Date of Award

2016

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Mechanical and Aerospace Engineering

Committee Chair

Q. H. Ken Zuo

Committee Member

Judith Schneider

Committee Member

Michael Banish

Subject(s)

Weapons system--Design and construction., Fragmentation bombs., Metals--Fracture.

Abstract

Fragmentation of bimetallic shells under explosive loading has been modeled computationally. In particular, the effects of varying material percentages on the fragmentation characteristics (average fragment size, mass distribution of the fragments) were investigated. The two materials considered in this study are Oxygen-Free High Thermal Conductivity (OFHC) Copper (as the inner layer) and Inconel 718 (as the outer layer). Several shell dimensions were considered, and the percentage of each of the materials were varied for each shell dimension. The numerical results indicate that compared to monolithic shells, bimetallic shells with a small percentage of copper (as the inner layer) may be more effective in generating larger (hence more effective) fragments. The results of this study may be used to improve the design of metal shells to produce desired fragmentation characteristics.

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