标签:总结 END abaqus plasticity lines STEP 导入 import Data
Abaqus 隐式分析转显示分析
导入模板
导入模型一般模板如下,其中update=NO表示import后的模型采用原始构型,yes表示采用新的基准。
只有在考虑集合非线性的情况下才能update=yes
若采用NO则位移在导入前后保持连续,且材料状态可以导入。
若采用YES则单元属性及节点坐标均可更改,但材料状态不会导入。
隐式转显式(由实例进行装配)
- 显式部分
*HEADING
*PART, NAME=Part-1
Node, element, section, set, and surface definitions
*END PART
*ASSEMBLY, NAME=Assembly-1
*INSTANCE, NAME=i1, PART=Part-1
<positioning data>
Additional set and surface definitions (optional)
*END INSTANCE
Assembly level set and surface definitions
…
*END ASSEMBLY
*MATERIAL, NAME=mat1
*ELASTIC
Data lines to define linear elasticity
*PLASTIC
Data lines to define Mises plasticity
*DENSITY
Data line to define the density of the material
…
*BOUNDARY
Data lines to define boundary conditions
*STEP
*STATIC
…
*RESTART, WRITE, FREQUENCY=n
*END STEP
- 显式部分
*HEADING
Part definitions (optional)
*ASSEMBLY, NAME=Assembly-1
*INSTANCE, INSTANCE=i1, LIBRARY=oldjob-name
Additional set and surface definitions (optional)
*IMPORT, STEP=step, INCREMENT=increment, STATE=YES, UPDATE=NO
*END INSTANCE
Additional part instance definitions (optional)
Assembly level set and surface definitions
*END ASSEMBLY
**
*** Optionally redefine the material block
**
*MATERIAL, NAME=mat1
*ELASTIC
Data lines to redefine linear elasticity
*PLASTIC
Data lines to redefine Mises plasticity
…
*BOUNDARY
Data lines to redefine boundary conditions
*STEP
*DYNAMIC, EXPLICIT
…
*END STEP
隐式转显式(直接导入装配件)
- 隐式部分
*HEADING
…
*MATERIAL, NAME=mat1
*ELASTIC
Data lines to define linear elasticity
*PLASTIC
Data lines to define Mises plasticity
*DENSITY
Data line to define the density of the material
…
*BOUNDARY
Data lines to define boundary conditions
*STEP
*STATIC
…
*RESTART, WRITE, FREQUENCY=n
*END STEP
- 显式部分
*HEADING
*IMPORT, STEP=step, INCREMENT=increment, STATE=YES, UPDATE=NO
Data lines to specify element sets to be imported
*IMPORT ELSET
Data lines to specify element set definitions to be imported
*IMPORT NSET
Data lines to specify node set definitions to be imported
**
*** Optionally redefine the material block
**
*MATERIAL, NAME=mat1
*ELASTIC
Data lines to redefine linear elasticity
*PLASTIC
Data lines to redefine Mises plasticity
…
*BOUNDARY
Data lines to redefine boundary conditions
*STEP
*DYNAMIC, EXPLICIT
…
*END STEP
导入限制
节点导入与节点定义
- 新的节点定义需要基于变形后的节点,无论update=yes or no
- 只有导入的单元
- 若update=no则,所导入的单元、节点均可以改变坐标
集合导入
材料信息导入
update=no,state=yes的情况下,才可以导入材料状态。只有如下所示的情况才能导入材料状态,其他情况仅能导入应力。
- linear elasticity,
- Mises plasticity (including the kinematic hardening models),
- extended Drucker-Prager plasticity,
- crushable foam plasticity,
- Mohr-Coulomb plasticity,
- critical state (clay) plasticity,
- cast iron plasticity,
- concrete damaged plasticity,
- hyperelasticity (including Mullins effect),
- hyperfoam,
- viscoelasticity,
- traction-separation response with damage for cohesive elements,
- damage for ductile metals,
- damage for fiber-reinforced composites,
- connector behavior,
- materials defined in user subroutines
UMAT
andVUMAT
, and - materials defined using the parallel rheological framework for nonlinear viscoelastic-elastoplastic behavior.
初始条件导入
允许导入的初始条件包括以下部分:
Initial condition | Material state imported |
---|---|
Hardening | No |
Relative density | No |
Rotational velocity | Yes or No |
Solution-dependent state variables | No |
Stress | No |
Velocity | Yes or No |
Void ratio | No |
温度应力无法导入,此时预应力需要通过用户材料子程序的方式施加。
边界条件
导入前后的边界条件需要保持一致,例:导入前施加位移为0.1,则导入后施加的位移要从0.1开始
import材料子程序
前后两步中sdv变量要一一对应,才能正确传递数值。
需要注意的是:后一步的sdv个数会自动选为前一步已经使用的sdv的个数,而不是定义的*Depvar的个数。
标签:总结,END,abaqus,plasticity,lines,STEP,导入,import,Data 来源: https://www.cnblogs.com/structurer/p/11605827.html
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