AFC
Asymmetrical Friction Connection
Theory
The AFC model is a bilinear hardening model with an unloading stiffness differs from the initial stiffness. The term
AFC comes from "asymmetric friction connection" which is a type of energy dissipaters. But this model can be used in
other applications.
Syntax
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| material AFCS (1) (2) (3) (4) (5)
material AFC02 (1) (2) (3) (4) (5)
# (1) int, unique tag
# (2) double, elastic modulus
# (3) double, yield stress
# (4) double, hardening modulus
# (5) double, unloading modulus
material AFC (1) (2) (3) (4) (5) (6) (7) (8)
material AFC01 (1) (2) (3) (4) (5) (6) (7) (8)
# (1) int, unique tag
# (2) double, elastic modulus
# (3) double, tension yield stress
# (4) double, tension hardening modulus
# (5) double, tension unloading modulus
# (6) double, compression yield stress
# (7) double, compression hardening modulus
# (8) double, compression unloading modulus
|
History Variable Layout
| location |
value |
initial_history(0) |
load_sign |
initial_history(1) |
max_strain |
initial_history(2) |
reverse_strain |
initial_history(3) |
start_strain |
initial_history(4) |
start_stress |
initial_history(5) |
end_strain |
initial_history(6) |
end_stress |
AFC02 is a wrapper of AFC01. It provides a symmetric behavior while AFC01 provides an asymmetric behavior.
Examples
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| material AFC02 1 100 10 5 200
materialTest1D 1 1E-3 150 25 125 100 100 200 100 300 125 150
exit
|
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| material AFC01 1 100 10 5 200 20 2 300
materialTest1D 1 1E-3 150 25 125 100 100 200 100 300 125 150
exit
|
| Text Only |
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| material AFC02 1 100 10 .1 500
materialTest1D 1 1E-2 20 40 60 80 100 120 140 160 80
exit
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