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[APDL] Error regarding insufficiently constrained condition
 
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debabrata.podder
User


Joined: 21 Feb 2013
Posts: 51
Location: NIT Meghalaya, India

PostPosted: Fri Jun 28, 2019 5:10 am  Reply with quote

Dear Ansys users,
Recently we are modeling one composite concrete block. The apdl is as under:

/PREP7
!*
ET,1,SOLID65
!*
ET,2,link8
R,2,0.6163
!*
!*
MPTEMP,,,,,,,,
MPTEMP,1,0
!MPDATA,EX,1,,32770
MPDATA,EX,1,,33489
MPDATA,PRXY,1,,0.2
TB,MELA,1,1,4,
TBTEMP,0
TBPT,,0.00043,14.4
TBPT,,0.0008,25
TBPT,,0.0012,35
TBPT,,0.0029,48
TB,CONC,1,1,9,
TBTEMP,0
TBDATA,,0.2,1,4.8,-1,,
TBDATA,,,,,,,
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,2,,2e5
MPDATA,PRXY,2,,0.3
SECTYPE, 1, BEAM, RECT, concretesection, 0
SECOFFSET, CENT
SECDATA,100,100,0,0,0,0,0,0,0,0,0,0
!*
!*
!SECTYPE,2,LINK, ,link 8
!SECDATA,0.6163,
!SECCONTROL,0,0
!*
!*
K, 1, 62.05906657, 36.00000000, 36.00000000
K, 2, 87.58413736, 12.06648866, 36.81104642
L, 1,2
K, 3, 36.00000000, 36.00000000, 55.86620697
K, 4, 1.21408423, 39.84678575, 55.48897545
L, 3,4
K, 5, 36.00000000, 63.67773359, 36.00000000
K, 6, 59.25909952, 87.92964917, 45.79075484
L, 5,6
K, 7, 60.29872682, 36.00000000, 36.00000000
K, 8, 34.97306172, 15.68032531, 49.06604408
L, 7,8
K, 9, 36.00000000, 36.00000000, 36.00000000
K, 10, 60.48572097, 57.85986430, 23.85109877
L, 9,10
K, 11, 36.00000000, 36.00000000, 55.68267100
K, 12, 56.03385903, 56.02587017, 35.12521454
L, 11,12
K, 13, 38.45292972, 36.00000000, 36.00000000
K, 14, 40.40695426, 13.13024754, 62.42264579
L, 13,14
K, 15, 36.00000000, 36.00000000, 45.21991024
K, 16, 13.04638935, 10.43432090, 38.54699409
L, 15,16
K, 17, 41.33240793, 58.14254315, 40.81377156
K, 18, 14.77200407, 56.01702114, 63.50798014
L, 17,18
K, 19, 51.89406676, 36.00000000, 36.00000000
K, 20, 66.10916543, 59.10661329, 13.88630759
L, 19,20
K, 21, 36.00000000, 36.00000000, 36.00000000
K, 22, 58.60027652, 33.91249449, 9.35661767
L, 21,22
K, 23, 42.30278884, 36.00000000, 61.73091298
K, 24, 16.16445167, 31.15461248, 84.49732574
L, 23,24
K, 25, 51.73707406, 46.02070811, 36.00000000
K, 26, 71.51817551, 46.23139845, 64.87323389
L, 25,26
K, 27, 36.00000000, 36.00000000, 36.00000000
K, 28, 56.67107922, 19.06201271, 58.60112985
L, 27,28
K, 29, 39.05453100, 56.63593433, 36.00000000
K, 30, 28.88737400, 32.84273711, 59.56931660
L, 29,30
K, 31, 36.00000000, 36.00000000, 38.19213216
K, 32, 43.94541838, 57.29269958, 11.57463282
L, 31,32
K, 33, 36.00000000, 36.00000000, 57.04621900
K, 34, 7.52704236, 54.67136732, 65.14996662
L, 33,34
K, 35, 54.45964491, 36.00000000, 36.00000000
K, 36, 38.42673074, 22.72833277, 64.13909224
L, 35,36
K, 37, 59.85135702, 48.95803463, 36.00000000
K, 38, 81.44895221, 76.48717924, 36.83070978
L, 37,38
K, 39, 36.00000000, 45.50277352, 48.50202110
K, 40, 48.59136881, 20.56213165, 69.58333544
L, 39,40
K, 41, 36.00000000, 36.00000000, 36.00000000
K, 42, 20.04607641, 32.95248711, 4.99701648
