"Guidelines for Fatigue Strength Assessment Based on Fracture Mechanics
Methodology" aim to provide recommendations and regulations for fatigue
analysis methods based on fracture mechanics theory. This guide is applicable
to the fatigue strength assessment of typical details, with load calculations
using either the Equivalent Design Wave method or Spectral Analysis method. It
can be used to address issues related to fatigue strength assessment of
ultra-thick plate structures, as well as the evaluation of crack propagation
for leakage analysis in Type B independent liquid cargo compartments of
liquefied gas ships.
guidelines are developed based on theoretical analysis of ship structures,
validation experiments, and verification studies of full-scale ship calculation.
As a supplementary and supportive tool for fatigue strength calculations using
the S-N curve method (based on fracture mechanics), this guide is employed in
design when the detail type cannot match the standard S-N curve or when
existing regulations explicitly require the use of fracture mechanics for
fatigue assessment. In such cases, fatigue strength analysis for the detail can
be conducted based on these guidelines.
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