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FEM assessment of the procedures providing for a uniform crack shape in specimens for fracture toughness tested in full thickness
https://doi.org/10.22349/1994-6716-2021-108-4-179-188
Abstract
Acceptance tests of base metal and welded joints include the evaluation of critical CTOD values as required in product specifications. Tests have to be done in natural (full) thickness. For blanks made of pipes, quantitative criteria of satisfactory straightening and the fixture dimensions are developed. Satisfactory fatigue precrack front linearity can be attained with additional treatment. Local side compression appears efficient for the examined materials. Sequential FEM calculations of welding, side compression and specimen notching allow constructing the residual stress curves to predict fatigue crack extension. The optimum compression displacement is found. The above sequence of operations is proved to be preferable in comparison with side compression performed after notching.
About the Authors
V. Yu. Filin
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Dr Sc (Eng)
49 Shpalernaya St, 191015 St Petersburg
A. V. Mizetsky
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
O. P. Vinogradov
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
K. E. Sadkin
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Cand Sc. (Eng)
49 Shpalernaya St, 191015 St Petersburg
E. D. Nazarova
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
A. V. Poroshkov
JSC “VMZ”
Russian Federation
Russian Federation
45 Bratiev Batashovykh St, 607061 Nizhny Novgorod, Vyksa
D. A. Pyshkin
JSC “VMZ”
Russian Federation
Russian Federation
45 Bratiev Batashovykh St, 607061 Nizhny Novgorod, Vyksa
References
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Review
For citations:
Filin V.Yu., Mizetsky A.V., Vinogradov O.P., Sadkin K.E., Nazarova E.D., Poroshkov A.V., Pyshkin D.A. FEM assessment of the procedures providing for a uniform crack shape in specimens for fracture toughness tested in full thickness. Voprosy Materialovedeniya. 2021;(4(108)):179-188. (In Russ.) https://doi.org/10.22349/1994-6716-2021-108-4-179-188
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