DYNAMIC FRACTURE PROPERTIES OF A TUNGSTEN, 3.5 % Ni, 1.5 % Fe ALLOY UNDER EXPLOSIVE LOADING CONDITIONS

Abstract

La fragmentation naturelle et la fracturation de cylindres creux en alliage de tungstène (95 % W, 3,5 % Ni, 1,5 % Fe) remplis d'un explosif, ont été analy-sées par le biais d'une étude paramétrique sur les dimensions caractéristi-ques des cylindres. On observe que le rapport masse/nombre des fragments suit une loi bilinéaire conforme à la relation de Payman modifiée. La classifica-tion dimensionnelle des fragments constitue une base de données pour l'étude du mode de fragmentation de systèmes rainures à base de cet alliage. Abstract- The natural fragmentation and fracture characteristics of a tungsten alloy (95%W,3.5%Ni,1.5%Fe) are evaluated using hollow, explosive-filled cylinders whose dimensions are varied systematically. Fragment mass/number distributions are found to conform to a dual slope linear fit to the modified Payman distribution. Fragment classifications and measurements are used to determine baseline data for efficient design of notching systems to control the breakup of casings made from this alloy into fragments of preferred size. 1

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