: NAFEMS BENCHMARK EXAMPLE 3DNLG-6 BUCKLING OF A FLAT PLATE WHEN SUBJECTED TO IN-PLANE SHEAR *PREPRINT, MODEL=YES *RESTART,WRITE,FREQ=999 ** *NODE, NSET=NALL 1,0,0,-6.25 2,62.5,0,-6.25 3,125,0,-6.25 4,187.5,0,-6.25 5,250,0,-6.25 6,312.5,0,-6.25 7,375,0,-6.25 8,437.5,0,-6.25 9,500,0,-6.25 10,562.5,0,-6.25 11,625,0,-6.25 12,687.5,0,-6.25 13,750,0,-6.25 14,812.5,0,-6.25 15,875,0,-6.25 16,937.5,0,-6.25 17,1000,0,-6.25 18,0,62.5,-6.25 19,62.5,62.5,-5.835866 20,125,62.5,-5.472689 21,187.5,62.5,-5.201767 22,250,62.5,-5.047688 23,312.5,62.5,-5.015548 24,375,62.5,-5.092603 25,437.5,62.5,-5.253151 26,500,62.5,-5.464764 27,562.5,62.5,-5.694111 28,625,62.5,-5.911375 29,687.5,62.5,-6.093114 30,750,62.5,-6.223982 31,812.5,62.5,-6.297709 32,875,62.5,-6.317448 33,937.5,62.5,-6.295202 34,1000,62.5,-6.25 35,0,125,-6.25 36,62.5,125,-5.47044 37,125,125,-4.780768 38,187.5,125,-4.254809 39,250,125,-3.938477 40,312.5,125,-3.84478 41,375,125,-3.955931 42,437.5,125,-4.230653 43,500,125,-4.613764 44,562.5,125,-5.045442 45,625,125,-5.468826 46,687.5,125,-5.835864 47,750,125,-6.111985 48,812.5,125,-6.279845 49,875,125,-6.341679 50,937.5,125,-6.319182 51,1000,125,-6.25 52,0,187.5,-6.25 53,62.5,187.5,-5.194337 54,125,187.5,-4.246515 55,187.5,187.5,-3.497476 56,250,187.5,-3.008455 57,312.5,187.5,-2.804792 58,375,187.5,-2.876533 59,437.5,187.5,-3.18404 60,500,187.5,-3.666101 61,562.5,187.5,-4.248614 62,625,187.5,-4.853225 63,687.5,187.5,-5.406268 64,750,187.5,-5.848281 65,812.5,187.5,-6.143313 66,875,187.5,-6.285943 67,937.5,187.5,-6.303272 68,1000,187.5,-6.25 69,0,250,-6.25 70,62.5,250,-5.033655 71,125,250,-3.918455 72,187.5,250,-2.994058 73,250,250,-2.329227 74,312.5,250,-1.965668 75,375,250,-1.915075 76,437.5,250,-2.158625 77,500,250,-2.648368 78,562.5,250,-3.310911 79,625,250,-4.054631 80,687.5,250,-4.781485 81,750,250,-5.403032 82,812.5,250,-5.857892 83,875,250,-6.125916 84,937.5,250,-6.233958 85,1000,250,-6.25 86,0,312.5,-6.25 87,62.5,312.5,-4.99649 88,125,312.5,-3.815089 89,187.5,312.5,-2.776984 90,250,312.5,-1.950082 91,312.5,312.5,-1.394055 92,375,312.5,-1.152427 93,437.5,312.5,-1.242673 94,500,312.5,-1.646935 95,562.5,312.5,-2.307246 96,625,312.5,-3.129119 97,687.5,312.5,-3.995531 98,750,312.5,-4.789908 99,812.5,312.5,-5.422822 100,875,312.5,-5.854517 101,937.5,312.5,-6.105425 102,1000,312.5,-6.25 103,0,375,-6.25 104,62.5,375,-5.072939 105,125,375,-3.923965 106,187.5,375,-2.843458 107,250,375,-1.890747 108,312.5,375,-1.141265 109,375,375,-0.67346 110,437.5,375,-0.54846 111,500,375,-0.788706 