Institute of Physics of Materials AS CR, v. v. i. > Projects > Assessment of fatigue damage of thin-walled structures

Assessment of fatigue damage of thin-walled structures

Investigatordoc. Ing. Pavel Hutař, Ph.D.
Number of Project101/09/0867
AgencyGrantová agentura České republiky
Duration2008-12-31 - 2011-12-30

Anotace
Thin-walled structures are important elements of many important industrial areas such an aerospace, shipbuilding, pipelines and others. On the other way sometimes is necessary predict fatigue damage from thin and small specimens for relatively big structural components. Therefore, accurate transfer of the experimental results obtained from thin and small specimen to big structural components and vice versa is general goal of the project. Based on finite elements numerical calculations of thin-walled structures will be developed procedure describing crack type damage in thin-walled structures. Experimental verification will be made using Eurofer 97 and feritic oxide dispersion strengthened (ODS) steels which is perspective structural material of DEMO fusion reactor. Generally, the predictive power of the approaches developed within this project will help towards a better understanding of thin-walled structure failure and more reliable prediction of their residual life time.


2012

Hutař P., Ševčík M., Náhlík L., Knésl Z.: Fatigue crack shape prediction based on the stress singularity exponent. Key Eng. Mater. 488-489 (2012) 178-181

Ševčík M., Hutař P., Zouhar M., Náhlík L.: Numerical estimation of the fatigue crack front shape for a specimen with finite thickness. Int. J. Fatigue 39 (2012) 75-80



2011

Kruml T., Polák J.: Fatigue cracks in Eurofer 97 steel: Part I. Nucleation and small crack growth kinetics. J. Nucl. Mater. 412 (2011) 2-6

Kruml T., Hutař P., Náhlík L., Seitl S., Polák J.: Fatigue cracks in Eurofer 97 steel: Part II. Comparison of small and long fatigue crack growth. J. Nucl. Mater. 412 (2011) 7-12

Seitl S., Fernández-Zúniga D., Fernández-Canteli A.: Using a tensor model for analyzing some aspects of mode-II loading. Appl. Comput. Mech. 5 (2011) 55-66

Hutař P., Náhlík L., Ševčík M., Seitl S., Kruml T., Polák J.: Fatigue crack propagation rate in EUROFER 97 estimated using small specimens. Key Eng. Mater. 452-453 (2011) 325-328