Investigation of the effect of the blast waves on the opposite propagating crack

2021 ◽  
Vol 144 ◽  
pp. 104818
Author(s):  
Peng Xu ◽  
Ren-shu Yang ◽  
Yang Guo ◽  
Cheng Chen ◽  
Yiqiang Kang
Keyword(s):  
Blast Waves ◽  
Propagating Crack

AEM investigation of ZrO2 solid solution formation in ZrO2/mullite composites

1984 ◽  
Vol 42 ◽  
pp. 408-409
Author(s):  
T. R. Dinger
Keyword(s):  
Solid Solution ◽  
Ion Beam ◽  
Analytical Electron Microscopy ◽  
Transformation Toughening ◽  
Solid Solution Formation ◽  
Solution Formation ◽  
Propagating Crack ◽  
Analytical Electron ◽  
Microcrack Toughening ◽  
Made In

Zirconia (ZrO2) is often added to ceramic compacts to increase their toughness. The mechanisms by which this toughness increase occurs are generally accepted to be those of transformation toughening and microcracking. The mechanism of transformation toughening is based on the presence of metastable tetragonal ZrO2 which transforms to the monoclinic allotrope when stressed by a propagating crack. The decrease in volume which accompanies this transformation effectively relieves the applied stress at the crack tip and toughens the material; microcrack toughening arises from the deflection of a propagating crack around sharply angular inclusions.These mechanisms, however, do not explain the toughness increases associated with the class of composites investigated here. Analytical electron microscopy (AEM) has been used to determine whether solid solution effects could be the cause of this increased toughness. Specimens of a mullite (3Al2O3·2SiO2) + 15 vol. % ZrO2 were prepared by the usual technique of mechanical thinning followed by ion beam milling. All observations were made in a Philips EM400 TEM/STEM microscope fitted with EDXS and EELS spectrometers.

3-D unstructured adaptive supercomputing for transient problems of volcanic blast waves

1998 ◽  
Author(s):  
P. Voinovich ◽  
E. Timofeev ◽  
K. Takayama ◽  
T. Saito ◽  
A. Galyukov
Keyword(s):  
Blast Waves ◽  
Transient Problems

scholarly journals Radiation-Driven Stellar Eruptions

Galaxies ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 10 ◽  
Author(s):  
Kris Davidson
Keyword(s):  
Mass Loss ◽  
Radiation Pressure ◽  
Central Region ◽  
Massive Stars ◽  
Variable Stars ◽  
Blast Waves ◽  
Subsequent Evolution ◽  
Fundamental Causes ◽  
Radiative Output ◽  
Luminous Blue Variable

Very massive stars occasionally expel material in colossal eruptions, driven by continuum radiation pressure rather than blast waves. Some of them rival supernovae in total radiative output, and the mass loss is crucial for subsequent evolution. Some are supernova impostors, including SN precursor outbursts, while others are true SN events shrouded by material that was ejected earlier. Luminous Blue Variable stars (LBV’s) are traditionally cited in relation with giant eruptions, though this connection is not well established. After four decades of research, the fundamental causes of giant eruptions and LBV events remain elusive. This review outlines the basic relevant physics, with a brief summary of essential observational facts. Reasons are described for the spectrum and emergent radiation temperature of an opaque outflow. Proposed mechanisms are noted for instabilities in the star’s photosphere, in its iron opacity peak zones, and in its central region. Various remarks and conjectures are mentioned, some of them relatively unfamiliar in the published literature.

Mitigation of exploding-wire-generated blast-waves by aqueous foam

2015 ◽  
Vol 27 (7) ◽  
pp. 076103 ◽  
Author(s):  
M. Liverts ◽  
O. Ram ◽  
O. Sadot ◽  
N. Apazidis ◽  
G. Ben-Dor
Keyword(s):  
Blast Waves ◽  
Exploding Wire ◽  
Aqueous Foam

scholarly journals Determination of the average ionization and thermodynamic regimes of xenon plasmas with an application to the characterization of blast waves launched in xenon clusters

2011 ◽  
Vol 7 (2) ◽  
pp. 71-76 ◽  
Author(s):  
R. Rodriguez ◽  
J.M. Gil ◽  
R. Florido ◽  
J.G. Rubiano ◽  
M.A. Mendoza ◽  
...  
Keyword(s):  
Blast Waves ◽  
Xenon Clusters

An interactive approach to local remeshing around a propagating crack

1989 ◽  
Vol 5 (1) ◽  
pp. 87-96 ◽  
Author(s):  
Paul A. Wawrzynek ◽  
Anthony R. Ingraffea
Keyword(s):  
Interactive Approach ◽  
Propagating Crack

scholarly journals Shock and blast waves mitigation

Shock Waves ◽  
2013 ◽  
Vol 23 (1) ◽  
pp. 1-4 ◽  
Author(s):  
A. Hadjadj ◽  
O. Sadot
Keyword(s):  
Blast Waves
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