$ a = 6667 with or without mass-scaling $ (proves mass of seatbelt is unaffected by DT2MS) $ $ use double precision $ $ Internal energy for seatbelt not computed prior to v. 970 $ Even in 970, glstat energy ratio is not good $ The timestep for a seatbelt element is calculated in similar fashion $ to that of a discrete (spring) element but with a $ reduction factor of 0.6 applied. I assume the 0.6 is to promote stability. $ $ dt = timestep scale factor * sqrt(m/k) * 0.6 $ $ k = F/deltaL = F/(eps * L) = (initial slope of F vs. eps curve) / L $ = 1e5/50 $ L = current element length $ $ m = sum of nodal masses $ $ nodal mass = tributary belt length * mass per unit length $ = 50 * 3.e-7 $ *KEYWORD *TITLE au03 : Slip ring and retractor $$ HM_OUTPUT_DECK created 16:21:17 01-27-2004 by HyperMesh Version 5.1 $$ Generated using HyperMesh-Ls-dyna Template Version : 5.1-4 *CONTROL_TERMINATION $$ ENDTIM ENDCYC DTMIN ENDENG ENDMAS 0.1 0 0.0 0.0 0.0 $*MAT_SEATBELT *mat_b01 13.0000E-07 33 33 2.0 $ 13.0000E-06 33 33 2.0 *CONTROL_TIMESTEP $$ DTINIT TSSFAC ISDO TSLIMT DT2MS LCTM ERODE MSIST $ 0.8 ,.8,,, -6.e-5 *CONTROL_SHELL $$ WRPANG ESORT IRNXX ISTUPD THEORY BWC MITER PROJ 0.0 0 0 0 0 0 *CONTROL_CONTACT $$ SLSFAC RWPNAL ISLCHK SHLTHK PENOPT THKCHG ORIEN ENMASS 0.0 0.0 0 0 2 0 0 $$ USRSTR USRFRC NSBCS INTERM XPENE SSTHK ECDT TIEDPRJ 0 0 0 0 0.0 *CONTROL_ENERGY $$ HGEN RWEN SLNTEN RYLEN 2 2 2 2 *CONTROL_STRUCTURED $$Card will be output. No editable fields $$ $$DATABASE_OPTION -- Control Cards for ASCII output *DATABASE_GLSTAT 2.0000E-04 *DATABASE_MATSUM 2.0000E-04 *DATABASE_SBTOUT 2.0000E-03 *DATABASE_BINARY_D3PLOT $$ DT/CYCL LCDT BEAM NPLTC 4.0000E-04 *DATABASE_BINARY_D3THDT $$ DT/CYCL LCID 2.0000E-04 0 *DATABASE_BINARY_D3DUMP $$ DT/CYCL 99999.0 *DATABASE_BINARY_RUNRSF $$ DT/CYCL 99999.0 *DATABASE_BINARY_INTFOR $$ DT/CYCL LCID 2.0000E-04 0 *DATABASE_EXTENT_BINARY $$ NEIPH NEIPS MAXINT STRFLG SIGFLG EPSFLG RLTFLG ENGFLG 0 0 0 0 0 0 0 0 $$ CMPFLG IEVERP BEAMIP DCOMP SHGE STSSZ N3THDT 0 0 *NODE 9 0.0 0.0 400.0 10 50.0 0.0 400.0 16 350.0 0.0 400.0 17 400.0 0.0 400.0 118 0.0 0.0 900.0 219 0.75 0.0 525.0 220 0.5 0.0 650.0 221 0.25 0.0 775.0 223 345.0 0.0 400.0 224 340.0 0.0 400.0 225 335.0 0.0 400.0 226 330.0 0.0 400.0 227 325.0 0.0 400.0 228 320.0 0.0 400.0 229 315.0 0.0 400.0 230 310.0 0.0 400.0 231 305.0 0.0 400.0 232 300.0 0.0 400.0 233 295.0 0.0 400.0 234 290.0 0.0 400.0 235 285.0 0.0 400.0 236 280.0 0.0 400.0 237 275.0 0.0 400.0 238 270.0 0.0 400.0 239 265.0 0.0 400.0 240 260.0 0.0 400.0 241 255.0 0.0 400.0 242 250.0 0.0 400.0 243 245.0 0.0 400.0 244 240.0 0.0 400.0 245 235.0 0.0 400.0 246 230.0 0.0 400.0 247 225.0 0.0 400.0 248 220.0 0.0 400.0 249 215.0 0.0 400.0 250 210.0 0.0 400.0 251 205.0 0.0 400.0 252 200.0 0.0 400.0 253 195.0 0.0 400.0 254 190.0 0.0 400.0 255 185.0 0.0 400.0 256 180.0 0.0 400.0 257 175.0 0.0 400.0 258 170.0 0.0 400.0 259 165.0 0.0 400.0 260 160.0 0.0 400.0 261 155.0 0.0 400.0 262 150.0 0.0 400.0 263 145.0 0.0 400.0 264 140.0 0.0 400.0 265 135.0 0.0 400.0 266 130.0 0.0 400.0 267 125.0 0.0 400.0 268 120.0 0.0 400.0 269 115.0 0.0 400.0 270 110.0 0.0 400.0 271 105.0 0.0 400.0 272 100.0 0.0 400.0 273 95.0 0.0 400.0 274 90.0 0.0 400.0 275 85.0 0.0 400.0 276 80.0 0.0 400.0 277 75.0 0.0 400.0 27869.9999999999999 0.0 400.0 27964.9999999999999 0.0 400.0 280 60.0 0.0 400.0 281 55.0 0.0 400.0 283 45.0 0.0 400.0 284 40.0 0.0 400.0 285 35.0 0.0 400.0 286 30.0 0.0 400.0 287 25.0 0.0 400.0 28820.0000000000001 0.0 400.0 289 15.0 0.0 400.0 290 10.0 0.0 400.0 291 5.0 0.0 400.0 294 350.0 0.0 400.0 *MAT_ELASTIC $HMNAME MATS 20MATL1_20 201.0000E-09 2000000.0 0.3 *PART $HMNAME COMPS 1Part for belt material 1 $HMCOLOR COMPS 1 1 Part for belt material 1 1 1 1 0 0 $HMNAME COMPS 20Part_20 $HMCOLOR COMPS 20 4 20 20 20 *SECTION_SEATBELT $HMNAME PROPS 1SectSeatBelt_1 1 *SECTION_BEAM $HMNAME PROPS 20SectBeam_20 20 2 2.0 5.0 100.0 100.0 200.0 5.0 *BOUNDARY_SPC_SET $HMNAME LOADCOLS 2BoundSpcSet_2 $HMCOLOR LOADCOLS 2 1 1 0 0 1 1 0 0 0 *BOUNDARY_SPC_SET $HMNAME LOADCOLS 3BoundSpcSet_3 $HMCOLOR LOADCOLS 3 1 2 0 1 1 1 0 0 0 *ELEMENT_SEATBELT 116 1 16 17 0 0.0 *NODE 295 13.250024999975 0.0 525.0 296 12.500224997975 0.0 400.0 297 12.750024999975 0.0 775.0 298 13.000024999975 0.0 650.0 $$ Sets Defined In HyperMesh $$ *SET_NODE_LIST $HMSET $HMNAME SETS 1Set_1 1 17 *SET_NODE_LIST $HMSET $HMNAME SETS 2Set_2 2 *SET_NODE_LIST $HMSET $HMNAME SETS 20Set_20 20 118 *LOAD_NODE_POINT $HMNAME 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