112,562.5,375,-1.363249 113,625,375,-2.186354 114,687.5,375,-3.132348 115,750,375,-4.064255 116,812.5,375,-4.868494 117,875,375,-5.484876 118,937.5,375,-5.921681 119,1000,375,-6.25 120,0,437.5,-6.25 121,62.5,437.5,-5.238336 122,125,437.5,-4.205925 123,187.5,437.5,-3.157025 124,250,437.5,-2.136424 125,312.5,437.5,-1.229152 126,375,437.5,-0.543342 127,437.5,437.5,-0.181058 128,500,437.5,-0.206436 129,562.5,437.5,-0.622018 130,625,437.5,-1.362114 131,687.5,437.5,-2.306719 132,750,437.5,-3.312718 133,812.5,437.5,-4.252967 134,875,437.5,-5.050684 135,937.5,437.5,-5.697672 136,1000,437.5,-6.25 137,0,500,-6.25 138,62.5,500,-5.45879 139,125,500,-4.603366 140,187.5,500,-3.653876 141,250,500,-2.637114 142,312.5,500,-1.638766 143,375,500,-0.784399 144,437.5,500,-0.205247 145,500,500,0 146,562.5,500,-0.205247 147,625,500,-0.784399 148,687.5,500,-1.638766 149,750,500,-2.637114 150,812.5,500,-3.653876 151,875,500,-4.603366 152,937.5,500,-5.45879 153,1000,500,-6.25 154,0,562.5,-6.25 155,62.5,562.5,-5.697672 156,125,562.5,-5.050684 157,187.5,562.5,-4.252967 158,250,562.5,-3.312718 159,312.5,562.5,-2.306719 160,375,562.5,-1.362114 161,437.5,562.5,-0.622018 162,500,562.5,-0.206436 163,562.5,562.5,-0.181058 164,625,562.5,-0.543342 165,687.5,562.5,-1.229152 166,750,562.5,-2.136424 167,812.5,562.5,-3.157025 168,875,562.5,-4.205925 169,937.5,562.5,-5.238336 170,1000,562.5,-6.25 171,0,625,-6.25 172,62.5,625,-5.921681 173,125,625,-5.484876 174,187.5,625,-4.868494 175,250,625,-4.064255 176,312.5,625,-3.132349 177,375,625,-2.186354 178,437.5,625,-1.363249 179,500,625,-0.788706 180,562.5,625,-0.54846 181,625,625,-0.67346 182,687.5,625,-1.141265 183,750,625,-1.890747 184,812.5,625,-2.843458 185,875,625,-3.923965 186,937.5,625,-5.072939 187,1000,625,-6.250001 188,0,687.5,-6.25 189,62.5,687.5,-6.105426 190,125,687.5,-5.854517 191,187.5,687.5,-5.422822 192,250,687.5,-4.789908 193,312.5,687.5,-3.995531 194,375,687.5,-3.129119 195,437.5,687.5,-2.307246 196,500,687.5,-1.646935 197,562.5,687.5,-1.242672 198,625,687.5,-1.152427 199,687.5,687.5,-1.394055 200,750,687.5,-1.950082 201,812.5,687.5,-2.776985 202,875,687.5,-3.815089 203,937.5,687.5,-4.996491 204,1000,687.5,-6.250001 205,0,750,-6.25 206,62.5,750,-6.233958 207,125,750,-6.125916 208,187.5,750,-5.857892 209,250,750,-5.403032 210,312.5,750,-4.781485 211,375,750,-4.054631 212,437.5,750,-3.310911 213,500,750,-2.648368 214,562.5,750,-2.158625 215,625,750,-1.915075 216,687.5,750,-1.965668 217,750,750,-2.329227 218,812.5,750,-2.994058 