Accession Number : ADA304892

Title :   Fracture Mechanics Tests and Defect Criteria for the 120-mm M121 Mortar Baseplate.

Descriptive Note : Final rept.,

Corporate Author : ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS

Personal Author(s) : Underwood, J. H. ; Troiano, E. ; Crayon, D.

PDF Url : ADA304892

Report Date : OCT 1995

Pagination or Media Count : 14

Abstract : Calculations of firing stress at several locations of the 120-mm M121 mortar baseplate were made based on available strain gage data. Measurements of fracture toughness were performed for seven weld and heat-treat conditions of the 4130 steel used for the baseplate. Calculations were made of the ratio of applied K to the critical K for fracture for various combinations of firing stress and material condition. Based on the results of the tests and calculations, allowed defect criteria for the baseplate were recommended. (MM)

Descriptors :   *FRACTURE(MECHANICS), *MORTARS, STRESS ANALYSIS, FIRING TESTS(ORDNANCE), CRACKING(FRACTURING), DISPLACEMENT, TOUGHNESS, HEAT TREATMENT, WELD METAL, DEFECTS(MATERIALS), PLATES, FAILURE(MECHANICS), WELDING, GUN MOUNTS.

Subject Categories : Guns

Distribution Statement : APPROVED FOR PUBLIC RELEASE