DISLOCATION MECHANICS OF IRON AND COPPER IN HIGH RATE DEFORMATION TESTS

2009 ◽  
Author(s):  
Ronald W. Armstrong ◽  
Werner Arnold ◽  
Frank J. Zerilli ◽  
Mark Elert ◽  
Michael D. Furnish ◽  
...  
Keyword(s):  
High Rate ◽  
Dislocation Mechanics ◽  
Deformation Tests ◽  
High Rate Deformation

Dislocation mechanics of copper and iron in high rate deformation tests

2009 ◽  
Vol 105 (2) ◽  
pp. 023511 ◽  
Author(s):  
Ronald W. Armstrong ◽  
Werner Arnold ◽  
Frank J. Zerilli
Keyword(s):  
High Rate ◽  
Dislocation Mechanics ◽  
Deformation Tests ◽  
High Rate Deformation

scholarly journals Bertram Hopkinson's pioneering work and the dislocation mechanics of high rate deformations and mechanically induced detonations

2014 ◽  
Vol 372 (2015) ◽  
pp. 20130181 ◽  
Author(s):  
Ronald W. Armstrong
Keyword(s):  
Constitutive Relations ◽  
Shear Banding ◽  
High Rate ◽  
Hopkinson Pressure Bar ◽  
Isentropic Compression ◽  
Impact Tests ◽  
Dislocation Mechanics ◽  
Pressure Bar ◽  
High Rate Deformation

Bertram Hopkinson was prescient in writing of the importance of better measuring, albeit better understanding, the nature of high rate deformation of materials in general and, in particular, of the importance of heat in initiating detonation of explosives. This report deals with these subjects in terms of post-Hopkinson crystal dislocation mechanics applied to high rate deformations, including impact tests, Hopkinson pressure bar results, Zerilli–Armstrong-type constitutive relations, shock-induced deformations, isentropic compression experiments, mechanical initiation of explosive crystals and shear banding in metals.

Effect of high rate deformation induced precipitation hardening on the failure of aluminium rivets

1989 ◽  
Vol 24 (2) ◽  
pp. 599-608 ◽  
Author(s):  
Vincent K. S. Choo ◽  
Per G. Reinhall ◽  
Saeid Ghassaei
Keyword(s):  
Precipitation Hardening ◽  
High Rate ◽  
High Rate Deformation

High-rate deformation and fracture of steel 09G2S

2014 ◽  
Vol 49 (6) ◽  
pp. 666-672 ◽  
Author(s):  
Vl. Vas. Balandin ◽  
Vl. Vl. Balandin ◽  
A. M. Bragov ◽  
L. A. Igumnov ◽  
A. Yu. Konstantinov ◽  
...  
Keyword(s):  
High Rate ◽  
Steel 09G2s ◽  
Deformation And Fracture ◽  
High Rate Deformation

Dislocation Mechanics of Extremely High Rate Deformations in Iron and Tantalum

2021 ◽  
pp. 1-30
Author(s):  
Mu'Tasem Shehadeh ◽  
Pascale El Ters ◽  
Ronald W. Armstrong ◽  
Werner Arnold
Keyword(s):  
Strain Rate ◽  
Weak Shock ◽  
Rate Sensitivity ◽  
High Rate ◽  
Dislocation Dynamic ◽  
Dislocation Generation ◽  
High Deformation ◽  
Rate Analysis ◽  
Dislocation Mechanics ◽  
Dynamic Plasticity

Abstract High strain rate simulations were performed using the multiscale dislocation dynamic plasticity (MDDP) method to calculate different rise times and load durations in mimicking high deformation rate shock or isentropic (ramp) testing of a-iron and tantalum crystals. Focus for both types of loading on both materials was on the inter-relationship between the (dislocation-velocity-related) strain rate sensitivity and the (time-dependent) evolution of dislocation density. The computations are compared with model thermal activation strain rate analysis (TASRA), phonon drag and dislocation generation predictions. The overall comparison of simulated tests and previous experimental measurements shows that the imposition of a rise time even as small as 0.2 ns preceding plastic relaxation via the MDDP method is indicative of relatively weak shock behavior.

High-Rate Deformation and Fracture of 15Kh2NMFA Steel under Impact Loading at Normal and Elevated Temperatures

2020 ◽  
Vol 65 (3) ◽  
pp. 420-427
Author(s):  
G. I. Kanel ◽  
G. V. Garkushin ◽  
A. S. Savinykh ◽  
S. V. Razorenov ◽  
S. A. Atroshenko
Keyword(s):  
Impact Loading ◽  
Elevated Temperatures ◽  
High Rate ◽  
Deformation And Fracture ◽  
15Kh2nmfa Steel ◽  
High Rate Deformation

Structural and temporal features of high-rate deformation of metals

2017 ◽  
Vol 62 (2) ◽  
pp. 102-105 ◽  
Author(s):  
N. S. Selyutina ◽  
Yu. V. Petrov
Keyword(s):  
High Rate ◽  
Temporal Features ◽  
High Rate Deformation
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