219,875,750,-3.918455 220,937.5,750,-5.033655 221,1000,750,-6.250001 222,0,812.5,-6.25 223,62.5,812.5,-6.303272 224,125,812.5,-6.285944 225,187.5,812.5,-6.143313 226,250,812.5,-5.848281 227,312.5,812.5,-5.406268 228,375,812.5,-4.853225 229,437.5,812.5,-4.248614 230,500,812.5,-3.666102 231,562.5,812.5,-3.184041 232,625,812.5,-2.876533 233,687.5,812.5,-2.804792 234,750,812.5,-3.008455 235,812.5,812.5,-3.497476 236,875,812.5,-4.246515 237,937.5,812.5,-5.194337 238,1000,812.5,-6.25 239,0,875,-6.25 240,62.5,875,-6.319182 241,125,875,-6.341679 242,187.5,875,-6.279845 243,250,875,-6.111985 244,312.5,875,-5.835863 245,375,875,-5.468825 246,437.5,875,-5.045442 247,500,875,-4.613763 248,562.5,875,-4.230653 249,625,875,-3.955931 250,687.5,875,-3.84478 251,750,875,-3.938477 252,812.5,875,-4.254809 253,875,875,-4.780768 254,937.5,875,-5.47044 255,1000,875,-6.25 256,0,937.5,-6.25 257,62.5,937.5,-6.295202 258,125,937.5,-6.317448 259,187.5,937.5,-6.297709 260,250,937.5,-6.223982 261,312.5,937.5,-6.093114 262,375,937.5,-5.911375 263,437.5,937.5,-5.694111 264,500,937.5,-5.464764 265,562.5,937.5,-5.253151 266,625,937.5,-5.092603 267,687.5,937.5,-5.015548 268,750,937.5,-5.047688 269,812.5,937.5,-5.201767 270,875,937.5,-5.472689 271,937.5,937.5,-5.835866 272,1000,937.5,-6.25 273,0,1000,-6.25 274,62.5,1000,-6.25 275,125,1000,-6.25 276,187.5,1000,-6.25 277,250,1000,-6.25 278,312.5,1000,-6.25 279,375,1000,-6.25 280,437.5,1000,-6.25 281,500,1000,-6.25 282,562.5,1000,-6.25 283,625,1000,-6.250001 284,687.5,1000,-6.250001 285,750,1000,-6.250001 286,812.5,1000,-6.25 287,875,1000,-6.25 288,937.5,1000,-6.25 289,1000,1000,-6.25 1001,0,0,6.25 1002,62.5,0,6.25 1003,125,0,6.25 1004,187.5,0,6.25 1005,250,0,6.25 1006,312.5,0,6.25 1007,375,0,6.25 1008,437.5,0,6.25 1009,500,0,6.25 1010,562.5,0,6.25 1011,625,0,6.25 1012,687.5,0,6.25 1013,750,0,6.25 1014,812.5,0,6.25 1015,875,0,6.25 1016,937.5,0,6.25 1017,1000,0,6.25 1018,0,62.5,6.25 1019,62.5,62.5,6.664134 1020,125,62.5,7.027311 1021,187.5,62.5,7.298233 1022,250,62.5,7.452312 1023,312.5,62.5,7.484452 1024,375,62.5,7.407397 1025,437.5,62.5,7.246849 1026,500,62.5,7.035236 1027,562.5,62.5,6.805889 1028,625,62.5,6.588625 1029,687.5,62.5,6.406886 1030,750,62.5,6.276018 1031,812.5,62.5,6.202291 1032,875,62.5,6.182552 1033,937.5,62.5,6.204798 1034,1000,62.5,6.25 1035,0,125,6.25 1036,62.5,125,7.02956 1037,125,125,7.719232 1038,187.5,125,8.245191 1039,250,125,8.561523 1040,312.5,125,8.65522 1041,375,125,8.544069 1042,437.5,125,8.269347 1043,500,125,7.886236 