ESTIMATION OF CRACK PROPAGATION IN A PASSENGER SHIP’S DOOR CORNER

Abstract eng:
Fracture mechanics calculations are applied in order to estimate growth of cracks at a passenger ship’s door corner for two cases. First fatigue assessment is made for the case where no visible cracks have been detected in structures. The second assessment is conducted for the case where cracks have been detected during inspections. The main purpose of this study is to get an overview of critical crack size and growth, and their influence on the remaining fatigue life of the door corner and the associated bulkhead. A short discussion of utilisation of finite element analysis, full-scale measurements on board a passenger ship with fracture mechanics assessment is presented. Such assessment takes into account the effect of crack size and estimates the amount of the crack growth in order to set proper period for repair and service of structural component. Material parameters for fatigue life calculations are taken from fatigue data handbooks. Emphasis is made to point out the usefulness of fracture mechanics for estimating the fatigue life of cracked details in a ship hull. The analysis is made for a ship’s door corner which is situated in the area of maximum shear forces of the ship hull. The loading of the door corner is generated by applying measured nominal shear stresses of the associated bulkhead. The measured stresses corresponds 1500 hours data of a passenger ship normal operation in different wave conditions.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket