Numerical research on residual ultimate strength of ship hull plates under uniaxial cyclic loads

The residual ultimate strength of ship hull plates under uniaxial cyclic load is studied by numerical analysis using nonlinear finite element method. Strength behaviors of plate under cyclic loading are obtained and analyzed. The crack propagation from the low cycle fatigue damage is considered in present study. Three cyclic load cases are firstly analyzed and discussed in the assumption that fatigue crack propagation will not happen. Then accumulated residual stress and strain at the crack tip duo to cyclic loads are studied when the fatigue crack is taken into consideration. The crack propagation rate is treated by a simple method based on the accumulated residual strain at the crack tip to improve computational efficiency in the numerical analysis. A typical relationship between the residual ultimate strength and number of cycles is established through the crack length. From the numerical results some significant conclusions are drawn to the residual ultimate strength of plates under uniaxial cyclic loads.

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  • English

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  • Accession Number: 01689664
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 14 2018 3:07PM