ansys铆接接触分析，求大神们解答疑惑
我的是两个铆钉铆接两块蒙皮。建模和划分网格的命令流见附件。两块蒙皮，一端全约束，一端受向外的拉力100MPA。分析铆钉和蒙皮连接处的应力情况。这些天来被铆钉和蒙皮之间的接触折磨，所以跪求大神们解决... 我设的单元类型是：蒙皮solid185，铆钉solid92，target170，contact174.网格：蒙皮是HEX/SWEEP，铆钉是TET/FREE。但接触设置时，真心不知道怎么设置。 铆钉杆和铆孔之间是：rough, bond,还是no separation? 铆钉头和尾与两块蒙皮的面接触是又该怎么选择？
之前试了很多次，求解总是出现问题。要不就是求解出来的等效应力太大，不符合实际情况；要么就是有一块蒙皮没有应力变化。 不知道到底哪里出问题了....由于刚学习这个ansys不久，实在找不到解决的方向。
请大神们能给出详细解决办法，如果好心的大神们，能发给我解决这个问题的命令流，小弟不甚感激！
急求解决办法！！！
/PREP7
BLOCK,0,100,0,30,0,2,
BLOCK,60,160,0,30,0,-1.5,
FLST,2,1,8
FITEM,2,70,15,2
WPAVE,P51X
CYL4,0,0,2, , , ,-3.5
CYL4,20,0,2, , , ,-3.5
FLST,2,2,6,ORDE,2
FITEM,2,1
FITEM,2,-2
FLST,3,2,6,ORDE,2
FITEM,3,3
FITEM,3,-4
VSBV,P51X,P51X
FLST,2,1,8
FITEM,2,70,15,0
WPAVE,P51X
NUMCMP,ALL
NUMCMP,ALL
K, ,65.74,15,-1.5,
K, ,68,15,-1.5,
K, ,68,15,3.5,
K, ,70,15,3.5,
K, ,70,15,-3,
L, 41, 42
L, 42, 43
L, 43, 44
L, 44, 45
!*
LARC,41,45,42,6.8,
FLST,2,5,4
FITEM,2,57
FITEM,2,61
FITEM,2,60
FITEM,2,59
FITEM,2,58
AL,P51X
FLST,2,1,5,ORDE,1
FITEM,2,21
FLST,8,2,3
FITEM,8,44
FITEM,8,45
VROTAT,P51X, , , , , ,P51X, ,360, ,
FLST,2,4,6,ORDE,2
FITEM,2,3
FITEM,2,-6
VADD,P51X
NUMCMP,ALL
WPCSYS,-1,0
KPLOT
K, ,85.74,15,-1.5,
K, ,88,15,-1.5,
K, ,88,15,3.5,
K, ,90,15,3.5,
K, ,90,15,-3,
L, 55, 56
L, 56, 57
L, 57, 58
L, 58, 59
!*
LARC,55,59,56,6.8,
FLST,2,5,4
FITEM,2,85
FITEM,2,89
FITEM,2,88
FITEM,2,87
FITEM,2,86
AL,P51X
FLST,2,1,5,ORDE,1
FITEM,2,37
FLST,8,2,3
FITEM,8,58
FITEM,8,59
VROTAT,P51X, , , , , ,P51X, ,360, ,
FLST,2,4,6,ORDE,2
FITEM,2,4
FITEM,2,-7
VADD,P51X
NUMCMP,ALL
VPLOT
FLST,2,1,8
FITEM,2,70,15,2
WPAVE,P51X
CYL4,0,0,3, ,2
CYL4,20,0,3, ,2
FLST,2,2,5,ORDE,2
FITEM,2,53
FITEM,2,-54
VEXT,P51X, , ,0,0,1.5,,,,
FLST,2,2,6,ORDE,2
FITEM,2,3
FITEM,2,5
VADD,P51X
FLST,2,2,6,ORDE,2
FITEM,2,4
FITEM,2,6
VADD,P51X
NUMCMP,ALL
WPCSYS,-1,0
ET,1,SOLID185
!*
ET,2,SOLID95
!*
ET,3,TARGE170
!*
ET,4,CONTA174
!*
!*
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,1,,7.24e10
MPDATA,PRXY,1,,0.33
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,2,,7.1e10
MPDATA,PRXY,2,,0.33
FLST,5,2,6,ORDE,2
FITEM,5,1
FITEM,5,-2
CM,_Y,VOLU
VSEL, , , ,P51X
CM,_Y1,VOLU
CMSEL,S,_Y
!*
CMSEL,S,_Y1
VATT, 1, , 1, 0
CMSEL,S,_Y
CMDELE,_Y
CMDELE,_Y1
!*
FLST,5,2,6,ORDE,2
FITEM,5,3
FITEM,5,-4
CM,_Y,VOLU
VSEL, , , ,P51X
CM,_Y1,VOLU
CMSEL,S,_Y
!*
CMSEL,S,_Y1
VATT, 2, , 2, 0
CMSEL,S,_Y
CMDELE,_Y
CMDELE,_Y1
!*
ESIZE,0.9,0,
TYPE, 1
MAT, 1
REAL,
ESYS, 0
SECNUM,
!*
FLST,5,2,6,ORDE,2
FITEM,5,1
FITEM,5,-2
CM,_Y,VOLU
VSEL, , , ,P51X
CM,_Y1,VOLU
CHKMSH,'VOLU'
CMSEL,S,_Y
!*
VSWEEP,_Y1
!*
CMDELE,_Y
CMDELE,_Y1
CMDELE,_Y2
!*
ESIZE,0.7,0,
TYPE, 2
MAT, 2
REAL,
ESYS, 0
SECNUM,
!*
MSHAPE,1,3D
MSHKEY,0
!*
FLST,5,2,6,ORDE,2
FITEM,5,3
FITEM,5,-4
CM,_Y,VOLU
VSEL, , , ,P51X
CM,_Y1,VOLU
CHKMSH,'VOLU'
CMSEL,S,_Y
!*
VMESH,_Y1
!*
CMDELE,_Y
CMDELE,_Y1
CMDELE,_Y2
!*
!*
TCHG,95,92,0
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