!PLASTIC¶

Plastik materialni aniqlash

!PLASTIC aniqlanganda, ayni !MATERIAL ichida !ELASTIC ham birga aniqlanishi kerak.

Parametrlar¶

YIELD        = MISES (sukut bo‘yicha), Mohr-Coulomb, DRUCKER-PRAGER, USER
HARDEN       = BILINEAR (sukut bo‘yicha), MULTILINEAR, SWIFT, RAMBERG-OSGOOD, KINEMATIC, COMBINED
DEPENDENCIES = 0 (sukut bo‘yicha) / 1
INFINITESIMAL    ko‘rsatilsa, kichik deformatsiya farazi qo‘llanadi

** 2-qator va undan keyingi qatorlar **

`YIELD = MISES` bo‘lganda (sukut bo‘yicha)¶

** HARDEN = BILINEAR bo‘lganda (sukut bo‘yicha) **

(2-qator) YIELD0, H

** HARDEN = MULTILINEAR bo‘lganda **

(2-qator) YIELD, PSTRAIN, Temperature
(3-qator) YIELD, PSTRAIN, Temperature

...davomi

** HARDEN = SWIFT bo‘lganda **

(2-qator) ε0, K, n

** HARDEN = RAMBERG-OSGOOD bo‘lganda **

(2-qator) ε0, D, n

** HARDEN = KINEMATIC bo‘lganda **

(2-qator) YIELD0, C

** HARDEN = COMBINED bo‘lganda **

(2-qator) YIELD0, H, C

`YIELD =` Mohr-Coulomb yoki Drucker-Prager bo‘lganda¶

** HARDEN = BILINEAR bo‘lganda (sukut bo‘yicha) **

(2-qator) c, $\phi$, H, $\psi$

** HARDEN = MULTILINEAR bo‘lganda **

(2-qator) $\phi$, $\psi$
(3-qator) c, PSTRAIN
(4-qator) c, PSTRAIN
...davomi

HARDEN = ning boshqa qiymatlari e’tiborga olinmaydi va sukut bo‘yicha qiymat (BILINEAR) qo‘llanadi.

O‘zgaruvchi nomi	Atribut	Tavsif
YIELD0	R	Boshlang‘ich oquvchanlik kuchlanishi
H	R	Mustahkamlanish koeffitsiyenti
PSTRAIN	R	Plastik deformatsiya
YIELD	R	Oquvchanlik kuchlanishi
\(\varepsilon0, K, n\)	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	Ichki ishqalanish burchagi
\(\psi\)	R	Dilatansiya burchagi (sukut bo‘yicha: \(\phi\) bilan bir xil qiymat)
c	R	Kogeziya
C	R	Chiziqli kinematik mustahkamlanish koeffitsiyenti
Temperature	R	Harorat (DEPENDENCIES=1 bo‘lganda talab qilinadi)
v1, v2...v10	R	Material konstantalari

** YIELD= USER bo‘lganda **

(2-qator va undan keyingi qatorlar) v1, v2, v3, v4, v5, v6, v7, v8, v9, v10

Foydalanish misoli¶

!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.

Ishlovda mustahkamlanish koeffitsiyenti yuqoridagi kirish ma’lumotlaridan belgilangan harorat yoki plastik deformatsiya bo‘yicha interpolyatsiya qilish orqali hisoblanadi. Har bir harorat qiymati uchun bir xil PSTRAIN massivi kiritilishi kerak.