L, 41,42
K, 43, 42.41379745, 44.19380456, 55.95377782
K, 44, 47.73593552, 58.54064319, 87.43143764
L, 43,44
K, 45, 59.62442225, 36.22402424, 36.00000000
K, 46, 53.60328391, 23.95213400, 68.22028248
L, 45,46
K, 47, 36.00000000, 55.29412867, 36.00000000
K, 48, 2.37492060, 47.15185028, 41.29691779
L, 47,48
K, 49, 63.32244645, 36.30675697, 36.00000000
K, 50, 28.73415169, 38.26733931, 31.01943953
L, 49,50
K, 51, 36.00000000, 58.61528816, 36.00000000
K, 52, 35.27318027, 90.97715329, 22.68904892
L, 51,52
K, 53, 36.00000000, 36.00000000, 36.00000000
K, 54, 17.46801575, 59.26480860, 54.44760798
L, 53,54
K, 55, 36.00000000, 36.00000000, 36.00000000
K, 56, 27.61745395, 13.47296544, 10.55858424
L, 55,56
K, 57, 36.00000000, 36.00000000, 57.74541076
K, 58, 13.56098850, 12.65719544, 44.45615803
L, 57,58
K, 59, 36.00000000, 36.00000000, 36.00000000
K, 60, 15.02344168, 28.31105872, 62.94186673
L, 59,60
K, 61, 36.00000000, 60.39600248, 56.00372440
K, 62, 26.75021989, 93.88073392, 60.27154918
L, 61,62
K, 63, 45.09980611, 36.00000000, 46.26278105
K, 64, 77.30019903, 22.96021664, 42.00851901
L, 63,64
K, 65, 36.00000000, 36.00000000, 56.73284455
K, 66, 9.69778917, 12.91105808, 56.42549072
L, 65,66
K, 67, 36.00000000, 36.00000000, 60.97013045
K, 68, 57.44452755, 48.59062815, 36.34071063
L, 67,68
K, 69, 36.00000000, 45.66445073, 36.00000000
K, 70, 31.61935900, 44.07977276, 70.68859726
L, 69,70
K, 71, 36.00000000, 36.00000000, 36.00000000
K, 72, 32.28813105, 58.17767763, 62.82112309
L, 71,72
K, 73, 36.00000000, 36.00000000, 63.73658393
K, 74, 15.05906074, 64.03055831, 64.61114866
L, 73,74
K, 75, 38.59879430, 55.65632255, 41.91161169
K, 76, 22.37054987, 72.47113386, 67.96744028
L, 75,76
K, 77, 36.00000000, 37.97307959, 58.26663566
K, 78, 52.75465425, 68.03799692, 51.91192820
L, 77,78
K, 79, 36.00000000, 36.00000000, 36.00000000
K, 80, 12.46297017, 60.78334511, 28.46381846
L, 79,80
K, 81, 36.00000000, 36.00000000, 36.00000000
K, 82, 40.21492272, 64.23063399, 15.74498257
L, 81,82
K, 83, 36.00000000, 36.00000000, 40.48722239
K, 84, 58.44757528, 14.05831057, 25.00598766
L, 83,84
K, 85, 35.80270687, 36.00000000, 36.00000000
K, 86, 53.31907567, 22.59850554, 63.17676895
L, 85,86
K, 87, 56.60864245, 36.00000000, 36.00000000
K, 88, 67.54178531, 5.76238208, 49.82580377
L, 87,88
K, 89, 36.00000000, 48.18475924, 47.12447749
K, 90, 64.44219295, 68.49854443, 48.96615909
L, 89,90
K, 91, 58.80692880, 36.00000000, 39.48202642
K, 92, 81.26293988, 36.60642248, 66.32154613
L, 91,92
K, 93, 36.00000000, 55.07667337, 38.24381898
K, 94, 57.89360046, 27.87655580, 40.65708711
L, 93,94
K, 95, 54.19238163, 44.19221525, 36.00000000
K, 96, 83.92429596, 26.05051503, 39.44847550
L, 95,96
K, 97, 52.03044437, 36.00000000, 36.00000000
K, 98, 22.76382807, 38.31494695, 16.94465453
L, 97,98
K, 99, 59.66220598, 55.79614226, 36.00000000
K, 100, 34.74227690, 33.11433416, 45.46217290
L, 99,100
K, 101, 36.00000000, 36.00000000, 36.00000000
K, 102, 58.95211936, 15.64411567, 19.15250195
L, 101,102
