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DIRECTED
ENERGY
PROFESSIONAL
SOCIETY
Abstract: 25-Systems-026
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UNCLASSIFIED, PUBLIC RELEASE
Modeling and Characterization of the Lethality of Directed Energy Against Notional Threats
The use of directed energy (DE) weapons is increasing. This has led to an increase in the need for lethality modeling. In prior work, the focus was on time-to-melt through. However, when temperature-dependent material thermal and mechanical properties as well as forces of flight are considered, there may be alternative kill mechanisms. These could include structural failure due to stresses on the target exceeding yield stress. The focus of this research is to (1) measure material yield strength under temperature changes with common target materials, (2) utilize updated modeling with finite element modeling software COMSOL including measured yield strength to estimate time-to-kill and deformation analysis of targets at faster speeds, and (3) utilize material parameters for Aluminum Alloy 7075 and Stainless Steel 309 such as temperature dependent heat capacity, Youngs' Modulus, and coefficient of heat transfer to refine our COMSOL models.
UNCLASSIFIED, PUBLIC RELEASE
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