寻求帮助：通过载荷位移曲线求得极限载荷

warmmonger

载荷位移曲线得不到下降段，请有心人指点

fini
/clear
finish
/config,nres,5000
/PREP7
*SET,a,50  
*SET,b,30
*SET,c,30
*SET,t,5.85
*SET,pi,1500
ET,1,plane42
ET,2,TARGE169   
ET,3,CONTA172
   
KEYOPT,1,3,2  
KEYOPT,3,2,1   
KEYOPT,3,4,2
!R,1,t,
MPTEMP,,,,,,,,  
MPTEMP,1,0
MPDATA,EX,1,,2.0e5
MPDATA,PRXY,1,,0.3  
TB,MISO,1,1,12,  
TBTEMP,0
TBPT,,0.004,800
TBPT,,0.008967261,810
TBPT,,0.012014347,830
TBPT,,0.016681906,850
TBPT,,0.023626595,870
TBPT,,0.033700259,890
TBPT,,0.040239732,900
TBPT,,0.04798976,910
TBPT,,0.080406842,940
TBPT,,0.095012381,950
TBPT,,0.209504796,1000
TBPT,,0.3,0

K,1,c,0,0,
K,2,a,0,0,  
K,3,a,0,0,
k,4,a,b,0
K,5,-a,b,0,
K,6,-a,0,0,
K,7,-a,0,0,
K,8,-c,0,0,
k,10,-a,-b,0
k,11,a,-b,0

a,1,2,4,5,6,8
a,7,10,11,3,1,8
ESIZE,2,0
AMESH,all   

! Generate the target surface   
LSEL,S,,,5,  
CM,_TARGET,LINE
TYPE,2  
MAT,1   
REAL,3        !
NSLL,S,1
ESLN,S,0
ESURF   
alls
! Generate the contact surface  
LSEL,S,,,11
CM,_CONTACT,LINE
TYPE,3  
MAT,1         !
NSLL,S,1
ESLN,S,0
ESURF   
ALLSEL  
ESEL,ALL
! Generate the target surface   
LSEL,S,,,1  
CM,_TARGET,LINE
TYPE,2  
MAT,1   
REAL,3        !
NSLL,S,1
ESLN,S,0
ESURF   
alls
! Generate the contact surface  
LSEL,S,,,10
CM,_CONTACT,LINE
TYPE,3  
MAT,1         !
NSLL,S,1
ESLN,S,0
ESURF   
ALLSEL  
ESEL,ALL

eplot
allsel
finish
/SOLU
dl,8,,all
sfl,3,pres,-pi
  
ANTYPE,0
NLGEOM,on
arclen,on
outres,all,all
ntop=node(0,b,0)
SOLVE
FINISH

/POST26
nsol,2,ntop,u,y
prod,3,1,,,load,,,pi
*get,uy2,vari,2,extrem,vmin
prvar,2,3
/axlab,x,deflection(mm)
/axlab,y,total,load(MPa)
/grid,1
/xrange,0,0.3
/yrange,-500,pi
xvar,2
plvar,3

warmmonger

请版主帮忙看一下

warmmonger

怎么没有帮忙的？不要让帖子沉了啊

mkk123

研究，学习中……

guiyang

观望，期待高手的出现。

chcalo

应该跟单元种类，材料类型有关吧，LZ最后解决了吗