K, 103, 36.00000000, 39.47709491, 39.57339419
K, 104, 50.25234218, 17.74677655, 16.12847990
L, 103,104
K, 105, 36.00000000, 35.29792394, 62.26838723
K, 106, 34.16318465, 3.12676666, 75.93011291
L, 105,106
K, 107, 36.00000000, 36.00000000, 36.00000000
K, 108, 63.59534011, 22.24294918, 52.56021608
L, 107,108
K, 109, 37.38693481, 36.00000000, 36.00000000
K, 110, 31.28939008, 8.35367373, 15.42086999
L, 109,110
K, 111, 39.40416562, 50.14653457, 57.60528224
K, 112, 13.58453541, 37.87051688, 37.41503494
L, 111,112
K, 113, 36.00000000, 49.71119116, 36.00000000
K, 114, 16.25184941, 77.18767668, 44.94725051
L, 113,114
K, 115, 36.00000000, 36.00000000, 36.00000000
K, 116, 15.03265828, 9.78482532, 45.90632109
L, 115,116
K, 117, 64.29707763, 36.00000000, 52.96981764
K, 118, 41.11339679, 17.27776847, 34.61239437
L, 117,118
K, 119, 36.00000000, 38.07355469, 36.00000000
K, 120, 33.14292924, 45.20732231, 1.85404114
L, 119,120
K, 121, 45.16675873, 36.00000000, 57.19131862
K, 122, 36.14004229, 56.31668166, 30.15891516
L, 121,122
K, 123, 36.00000000, 47.35969294, 36.00000000
K, 124, 68.91293249, 36.88602271, 30.33951356
L, 123,124
K, 125, 36.00000000, 36.00000000, 36.00000000
K, 126, 40.20421987, 1.26439578, 35.12688225
L, 125,126
K, 127, 36.00000000, 36.00000000, 38.57233691
K, 128, 56.10255286, 15.23820627, 18.82808991
L, 127,128
K, 129, 52.09371296, 59.60868864, 38.03680650
K, 130, 45.16311219, 27.69029012, 50.61387329
L, 129,130
K, 131, 36.00000000, 49.28264443, 43.39931467
K, 132, 33.53862127, 64.86975370, 12.15857781
L, 131,132
K, 133, 36.00000000, 57.65699759, 42.12176248
K, 134, 58.70506066, 54.63193081, 15.65802897
L, 133,134
K, 135, 36.00000000, 36.00000000, 36.00000000
K, 136, 60.97108682, 44.55321843, 58.98450081
L, 135,136
K, 137, 36.00000000, 36.00000000, 36.00000000
K, 138, 37.62297451, 49.50325863, 68.24946449
L, 137,138
K, 139, 48.06616782, 47.90972255, 48.87541802
K, 140, 71.43144214, 51.82870767, 23.11293538
L, 139,140
K, 141, 36.00000000, 45.28646542, 36.00000000
K, 142, 66.80924273, 61.87467365, 35.21138694
L, 141,142
K, 143, 52.29385703, 50.50453887, 42.27985596
K, 144, 56.76336596, 75.54410327, 66.32239545
L, 143,144
K, 145, 53.09922664, 36.00000000, 55.72931395
K, 146, 82.46235567, 46.16933070, 39.62368243
L, 145,146
K, 147, 36.00000000, 36.00000000, 36.00000000
K, 148, 54.98268162, 57.96107800, 55.55425405
L, 147,148
K, 149, 36.00000000, 39.73041350, 63.18579551
K, 150, 64.86233416, 37.69056204, 82.87855238
L, 149,150
K, 151, 53.36477113, 55.62517294, 36.00000000
K, 152, 65.91041395, 24.87839429, 47.05633071
L, 151,152
K, 153, 41.46334530, 43.60181208, 54.30129578
K, 154, 35.17154735, 21.03858549, 28.29525640
L, 153,154
K, 155, 36.00000000, 36.00000000, 54.32136763
K, 156, 32.67805953, 66.38167882, 37.26504025
L, 155,156
K, 157, 58.23705080, 36.00000000, 36.00000000
K, 158, 81.93491349, 24.95257760, 59.26726804
L, 157,158
K, 159, 36.00000000, 45.75799011, 35.48260358
K, 160, 4.85250770, 56.74710866, 47.06159305
L, 159,160
K, 161, 35.39392599, 36.00000000, 61.30603958
