Damage Modeling of Weld Structures in Extreme Conditions
Abstract
The experimental modelling and numerical analysis of stress-strain state and fracture of lowalloyed welded steel samples test has been considered. The mechanical tests include tension and low-cycling fatigue of small welded steel probes. The mechanical heterogeneity has been estimated by the micro hardness test. The analysis include FEM of stress-strain state of inhomogeneity welded probes and stochastic modelling of cracks coalescence and growth. It has been shown that the stress and strain distribution could not be only criterion for estimation of possible failure places but it is necessary to take into account the inhomogeneity and defects in weld and heat affected zone also. Last ones are responsible for acceleration of damage accumulation and crack growth in steel structures. Thereby for exclude the catastrophic breakdown and failure of complex engineering systems the change of legacy approach to estimation of steel structures and organisation of constant surveillance are recommended. This research is beneficial to welders, modellers of structures, researches as a whole.
About the Authors
Mbelle Samuel Bisong
University of Douala
Cameroon
Cameroon
Valeriy Valer’evich Lepov
Larionov Institute of Physical and Technical Problems of the North SB RAS
Russian Federation
Russian Federation
Petr Vasil'evich Sivtsev
Institute of Mathematics and Informatics, North-Eastern Federal University named after M.K. Ammosov
Russian Federation
Russian Federation
Nikolai Innokent'evich Golikov
Larionov Institute of Physical and Technical Problems of the North SB RAS
Russian Federation
Russian Federation
Susanna Nikolaevna Makharova
Larionov Institute of Physical and Technical Problems of the North SB RAS
Russian Federation
Russian Federation
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Review
For citations:
Bisong M.S., Lepov V.V., Sivtsev P.V., Golikov N.I., Makharova S.N. Damage Modeling of Weld Structures in Extreme Conditions. Arctic and Subarctic Natural Resources. 2017;22(3). (In Russ.)
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