1044,562.5,125,7.454558 1045,625,125,7.031174 1046,687.5,125,6.664136 1047,750,125,6.388015 1048,812.5,125,6.220155 1049,875,125,6.158321 1050,937.5,125,6.180818 1051,1000,125,6.25 1052,0,187.5,6.25 1053,62.5,187.5,7.305663 1054,125,187.5,8.253485 1055,187.5,187.5,9.002524 1056,250,187.5,9.491545 1057,312.5,187.5,9.695208 1058,375,187.5,9.623467 1059,437.5,187.5,9.31596 1060,500,187.5,8.833899 1061,562.5,187.5,8.251386 1062,625,187.5,7.646775 1063,687.5,187.5,7.093732 1064,750,187.5,6.651719 1065,812.5,187.5,6.356687 1066,875,187.5,6.214057 1067,937.5,187.5,6.196728 1068,1000,187.5,6.25 1069,0,250,6.25 1070,62.5,250,7.466345 1071,125,250,8.581545 1072,187.5,250,9.505942 1073,250,250,10.170773 1074,312.5,250,10.534332 1075,375,250,10.584925 1076,437.5,250,10.341375 1077,500,250,9.851632 1078,562.5,250,9.189089 1079,625,250,8.445369 1080,687.5,250,7.718515 1081,750,250,7.096968 1082,812.5,250,6.642108 1083,875,250,6.374084 1084,937.5,250,6.266042 1085,1000,250,6.25 1086,0,312.5,6.25 1087,62.5,312.5,7.50351 1088,125,312.5,8.684911 1089,187.5,312.5,9.723016 1090,250,312.5,10.549918 1091,312.5,312.5,11.105945 1092,375,312.5,11.347573 1093,437.5,312.5,11.257327 1094,500,312.5,10.853065 1095,562.5,312.5,10.192754 1096,625,312.5,9.370881 1097,687.5,312.5,8.504469 1098,750,312.5,7.710092 1099,812.5,312.5,7.077178 1100,875,312.5,6.645483 1101,937.5,312.5,6.394575 1102,1000,312.5,6.25 1103,0,375,6.25 1104,62.5,375,7.427061 1105,125,375,8.576035 1106,187.5,375,9.656542 1107,250,375,10.609253 1108,312.5,375,11.358735 1109,375,375,11.82654 1110,437.5,375,11.95154 1111,500,375,11.711294 1112,562.5,375,11.136751 1113,625,375,10.313646 1114,687.5,375,9.367652 1115,750,375,8.435745 1116,812.5,375,7.631506 1117,875,375,7.015124 1118,937.5,375,6.578319 1119,1000,375,6.25 1120,0,437.5,6.25 1121,62.5,437.5,7.261664 1122,125,437.5,8.294075 1123,187.5,437.5,9.342975 1124,250,437.5,10.363576 1125,312.5,437.5,11.270848 1126,375,437.5,11.956658 1127,437.5,437.5,12.318942 1128,500,437.5,12.293564 1129,562.5,437.5,11.877982 1130,625,437.5,11.137886 1131,687.5,437.5,10.193281 1132,750,437.5,9.187282 1133,812.5,437.5,8.247033 1134,875,437.5,7.449316 1135,937.5,437.5,6.802328 1136,1000,437.5,6.25 1137,0,500,6.25 1138,62.5,500,7.04121 1139,125,500,7.896634 1140,187.5,500,8.846124 1141,250,500,9.862886 1142,312.5,500,10.861234 1143,375,500,11.715601 1144,437.5,500,12.294753 1145,500,500,12.5 1146,562.5,500,12.294753 1147,625,500,11.715601 1148,687.5,500,10.861234 1149,750,500,9.862886 1150,812.5,500,8.846124 