On critical conditions for shear band formation at high strain rates

1984 ◽  
Vol 18 (5) ◽  
pp. 443-448 ◽  
Author(s):  
R.J. Clifton ◽  
J. Duffy ◽  
K.A. Hartley ◽  
T.G. Shawki
Keyword(s):  
Shear Band ◽  
High Strain ◽  
Critical Conditions ◽  
Strain Rates ◽  
Shear Band Formation ◽  
High Strain Rates ◽  
Band Formation

Explicit and implicit methods for shear band modeling at high strain rates

2018 ◽  
Vol 63 (4) ◽  
pp. 615-629
Author(s):  
Luc Berger-Vergiat ◽  
Xiaocui Chen ◽  
Haim Waisman
Keyword(s):  
Shear Band ◽  
High Strain ◽  
Strain Rates ◽  
Implicit Methods ◽  
High Strain Rates

A Mechanism for Shear Band Formation in the High Strain-Rate Torsion Test

1990 ◽  
Vol 57 (4) ◽  
pp. 836-844 ◽  
Author(s):  
Timothy J. Burns
Keyword(s):  
Shear Band ◽  
High Strain Rate ◽  
Strain Rate ◽  
Plastic Flow ◽  
Moving Boundary ◽  
High Strain ◽  
Numerical Study ◽  
Torsion Test ◽  
Shear Band Formation ◽  
Band Formation

A numerical study of a one-dimensional model of the high strain-rate torsion test shows that a moving boundary of rigid unloading, starting from the ends of the thin-walled tubular specimen, is a plausible mechanism for adiabatic shear band formation during the test. Even though the dimensionless thermal diffusivity parameter is very small, the moving boundary is due to heat transfer from the specimen through its ends, which are assumed to be isothermal heat sinks. The mathematical model is based on a physical model of thermoelastic-plastic flow and a phenomenological Arrhenius model for the plastic flow surface. The numerical technique used is the semi-discretization method of lines.

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