152. MECHANICAL PERFORMANCE, CONSTITUTIVE RESPONSE, AND FRAGMENTATION OF TAILORED MESOSTRUCTURED ALUMINUM-BASED COMPACTS

Department: Mechanical & Aerospace Engineering
Research Institute Affiliation: Graduate Program in Materials Science and Engineering
Faculty Advisor(s): Marc A. Meyers

Primary Student
Name: Andrew Marquez
Email: a5marque@ucsd.edu
Phone: 626-652-8609
Grad Year: 2016

Abstract
The fragmentation and constitutive response of aluminum-based compacts was examined under dynamic conditions using mesostructured powder compacts in which the interfaces between the powders (sizes of 40, 100, and 400 μm) were tailored during the swaging fabrication process. Fragmentation was induced in ring samples of this material through explosive loading and was examined through high speed photography, laser interferometry and soft capture of fragments. Fragment velocities of around 100 m/s were recorded. The fragment mass distributions obtained correlated in general with the interfacial strength of the compacts as well as with powder size. Experimental results are compared with fragmentation theories to characterize the behavior of reactive powders based on the material?s mesostructure by introducing the fracture toughness of the compacts. The mean fragment size is calculated using a modified form of Mott?s theory and successfully compared with experimental results.

Industry Application Area(s)
Aerospace, Defense, Security | Materials

« Back to Posters or Search Results


Contact:   researchexpo@soe.ucsd.edu   (858) 534-6068