CAUSES OF CLEAVAGE FRACTURE IN SHIP PLATE: HATCH CORNER TESTS.

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Abstract:

Six full scale specimens, similar in design to a hatch corner of a ship, were constructed from a low carbon, ship quality, semi-killed steel and tested to failure. One tested at 120 F gave a shear type fracture. All others tested at room temperature failed with cleavage type fractures. Two which were welded with preheat at 400 F showed superior performance, both in strength and energy absorption. Two which were fabricated by riveting gave inferior performance. An investigation was conducted to determine the effects of preheat and a comparison made with the effects of 1000 F postheat treatment for 8 hours. Studies were made of quarter scale symmetrical and asymmetrical hatch corner models to determine which type of specimen would best duplicate the stress condition existing in actual ships. Author

Author(s):
Degarmo, E. Paul ; Meriam, J. L. ; Grassi, R. C. ; Harman, J. W.
Author Organization(s):
CALIFORNIA UNIV BERKELEY
Descriptive Note:
Progress rept. 1 Sep 45-1 Mar 46.
Supplementary Note:
See also AD-636 743.
Pagination:
0078

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
NObs-31222
Project Number(s):
SR-92
 Subject Terms
Joint Capability Areas:
JCA_4_Logistics
Communities of Interest:
Ground and Sea Platforms
Descriptor(s):
*SHIP PLATES, *HATCHES, WELDS, SHIP HULLS, STEEL
Field(s)/Group(s):
Properties of Metals and Alloys, Marine Engineering
Keyword(s):
SHIP HATCHES
Report Date:
1946 Jul 24