模型中的裂纹在画网格后为什么消失了
画了一个波形板，有一些裂纹，但在画完网格后这些裂纹消失了，请问哪位大侠知道这是什么情况原模型
C:\Documents and Settings\Administrator\5.jpg
画网格后
C:\Documents and Settings\Administrator\7.jpg
裂纹问题没有做过，不太清楚，不过你可以参考相应的例子比对一下，比如VM143就是裂纹的例子
另外在附一个裂纹的分析实例
!12.2均布拉力作用下含裂纹板的应力强度因子计算
! 本程序来源于邢静忠等编著的《ANSYS分析实例与工程应用》，机械工业出版社（2004年）
! (1) 定义将二维SOLID45模型通过添加1/4位置的中间节点转化成SOLID95裂纹尖端单元的宏程序
*CREATE,FRACT,MAC
!MACRO TO CREATE 3D SOLID95 CRACK TIP ELEMENTS FROM 3D SOLID45 ELEMENTS
! MAKE A COMPONENT CONTAINING THE CRACK TIP NODES (CRACKTIP)
! THE CRACK TIP IS BETWEEN NODES K AND O
! SET ELEMENT TYPE TO POINT TO SOLID95
! SET ARG1 TON(THE TYPE OF THE ELEMENTS AROUND THE CRACK TIP)
/NOPR
NSEL,ALL
*GET,N,NODE,,NUM,MAX
CMSEL,S,CRACKTIP
ESLN
*GET,ELMAX,ELEM,,NUM,MAX
*DO,IEL,1,ELMAX
ELMI=IEL
*IF,ELMI,LE,0,EXIT
*GET,ELTYPE,ELEM,ELMI,ATTR,TYPE
*IF,ELTYPE,NE,ARG1,CYCLE
N3 = NELEM(ELMI,3)
*IF,NSEL(N3),LE,0,CYCLE
N7 = NELEM(ELMI,7)
*IF,NSEL(N7),LE,0,CYCLE
N1 = NELEM(ELMI,1)
N2 = NELEM(ELMI,2)
N5 = NELEM(ELMI,5)
N6 = NELEM(ELMI,6)
X3 = 0.75*NX(N3)
Y3 = 0.75*NY(N3)
Z3 = 0.75*NZ(N3)
X= 0.25*NX(N2) + X3
Y= 0.25*NY(N2) + Y3
Z= 0.25*NZ(N2) + Z3
N= N + 1
N10 = N
N,N10,X,Y,Z
X= 0.25*NX(N1) + X3
Y= 0.25*NY(N1) + Y3
Z= 0.25*NZ(N1) + Z3
N= N + 1
N12= N
N,N12,X,Y,Z
X7 = 0.75*NX(N7)
Y7 = 0.75*NY(N7)
Z7 = 0.75*NZ(N7)
X= 0.25*NX(N6) + X7
Y= 0.25*NY(N6) + Y7
Z= 0.25*NZ(N6) + Z7
N= N + 1
N14 = N
N,N14,X,Y,Z
X= 0.25*NX(N5) + X7
Y= 0.25*NY(N5) + Y7
Z= 0.25*NZ(N5) + Z7
N= N + 1
N16 = N
N,N16,X,Y,Z
N4=N3
N8=N7
NSEL,ALL
TYPE,3
EN,ELMI,N1,N2,N3,N4,N5,N6,N7,N8
EMORE,0,N10,0,N12,0,N14,0,N16
EMORE,
*ENDDO
CMSEL,U,CRACKTIP
NUMMRG,NODE
NSEL,ALL
ESEL,ALL
/GOPR
*END
! (2) 在前处理模块设置工程选项,分析类型,单元类型和材料参数
FINISH
/CLEAR,NOSTART
/FILENAME,EX12.2
/PREP7
SMRT,OFF
/TITLE, EX12.2, STRESS INTENSITY - CRACK IN FINITE WIDTH PLATE(SOLID95)
C*** BROWN AND SRAWLEY, ASTM SPECIAL TECHNICAL PUBLICATION NO. 410.
