Abstract
Traditionally, a failure strain criterion is used in crash simulations in the maritime and offshore industry. More sophisticated methods for multi-axial stress states are based on the Forming Limit Diagram and the Fracture Forming Limit Diagram (FFLD). The diagrams are derived for the steel sheet forming industry, such as car parts. Few tests are performed on specimens with plate thickness repre-sentative for maritime application. Full thickness effects can not be neglected. In this paper, full thickness material failure tests are described. S355 and S690 samples have been subjected to lateral impact. Round specimens, fully clamped, simulate an equi-biaxial strain state. Apple core shaped specimens simulate the plane strain conditions. Tests results are analyzed by Digital Image Correlation techniques, acceler-ometers and ultrasonic thickness measurements. The failure of the specimens are depicted in the FLD diagrams, showing the relevance of these tests for updating failure criteria for maritime and offshore impact analysis.
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