Analysis of information sources in references of the Wikipedia article "Liberty ship" in English language version.
Little Boy yield: 15 kilotons / Fat Man yield: 21 kilotons
The brittle fractures that occurred in the Liberty Ships were caused by low notch toughness at low temperature of steel at welded joint, which started at weld cracks or stress concentration points of the structure. External forces or residual stress due to welding progress the fracture. Almost all accidents by brittle fractures occurred in winter (low temperature). In some cases, residual stress is main cause of fracture.
(2,710 ships were completed, as one burned at the dock.)
mass-produced during the war, the Liberty Ship had become a symbol of the miracle of American production
mass-produced during the war, the Liberty Ship had become a symbol of the miracle of American production
(2,710 ships were completed, as one burned at the dock.)
Little Boy yield: 15 kilotons / Fat Man yield: 21 kilotons
