intensity factors
Stress propagation
Titanium base alloys
Ti–6Al–4V
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Summary:To investigate on corrosion fatigue, a reliable crack propagation rate model has to be adopted, along with a suitable fracture mechanics model, to decouple the mechanical contribution from the environmental effects. In the present work, a numerical algorithm is proposed to characterize the mechanical behaviour of notched Ti–6Al–4V specimens for fatigue and corrosion fatigue tests. The method is based on theoretical crack propagation rate models, jointly with stress intensity factor range obtained from linear finite element models. Results are compared with experimental data for axial fatigue (R = 0.1) and theoretical models for fatigue crack growth, such as Paris, Walker and Kato.
ISSN:8756-758X
1460-2695
DOI:10.1111/ffe.12561