裂纹扩展知识点

《ABAQUS6.9版本XFEM(扩展有限元)例子的详细图解step by step》帖子的问题汇总 已做出解答部分 1

Damage Stabilization

则不收敛。Damage Stabilization以就不需要Damage Stabilization

homogeous

2、Material模块中的操作的“3.赋予材料取向”时看不到“在part Plate中创建的4

allallbottom

top和fixZ

bottom, top和fixZ,个人感觉后三个集合只是面或

集合过滤

3、集合bdisp是只包含db

db

bdisp这个集合只包含db

bdsip

P2

4、关于参考点的问题

bottom在x

荷是施加在点bdisp点上。

1bdisp的运动一致。因为在x方向上的载

束

直接将底部的x

③个人认为加这个参考点的作用是为了以后输出加载点的位移和反力用的。就是那个历史输出请求2.

参考点跟底面是一起运动的。之所以定义这么一个参考点是为了后面场输出变量用的

④那个参

load的边界条件里面不

移。之所以定义这么一个参考点是为了后面场输出变量用的。

1方向上的载荷直接加载bottom

CAE手册。

5、以上我们主要讨论的是Benchmark手册中的例题1.19.1。咱们能否再讨论一下例题1.19.2

1.19

2-4

,这样比较好理解。裂纹长了

1.19.2-3上可以看出

6、xfem

XFEM

册中的例题2

initiation and

propagation of a crack along an arbitrary, mesh-independent, solution-dependent path

7、我也一直在用XFEM知wylxl2001

Cohesive Element的时候好像遇到过。XFEM

8

9

Drucker prager

设置xfem以及interaction是maxps

Damage, Traction separation laws

xfem

材料模型而改用像混凝土损伤塑性模型Drucker prager模型等是不是就无法实现其扩

xfem

abaqus扩展有限元的关键是不是就是

10、这个abaqus扩展有限元的关键是不是就是设置xfem以及interaction以及求解控制的相关设

XFEM

的是maxps

个是分开位移Maxpe11

initial

2个损伤Initiation

Set CRITERION=DUCTILE to specify a damage initiation criterion based on the ductile failure strain.

Set CRITERION=FLD to specify a damage initiation criterion based on a forming limit diagram.

Set CRITERION=FLSD to specify a damage initiation criterion based on a forming limit stress diagram.

Set CRITERION=HASHIN to specify damage initiation criteria based on the Hashin analysis.

Set CRITERION=HYSTERESIS ENERGY to specify damage initiation criteria based on the inelastic hysteresis energy dissipated per stabilized cycle in a low-cycle fatigue analysis.

Set CRITERION=JOHNSON COOK to specify a damage initiation criterion based on the Johnson-Cook failure strain.

Set CRITERION=MAXE to specify a damage initiation criterion based on the maximum

nominal strain for cohesive elements.

Set CRITERION=MAXS to specify a damage initiation criterion based on the maximum

nominal stress criterion for cohesive elements.

Set CRITERION=MAXPE to specify a damage initiation criterion based on the maximum principal strain for enriched elements.

Set CRITERION=MAXPS to specify a damage initiation criterion based on the maximum principal stress criterion for enriched elements.

Set CRITERION=MK to specify a damage initiation criterion based on a Marciniak-Kuczynski analysis.

Set CRITERION=MSFLD to specify a damage initiation criterion based on the Müschenborn and Sonne forming limit diagram.

Set CRITERION=QUADE to specify a damage initiation based on the quadratic separation-interaction criterion for cohesive elements.

Set CRITERION=QUADS to specify a damage initiation based on the quadratic traction-interaction criterion for cohesive elements.

Set CRITERION=SHEAR to specify a damage initiation criterion based on the shear failure strain.

xfem的initial损伤定义吧?

xfem

11、看了这个帖

c3d4

C3D8

crack

crack后

abaqus还有其他方法模拟我上述的想

Cohesive element或者surface-based cohesive

12

XFEM不考虑奇异性。 13、请问lz

crackprop_modeI_xfem_cpe4.inp中下列语句*initial condition,type=enrichment 400,1,abc, 1.0, 0.0 400,2,abc, 1.0,-1.0 400,3,abc,-1.0,-1.0 400,4,abc,-1.0, 0.0 401,1,abc, 1.0,-1.0

401,2,abc, 1.0,-2.0 401,3,abc,-1.0,-2.0 401,4,abc,-1.0,-1.0 402,1,abc, 1.0,-2.0 402,2,abc, 1.0,-3.0 402,3,abc,-1.0,-3.0 402,4,abc,-1.0,-2.0

400

2、3、4

lz这个关键词语句的生成对应CAE

401

402

1、

12345

Element number or element set label.

Relative position of the node forming the element connectivity. Name of the enriched feature specified on the *ENRICHMENT option. Value of first signed distance function.

Value of second signed distance function. Leave this entry blank if only the

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