A cylinder is loaded with a uniformly distributed line load along the top edge. Critical buckling load is determined. Different meshes and differences between Belytschko-Tsay shell (elform 2), S/R Hughes-Liu shell (elform 6), Belytschko-Wong-Chiang shell (elform 10) and fully integrated shell (elform 16) can be studied.
*BOUNDARY_SPC_SET *CONTROL_IMPLICIT_BUCKLE *CONTROL_IMPLICIT_GENERAL *CONTROL_IMPLICIT_SOLUTION *CONTROL_IMPLICIT_EIGENVALUE *CONTROL_SHELL *CONTROL_TERMINATION *DATABASE_BINARY_D3PLOT *DEFINE_CURVE *ELEMENT_SHELL *END *HOURGLASS *KEYWORD *LOAD_NODE_SET *MAT_ELASTIC *NODE *PART *SECTION_SHELL *SET_NODE_LIST_TITLE *TITLE
*TITLE
Buckling of a Thin Walled Cylinder Under Compression
*CONTROL_IMPLICIT_GENERAL
1 0.100000 2 1 2
*CONTROL_IMPLICIT_SOLUTION
2 11 15 0.001000 0.010000 0.0 0.900000 1.000000
2 1 1 2
0 1 0.0 1 2
*CONTROL_IMPLICIT_BUCKLE
3
*CONTROL_TERMINATION
1.000000 0 0.0 0.0 0.0
*CONTROL_SHELL
20.00000 0 0 0 2 1 1 1
0.0 0
*DATABASE_BINARY_D3PLOT
0.010000
*PART
1 1 1 0 1
*SECTION_SHELL
1 2 0.0 0 1 0.0 0 1
0.100000 0.100000 0.100000 0.100000 0 0.0
*MAT_ELASTIC
1 0.0100001.0000e+07 0.300000 0.0 0.0 0.0
*HOURGLASS
1 4 0.0 0 0.0 0.0 0.0 0.0
*SET_NODE_LIST_TITLE
bottom nodes
1 0.0 0.0 0.0 0.0
1 31 61 91 121 151 181 211
241 271 301 331 361 391 421 451
481 511 541 571 601 631 661 691
721 751 781 811 841 871 901 931
961 991 1021 1051 1081 1111 1141 1171
1201 1231 1261 1291 1321 1351 1381 1411
1441 1471 1501 1531 1561 1591 1621 1651
1681 1711 1741 1771 1801 1831 1861 1891
1921 1951 1981 2011 2041 2071 2101 2131
2161 2191 2221 2251
*SET_NODE_LIST_TITLE
top nodes
2 0.0 0.0 0.0 0.0
30 60 90 120 150 180 210 240
270 300 330 360 390 420 450 480
510 540 570 600 630 660 690 720
750 780 810 1200 1230 1260 1290 1320
1350 1380 1410 1440 1470 1500 1530 1560
1590 1620 1650 1680 1710 1740 1920 1950
1980 2010 2040 2070 2100 2130 2160 2190
2220 2250 2280 840 870 900 930 960
990 1020 1050 1080 1110 1140 1170 1770
1800 1830 1860 1890
*BOUNDARY_SPC_SET
1 0 1 1 1 1 1 1
*BOUNDARY_SPC_SET
2 0 1 1 0 0 0 0
*DEFINE_CURVE
1 0 0.0 0.0 0.0 0.0
0.0 0.0
1.00000000 13.15789474
*LOAD_NODE_SET
2 3 1 -1.000000
*ELEMENT_SHELL
*NODE
*END