/COM, ****** CRACK IN 3-DIMENSIONS USING SOLID45 AND SOLID95
ANTYPE,STATIC
ET,1,SOLID45
ET,2,SOLID45
ET,3,SOLID95
MP,EX,1,207E3
MP,NUXY,1,0.3
! (3) 在柱坐标系下定义节点
CSYS,1
N,1
NGEN,9,20,1
N,11,20.32
N,171,20.32,180
FILL,11,171,7,31,20
CSYS,0
FILL,1,11,9,2,1,9,20,3 为3
N,15,101.6
N,75,101.6,127
FILL,15,75,2,35,20
N,155,-25.4,127
FILL,75,155,3,95,20
N,172,-25.4
FILL,155,172,5,177,-1,,,0.15
FILL,11,15,3,,,7,20,3
NGEN,2,200,1,177,,,,6.35
! (4) 定义单元连接
/View,1,1,1,1
/PNUM,NODE,1
E,2,22,1,1,202,222,201,201
EGEN,8,20,-1
E,2,3,23,22,202,203,223,222
EGEN,8,20,-1
EGEN,9,1,-8
EGEN,5,1,73,78
E,171,151,173,172,371,351,373,372
E,151,131,174,173,351,331,374,373
E,131,132,175,174,331,332,375,374
EGEN,3,1,-1
E,134,135,155,177,334,335,355,377
TYPE,2
EMODIF,1
*REPEAT,8,1
NUMMRG,NODE
! (5) 定义位移约束
NSEL,S,LOC,X,0
NSEL,R,LOC,Y,0
CM,CRACKTIP,NODE
/NERR,0
FRACT,2
/NERR,DEFA
/OUTPUT
OUTPR,,ALL
OUTPR,VENG,ALL
NSEL,S,LOC,X,-25.4
DSYM,SYMM,X
NSEL,S,LOC,X,0,101.6
NSEL,R,LOC,Y,0
DSYM,SYMM,Y
NSEL,ALL
D,ALL,UZ
NSEL,S,LOC,Y,127
SF,ALL,PRES,-0.0038902
NSEL,ALL
ESEL,ALL
/VIEW,1,0,0,1
EPLOT
FINISH
! (6) 在求解模块开始求解
/OUTPUT,SCRATCH
/SOLU
SOLVE
FINISH
/OUTPUT
! (7) 在后处理模块中,定义路径后计算应力强度因子
/POST1
ETABLE,SENE,SENE
ETABLE,VOLU,VOLU
C*** IN POST1 DETERMINE KI (STRESS INTENSITY FACTOR) USING KCALC
PATH,KI1,3,,48
PPATH,1,1
PPATH,2,406
PPATH,3,162
KCALC,,,1
*GET,KI1,KCALC,,K,1
! (8) 定义完成J积分计算的宏程序JIN1
! *********************************************************************
! **************************J-INTEGRAL USER FILE ******************
! *******************************************************************
! ***NOTE:- IN GENERAL USAGE, THE USER FILE WOULD BE AVAILABLE IN THE
! LOCAL DIRECTORY RATHER THAN BEING CREATED IN THE INPUT
! *******************************************************************
*CREATE,JIN1
STINFC
SEXP,W,SENE,VOLU,1,-1
PATH,JINT,4,50,48
PPATH,1,ARG1
PPATH,2,ARG2
PPATH,3,ARG3
PPATH,4,ARG4
PDEF,W,ETAB,W
PCALC,INTG,J,W,YG
*GET,JA,PATH,,LAST,J
PDEF,CLEAR
PVECT,NORM,NX,NY,NZ
PDEF,INTR,SX,SX
PDEF,INTR,SY,SY
PDEF,INTR,SXY,SXY
PCALC,MULT,TX,SX,NX
PCALC,MULT,C1,SXY,NY
PCALC,ADD,TX,TX,C1
PCALC,MULT,TY,SXY,NX
PCALC,MULT,C1,SY,NY
PCALC,ADD,TY,TY,C1
*GET,DX,PATH,,LAST,S
DX=DX/100
PCALC,ADD,XG,XG,,,,-DX/2
PDEF,INTR,UX1,UX
PDEF,INTR,UY1,UY
PCALC,ADD,XG,XG,,,,DX
PDEF,INTR,UX2,UX
PDEF,INTR,UY2,UY
PCALC,ADD,XG,XG,,,,-DX/2
C=(1/DX)
PCALC,ADD,C1,UX2,UX1,C,-C
PCALC,ADD,C2,UY2,UY1,C,-C
PCALC,MULT,C1,TX,C1
PCALC,MULT,C2,TY,C2
PCALC,ADD,C1,C1,C2
PCALC,INTG,J,C1,S
*GET,JB,PATH,,LAST,J
JINT=2*(JA-JB)
PDEF,CLEAR
*END
! (9) 在后处理模块用J积分确定应力强度因子KI
C**************** IN POST1 DETERMINE KI FROM J-INTEGRAL
CON1=207E3/(1-(0.3*0.3))
*ULIB,JIN1
*USE,STINFC,4,45,125,164
KI2=SQRT(CON1*JINT)
*STATUS,KI1
*STATUS,KI2
! (10) 定义数组,将结果保存到这些数组
*DIM,LABEL,CHAR,2,2
*DIM,VALUE,,2,3
LABEL(1,1) = 'BY DISP ','BY J-'
