David Damm
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Phase-field modeling of aging-induced microstructure evolution in pentaerythritol tetranitrate thin films and ramifications for shock initiation Open
Aging of energetic materials may change performance and affect their safety and reliability, but the relationship between microstructure changes induced by aging and consequent performance changes has not been fully established. This work …
View article: A Theoretical Analysis on the Dynamic Behavior and Electromechanical Response of PZT
A Theoretical Analysis on the Dynamic Behavior and Electromechanical Response of PZT Open
Piezoelectric materials are used as a power source in stockpile components for safety and reliability assurances. The objective of this project is to gain insights into the fundamental pressure-induced behavior and electromechanical respon…
A generalization of the shock invariant relationship Open
Shock invariant relationship, which was conceived for inert shock waves to derive the 4th power relationship between shock pressure and maximum strain rate, is generalized for reactive shock waves such as Chapman–Jouget detonation and shoc…
Understanding Microstructure Variability in Vapor-Deposited Energetic Materials by Using Phase-Field Methods Open
Critical components, such as detonators, in Sandia's stockpile contain heterogeneous materials whose performance and reliability depend on accurate, predictive models of coupled, complex phenomena to predict their synthesis, processing, an…
Modelling the Fluctuations of Reactive Shock Waves in Heterogeneous Solid Explosives as Stochastic Processes Open
While current phenomenological burn models are useful for describing the average or bulk reactive flow behaviour of heterogeneous explosives, one fundamental weakness inherent to these models is the loss of detailed microstructural informa…
View article: Shock interactions with heterogeneous energetic materials
Shock interactions with heterogeneous energetic materials Open
The complex physical phenomenon of shock wave interaction with material heterogeneities has significant importance and nevertheless remains little understood. In many materials, the observed macroscale response to shock loading is governed…
View article: Spectroscopic analysis of time-resolved emission from detonating thin film explosive samples
Spectroscopic analysis of time-resolved emission from detonating thin film explosive samples Open
We report a series of time-resolved spectroscopic measurements that aim to characterize the reactions that occur during shock initiation of high explosives. The experiments employ time- and wavelength-resolved emission spectroscopy to anal…
View article: Characterizing the growth to detonation in HNS with small-scale PDV “cutback” experiments
Characterizing the growth to detonation in HNS with small-scale PDV “cutback” experiments Open
For many decades, cutback experiments have been used to characterize the equation of state and growth to steady detonation in explosive formulations. More recently, embedded gauges have been used to capture the growth to steady detonation …