1151,875,500,7.896634 1152,937.5,500,7.04121 1153,1000,500,6.25 1154,0,562.5,6.25 1155,62.5,562.5,6.802328 1156,125,562.5,7.449316 1157,187.5,562.5,8.247033 1158,250,562.5,9.187282 1159,312.5,562.5,10.193281 1160,375,562.5,11.137886 1161,437.5,562.5,11.877982 1162,500,562.5,12.293564 1163,562.5,562.5,12.318942 1164,625,562.5,11.956658 1165,687.5,562.5,11.270848 1166,750,562.5,10.363576 1167,812.5,562.5,9.342975 1168,875,562.5,8.294075 1169,937.5,562.5,7.261664 1170,1000,562.5,6.25 1171,0,625,6.25 1172,62.5,625,6.578319 1173,125,625,7.015124 1174,187.5,625,7.631506 1175,250,625,8.435745 1176,312.5,625,9.367651 1177,375,625,10.313646 1178,437.5,625,11.136751 1179,500,625,11.711294 1180,562.5,625,11.95154 1181,625,625,11.82654 1182,687.5,625,11.358735 1183,750,625,10.609253 1184,812.5,625,9.656542 1185,875,625,8.576035 1186,937.5,625,7.427061 1187,1000,625,6.249999 1188,0,687.5,6.25 1189,62.5,687.5,6.394574 1190,125,687.5,6.645483 1191,187.5,687.5,7.077178 1192,250,687.5,7.710092 1193,312.5,687.5,8.504469 1194,375,687.5,9.370881 1195,437.5,687.5,10.192754 1196,500,687.5,10.853065 1197,562.5,687.5,11.257328 1198,625,687.5,11.347573 1199,687.5,687.5,11.105945 1200,750,687.5,10.549918 1201,812.5,687.5,9.723015 1202,875,687.5,8.684911 1203,937.5,687.5,7.503509 1204,1000,687.5,6.249999 1205,0,750,6.25 1206,62.5,750,6.266042 1207,125,750,6.374084 1208,187.5,750,6.642108 1209,250,750,7.096968 1210,312.5,750,7.718515 1211,375,750,8.445369 1212,437.5,750,9.189089 1213,500,750,9.851632 1214,562.5,750,10.341375 1215,625,750,10.584925 1216,687.5,750,10.534332 1217,750,750,10.170773 1218,812.5,750,9.505942 1219,875,750,8.581545 1220,937.5,750,7.466345 1221,1000,750,6.249999 1222,0,812.5,6.25 1223,62.5,812.5,6.196728 1224,125,812.5,6.214056 1225,187.5,812.5,6.356687 1226,250,812.5,6.651719 1227,312.5,812.5,7.093732 1228,375,812.5,7.646775 1229,437.5,812.5,8.251386 1230,500,812.5,8.833898 1231,562.5,812.5,9.315959 1232,625,812.5,9.623467 1233,687.5,812.5,9.695208 1234,750,812.5,9.491545 1235,812.5,812.5,9.002524 1236,875,812.5,8.253485 1237,937.5,812.5,7.305663 1238,1000,812.5,6.25 1239,0,875,6.25 1240,62.5,875,6.180818 1241,125,875,6.158321 1242,187.5,875,6.220155 1243,250,875,6.388015 1244,312.5,875,6.664137 1245,375,875,7.031175 1246,437.5,875,7.454558 1247,500,875,7.886237 1248,562.5,875,8.269347 1249,625,875,8.544069 1250,687.5,875,8.65522 1251,750,875,8.561523 1252,812.5,875,8.245191 1253,875,875,7.719232 1254,937.5,875,7.02956 1255,1000,875,6.25 1256,0,937.5,6.25 1257,62.5,937.5,6.204798 1258,125,937.5,6.182552 1259,187.5,937.5,6.202291 1260,250,937.5,6.276018 1261,312.5,937.5,6.406886 1262,375,937.5,6.588625 1263,437.5,937.5,6.805889 1264,500,937.5,7.035236 1265,562.5,937.5,7.246849 1266,625,937.5,7.407397 1267,687.5,937.5,7.484452 1268,750,937.5,7.452312 1269,812.5,937.5,7.298233 1270,875,937.5,7.027311 1271,937.5,937.5,6.664134 1272,1000,937.5,6.25 1273,0,1000,6.25 1274,62.5,1000,6.25 1275,125,1000,6.25 1276,187.5,1000,6.25 1277,250,1000,6.25 1278,312.5,1000,6.25 1279,375,1000,6.25 1280,437.5,1000,6.25 1281,500,1000,6.25 1282,562.5,1000,6.25 1283,625,1000,6.249999 1284,687.5,1000,6.249999 1285,750,1000,6.249999 1286,812.5,1000,6.25 1287,875,1000,6.25 1288,937.5,1000,6.25 1289,1000,1000,6.25 ** *ELEMENT, TYPE=SC8R, ELSET=ELALL 1,1,2,19,18,1001,1002,1019,1018 *ELGEN, ELSET=ELALL 1,16,1,1,16,17,16 ** *SHELL SECTION, ELSET=ELALL, MATERIAL=MAT 12.5,5 *MATERIAL, NAME=MAT *ELASTIC, TYPE=ISO 6.4E+6, 0.3 ** *NSET,NSET=TOP 275,277,279,281,283,285,287 1275,1277,1279,1281,1283,1285,1287 274,276,278,280,282,284,286,288 1274,1276,1278,1280,1282,1284,1286,1288 *NSET,NSET=BOT 3,5,7,9,11,13,15 1003,1005,1007,1009,1011,1013,1015 2,4,6,8,10,12,14,16 1002,1004,1006,1008,1010,1012,1014,1016 *NSET,NSET=RIGHT 34,68,102,136,170,204,238,272 1034,1068,1102,1136,1170,1204,1238,1272 51,85,119,153,187,221,255 1051,1085,1119,1153,1187,1221,1255 *NSET,NSET=LEFT 35,69,103,137,171,205,239 1035,1069,1103,1137,1171,1205,1239 18,52,86,120,154,188,222,256 1018,1052,1086,1120,1154,1188,1222,1256 *NSET,NSET=CORNERS 1,17,273,289 1001,1017,1273,1289 *NSET,NSET=EDGE CORNERS,TOP,BOT,RIGHT,LEFT ** *NSET,NSET=NODECENTER 145,1145 *NSET,NSET=EDGE,GENERATE 1,17,1 1,273,17 17,289,17 273,289,1 *ELSET, ELSET=ESIDE1, GENERATE 1,16,1 *ELSET, ELSET=ESIDE2, GENERATE 16,256,16 *ELSET, ELSET=ESIDE3, GENERATE 241,256,1 *ELSET, ELSET=ESIDE4, GENERATE 1,241,16 *SURFACE, NAME=EDGE1 ESIDE1, S3 *SURFACE, NAME=EDGE2 ESIDE2, S4 *SURFACE, NAME=EDGE3 ESIDE3, S5 *SURFACE, NAME=EDGE4 ESIDE4, S6 *STEP, INC=1000, NLGEOM *STATIC,RIKS 0.01, 1., 1.E-5, 0.01, 1 *BOUNDARY, OP=NEW EDGE, 3,3, 0. NODECENTER, 1,2, 0. 289, 1,1 1289, 1,1 *DSLOAD, FOLLOWER=NO, CONSTANT RESULTANT=YES EDGE1,TRVEC,16960.,-1., 0., 0. EDGE2,TRVEC,16960., 0., 1., 0. EDGE3,TRVEC,16960., 1., 0., 0. EDGE4,TRVEC,16960., 0.,-1., 0. *OUTPUT,FIELD,FREQ=999 *NODE OUTPUT U, *OUTPUT,HISTORY,FREQ=1 *NODE OUTPUT,NSET=NODECENTER U, *NODE PRINT,FREQ=999,NSET=NODECENTER U3, *NODE FILE, FREQ=1,NSET=NODECENTER U, *EL PRINT,FREQ=0 *END STEP