LABEL(1,2) = 'EXTRP ','INT'
*VFILL,VALUE(1,1),DATA,0.03561,0.03561
*VFILL,VALUE(1,2),DATA,KI1,KI2
*VFILL,VALUE(1,3),DATA,ABS(KI1/0.03561),ABS(KI2/0.03561)
SAVE,TABLE_1
FINISH
! (11) 改用PLANE82单元重新计算
/CLEAR, NOSTART
/FILENAME,EX12.2B
/PREP7
SMRT,OFF
/TITLE, EX12.2B, FRACTURE MECHANIC - CRACK IN A FINITE WIDTH PLATE(PLANE82)
/COM, ****** CRACK IN 2-DIMENSIONS USING 2-D PLANE82 ******
ET,1,PLANE82,,,2
MP,EX,1,207E3
MP,NUXY,1,0.3
! (12) 定义关键点和线,对称位移条件后将面划分为面单元
K,1
K,2,101.5
K,3,101.6,127
K,4,-25.4,127
K,5,-25.4
L,1,2
L,2,3
LESIZE,2,,,4
L,3,4
LESIZE,3,,,4
L,4,5,
LESIZE,4,,,6,.2
L,5,1
ESIZE,,5
KSCON,1,3.81,1,8
AL,1,2,3,4,5
DL,1,1,SYMM
DL,4,1,SYMM
SFL,3,PRES,-0.0038902
AMESH,1
OUTPR,ALL
FINISH
! (13) 进入求解模块求解
/OUTPUT,SCRATCH
/SOLU
SOLVE
FINISH
/OUTPUT
! (14) 在后处理模块显示计算结果
/POST1
ETABLE,SENE,SENE
ETABLE,VOLU,VOLU
C*** IN POST1 DETERMINE KI (STRESS INTENSITY FACTOR) USING KCALC
NSEL,S,LOC,Y,0
NSEL,R,LOC,X,0
*GET,NOD1,NODE,,NUM,MIN
NSEL,A,LOC,Y
NSEL,R,LOC,X,-0.127,-3.683
*GET,NOD2,NODE,,NUM,MIN
NSEL,A,LOC,Y
NSEL,R,LOC,X,-3.683,-3.937
*GET,NOD3,NODE,,NUM,MIN
NSEL,ALL
PATH,KI2,3,,48
PPATH,1,NOD1
PPATH,2,NOD2
PPATH,3,NOD3
KCALC,,,1
*GET,KI1,KCALC,,K,1
! (15) 由J积分确定应力强度因子KI
C**************** IN POST1 DETERMINE KI FROM J-INTEGRAL
CSYS,1
NSEL,S,LOC,X,12.7,20.32
NSEL,R,LOC,Y,-1,1
*GET,NOD4,NODE,,NUM,MAX
NSEL,S,LOC,X,12.7,20.32
NSEL,R,LOC,Y,35,55
*GET,NOD5,NODE,,NUM,MAX
NSEL,S,LOC,X,12.7,20.32
NSEL,R,LOC,Y,120,145
*GET,NOD6,NODE,,NUM,MAX
NSEL,S,LOC,X,12.7,20.32
NSEL,R,LOC,Y,179,181
*GET,NOD7,NODE,,NUM,MIN
NSEL,ALL
CSYS,0
*USE,STINFC,NOD4,NOD5,NOD6,NOD7
CON1=207E3/(1-(0.3*0.3))
KI2=SQRT(CON1*JINT)
*STATUS,KI1
*STATUS,KI2
! (16) 定义数组,将结果保存到这些数组
*DIM,LABEL,CHAR,2,2
*DIM,VALUE,,2,3
LABEL(1,1) = 'BY DISP ','BY J-'
LABEL(1,2) = 'EXTRP ','INT'
*VFILL,VALUE(1,1),DATA,0.03561,0.03561
*VFILL,VALUE(1,2),DATA,KI1,KI2
*VFILL,VALUE(1,3),DATA,ABS(KI1/0.03561),ABS(KI2/0.03561)
SAVE,TABLE_2
! (17) 从数据库文件中恢复计算结果后,将其输出到结果文件EX12_2
RESUME,TABLE_1
/COM
/OUT,EX12_2,out
/COM,------------------- EX12.2 RESULTS COMPARISON --------------
/COM,
/COM, | TARGET | ANSYS | RATIO
/COM,
/COM,USING SOLID95 AND SOLID45 (3-D ANALYSIS)
*VWRITE,LABEL(1,1),LABEL(1,2),VALUE(1,1),VALUE(1,2),VALUE(1,3)
(1X,A8,A8,' ',F10.5,'',F10.5,' ',1F5.3)
/NOPR
RESUME,TABLE_2
/GOPR
/COM,
/COM,USING PLANE82 (2-D ANALYSIS)
*VWRITE,LABEL(1,1),LABEL(1,2),VALUE(1,1),VALUE(1,2),VALUE(1,3)
(1X,A8,A8,' ',F10.5,'',F10.5,' ',1F5.3)
/COM,-----------------------------------------------------------
/OUT
FINISH
*LIST,EX12_2,out
画网格前
http://forum.vibunion.com/data/attachment/album/201011/22/1704595rnjo41d4qtq4724.jpg
画网格后
http://forum.vibunion.com/data/attachment/album/201011/22/170501s21d1c2qccciks5m.jpg
本帖最后由 Chelsea 于 2010-11-22 18:48 编辑
请上传图片，粘贴的话只有你自己能够看到，别人是看不到的
我发现好多人都不会上传图片，给大家介绍一下，方法如下
页:
[1]