!PLASTIC

Definition of plastic material

!PLASTIC must be defined together with !ELASTIC.

Parameter

YIELD        = MISES (Default), Mohr-Coulomb, DRUCKER-PRAGER, USER
HARDEN       = BILINEAR (Default), MULTILINEAR, SWIFT, RAMBERG-OSGOOD,
KINEMATIC, COMBINED
DEPENDENCIES = 0 (Default)/1
INFINITESIMAL    When specified, infinitesimal deformation is assumed

** 2nd line or later **

In case of YIELD = MISES (Default)

** In case of HARDEN = BILINEAR (Default) **

(2nd line) YIELD0, H

** In case of HARDEN = MULTILINEAR **

(2nd line) YIELD, PSTRAIN, Temperature
(3rd line) YIELD, PSTRAIN, Temperature

...continues

** In case of HARDEN = SWIFT **

(2nd line) $\epsilon$0, K, n

** In case of HARDEN = RAMBERG-OSGOOD **

(2nd line) $\epsilon$0, D, n

** In case of HARDEN = KINEMATIC **

(2nd line) YIELD0, C

** In case of HARDEN = COMBINED **

(2nd line) YIELD0, H, C

In case of YIELD = Mohr-Coulomb or Drucker-Prager

** In case of HARDEN = BILINEAR(Default) **

(2nd line) c, $\phi$, H, $\psi$

** In case of HARDEN = MULTILINEAR **

(2nd line) $\phi$, $\psi$
(3nd line) c, PSTRAIN
(4th line) c, PSTRAIN
...continues

HARDEN =others will be disregarded, becomes the default (BILINEAR).

Parameter Name	Attributions	Contents
YIELD0	R	Initial yield stress
H	R	Hardening factor
PSTRAIN	R	Plastic strain
YIELD	R	Yield stress
\(\varepsilon0, K, n\)	R	\(\overline{\sigma} = k\left( \varepsilon_{0} + \overline{\varepsilon} \right)^{n}\)
\(\varepsilon0, D, n\)	R	\(\varepsilon = \frac{\sigma}{E} + \varepsilon_{0}\left( \frac{\sigma}{D} \right)^{n}\)
\(\phi\)	R	Angle of internal friction
\(\psi\)	R	Dilatancy angle (Default: same value as \(\phi\))
c	R	Cohesion
C	R	Linear motion hardening factor
Temperature	R	Temperature (required when DEPENDENCIES = 1)
v1, v2...v10	R	Material constant

** In the case of YIELD= USER **

(2nd Line or later) v1, v2, v3, v4, v5, v6, v7, v8, v9, v10

Example of Use

!PLASTIC, YIELD=MISES, HARDEN=MULTILINEAR, DEPENDENCIES=1
276.0, 0.0, 20.
296.0, 0.0018, 20.
299.0, 0.0053, 20.
303.0, 0.008, 20.
338.0, 0.0173, 20.
372.0, 0.0271, 20.
400.0, 0.037, 20.
419.0, 0.0471, 20.
437.0, 0.0571, 20.
450.0, 0.0669, 20.
460.0, 0.0767, 20.
469.0, 0.0867, 20.
477.0, 0.0967, 20.
276.0, 0.0, 100.
276.0, 0.0018, 100.
282.0, 0.0053, 100.
295.0, 0.008, 100.
330.0, 0.0173, 100.
370.0, 0.0271, 100.
392.0, 0.037, 100.
410.0, 0.0471, 100.
425.0, 0.0571, 100.
445.0, 0.0669, 100.
450.0, 0.0767, 100.
460.0, 0.0867, 100.
471.0, 0.0967, 100.
128.0, 0.0, 400.
208.0, 0.0018, 400.
243.0, 0.0053, 400.
259.0, 0.008, 400.
309.0, 0.0173, 400.
340.0, 0.0271, 400.
366.0, 0.037, 400.
382.0, 0.0471, 400.
396.0, 0.0571, 400.
409.0, 0.0669, 400.
417.0, 0.0767, 400.
423.0, 0.0867, 400.
429.0, 0.0967, 400.

The work hardening coefficient will be calculated by inserting the data from the above input data, regarding the specified temperature or plastic strain. It is necessary to input the same PSTRAIN array for each temperature.