Accession Number : AD0636742

Title :   CAUSES OF CLEAVAGE FRACTURE IN SHIP PLATE: FLAT PLATE TESTS.

Descriptive Note : Technical rept.

Corporate Author : CALIFORNIA UNIV BERKELEY

Personal Author(s) : Davis, Harmer E. ; Troxell,G. E. ; Boodberg,A. ; Parker,Earl R.

Report Date : APR 1946

Pagination or Media Count : 181

Abstract : The principal materials used in the tests were three lots of semikilled, hull quality steels. The specimens in the principal program of tests were tested in tension in widths of 72, 48, 24, and 12 in. The specimens all contained a narrow, central, transverse slot having a length of one-fourth of the plate width. Tests were made at each of a number of temperatures in order to determine the range of temperature within which the mode of failure changed from a ductile, shear type to a brittle, cleavage type. In these tests, observations were made to determine the maximum load, failure load, strain distribution across the faces of the plates over several gage lengths, energy absorbed to maximum load, the mode of fracture, and the reduction of thickness near the break. Whenever observations could be made, the load at the development of cracks was also recorded.

Descriptors :   (*SHIP PLATES, *FRACTURE(MECHANICS)), SHIP HULLS, STEEL, TRANSITION TEMPERATURE, FAILURE(MECHANICS), HARDNESS, EXPERIMENTAL DATA, LOADS(FORCES)

Subject Categories : Metallurgy and Metallography
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE