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Caracterização de parâmetros e ignição térmica de onda de choque em tubo de choque usando simulação numérica
(Universidade Federal de Minas GeraisUFMG, 2018-12-17)
The present work consisted in developing a computational routine to predict and characterize the parameters of ignition delay time, shock wave pressure, chemical reaction velocity, shock wave propagation velocity, Mach ...
Commodity price shocks and production networks
(Universidad de Chile, 2022)
This paper studies how different patterns in production networks can help to explain the
impact of commodity price shocks on aggregate outcomes. I present a new empirical pattern associated with commodity sectors that I ...
Bayesian parameter estimation for space and time interacting earthquake rupture model using historical and physics-based simulated earthquake catalogs
(Seismological Society of America, 2021-12)
This article introduces a framework to supplement short historical catalogs with synthetic catalogs and determine large earthquakes’ recurrence. For this assessment, we developed a parameter estimation technique for a ...
Experimental evidence of shock mitigation on a Hertzian tapered Chain
(2006)
We present an experimental study of the mechanical impulse propagation through a horizontal alignment of elastic spheres of progressively decreasing diameter phi(n): namely, a tapered chain. Experimentally, the diameters ...
Contactless pressure measurement of an underwater shock wave in a microtube using a high‑resolution background‑oriented schlieren technique
(Springer, 2022)
A high-resolution background-oriented schlieren (BOS) technique, which utilizes a high-resolution camera and a microdot
background pattern, is proposed and used to measure the pressure field of an underwater shock wave ...
Periodicidades no fluxo de raios cósmicos e análise de choques interplanetários
(Universidade Federal de Santa MariaCentro de Ciências Naturais e Exatas, 2010-01-08)
Muons and neutrons that reach the Earth surface with high energy constitute a particles’ group called secondary cosmic rays. In order to study the flux of this particles data from muons and neutrons stations are used. The ...
Interplay of plasticity and phase transformation in shock wave propagation in nanocrystalline iron
(IOP Publishing, 2014-09)
Strong shock waves create not only plasticity in Fe, but also phase transform the material from its bcc phase to the high-pressure hcp phase. We perform molecular-dynamics simulations of large, 8-million atom nanocrystalline ...
Building spectral element dynamic matrices using finite element models of waveguide slices and elastodynamic equations
(Ios PressAmsterdamHolanda, 2013)
Amorphization and nanocrystallization of silicon under shock compression
(Pergamon-Elsevier Science Ltd, 2016-01)
High-power, short-duration, laser-driven, shock compression and recovery experiments on [001] silicon unveiled remarkable structural changes above a pressure threshold. Two distinct amorphous regions were identified: (a) ...