K, 162, 4.94999921, 49.51647419, 50.56023818
L, 161,162
K, 163, 39.41874354, 36.89952486, 36.00000000
K, 164, 32.23414456, 44.74534940, 69.34403357
L, 163,164
K, 165, 49.42835416, 57.71096210, 52.42034225
K, 166, 53.88433502, 80.00626403, 25.81087502
L, 165,166
K, 167, 55.59754667, 54.79170378, 39.09091909
K, 168, 21.05100796, 55.16914414, 44.69397200
L, 167,168
K, 169, 36.00000000, 58.42190613, 51.32533023
K, 170, 46.90660678, 57.59367083, 84.57228430
L, 169,170
K, 171, 36.00000000, 61.03520094, 51.94702728
K, 172, 62.04794848, 60.89068731, 75.32401374
L, 171,172
K, 173, 47.70176442, 53.00328514, 36.00000000
K, 174, 25.80564583, 77.45761347, 23.85315611
L, 173,174
K, 175, 36.00000000, 36.00000000, 36.00000000
K, 176, 26.20311486, 18.56871411, 64.72579527
L, 175,176
K, 177, 54.58371977, 36.00000000, 42.47469356
K, 178, 37.99504447, 7.10134631, 31.76564752
L, 177,178
K, 179, 36.00000000, 36.00000000, 36.00000000
K, 180, 59.11303068, 23.63597331, 59.19307346
L, 179,180
K, 181, 53.83399255, 36.00000000, 63.23539541
K, 182, 61.96648685, 49.82663802, 32.12773369
L, 181,182
K, 183, 36.00000000, 36.00000000, 48.65184415
K, 184, 18.33618234, 60.33500385, 30.74103363
L, 183,184
K, 185, 36.00000000, 36.00000000, 36.90967473
K, 186, 16.89411188, 60.44989338, 53.10126986
L, 185,186
K, 187, 57.19243286, 36.00000000, 36.00000000
K, 188, 60.30650239, 16.29143928, 7.24456216
L, 187,188
K, 189, 36.00000000, 35.18800567, 36.00000000
K, 190, 63.33164902, 56.89492339, 38.60589421
L, 189,190
K, 191, 44.63680120, 60.20099037, 57.62664664
K, 192, 70.31375535, 66.60889789, 80.53150959
L, 191,192
K, 193, 47.69523882, 36.00000000, 36.00000000
K, 194, 75.38213623, 27.93946116, 55.83591251
L, 193,194
BLOCK,,100,,100,,100,
FLST,5,97,4,ORDE,2
FITEM,5,1
FITEM,5,-97
LSEL,R, , ,P51X
CM,fibres,LINE
CMSEL,A,fibres
VSEL,R, , , 1
CM,concrete,VOLU
CMSEL,A,concrete
/MREP,EPLOT
TYPE, 2
MAT, 2
REAL, 2
ESYS, 0
!SECNUM, 2
!*
FLST,5,97,4,ORDE,2
FITEM,5,1
FITEM,5,-97
CM,_Y,LINE
LSEL, , , ,P51X
CM,_Y1,LINE
CMSEL,,_Y
!*
LESIZE,_Y1,5, , , , , , ,1
!*
!*
FLST,2,97,4,ORDE,2
FITEM,2,1
FITEM,2,-97
LMESH,P51X
TYPE, 1
MAT, 1
REAL,
ESYS, 0
SECNUM, 1
!*
!*
ESIZE,5,0,
CM,_Y,VOLU
VSEL, , , , 1
CM,_Y1,VOLU
CHKMSH,'VOLU'
CMSEL,S,_Y
!*
!*
VCLEAR,_Y1
VSWEEP,_Y1
!*
!*
NUMMRG,NODE, , , ,LOW
FINISH
/SOL
NLGEOM,ON ! Nonlinear geometry on
AUTOTS,ON ! Auto time-search on
LNSRCH,ON ! Line search on
NEQIT,1000 ! 1000 iteration maximum


FLST,2,1,5,ORDE,1
FITEM,2,4
DA,P51X,ALL,0
/GO
!*
FLST,2,1,5,ORDE,1
FITEM,2,3
!*
/GO
SFA,P51X,1,PRES,30

NSUBST,100,100,50
OUTRES,ERASE
OUTRES,ALL,ALL
RESCONTRL,DEFINE,ALL,ALL,0
/STATUS,SOLU
SOLVE
FINISH

Some error message is coming as under:
"There is at least 1 small equation solver pivot term (e.g., at the UZ
degree of freedom of node 139). Please check for an insufficiently
constrained model."

Kindly see the problem.
_________________
Debabrata Podder(PhD)
Assistant Professor
NIT Meghalaya
India
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