# Reduced Input

*Node and *Element Cards are removed.

*KEYWORD *TITLE Foam Material Model for a Single Element $ $ LSTC Example $ $ Last Modified: September 18, 1997 $ $ This problem contains a single element with one degree of $ freedom on a single side. The element compresses and expands $ following a prescribed velocity motion. $ $ The material is a foam which follows a pressure volumetric $ strain relationship. The foam block is compressed and $ expanded in a range of relative volume (V/Vo) from 1.0 $ to 0.0091 to 1.441. $ $ Two types of unloading are explored: $ 1. Unloading follows the loading curve $ 2. Bulk unloading modulus is used - volumetric crushing $ $ The foam has a tensile fracture pressure cutoff of 0.5 $ $ Units: lbf-s2/in, in, s, lbf, psi, lbf-in $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $$$$ Control Ouput $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8 $ *CONTROL_TERMINATION $ endtim endcyc dtmin endneg endmas 0.250 $ *CONTROL_ENERGY $ hgen rwen slnten rylen 2 2 $ $ *DATABASE_BINARY_D3PLOT $ dt/cycl lcdt 0.005 $ *DATABASE_BINARY_D3THDT $ dt/cycl lcdt 0.001 $ *DATABASE_GLSTAT $ dt/cycl lcdt 0.005 $ *DATABASE_ELOUT $ dt/cycl lcdt 0.005 $ *DATABASE_HISTORY_SOLID 1 $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $$$$ Boundary Motion Conditions $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8 $ *BOUNDARY_PRESCRIBED_MOTION_SET $ nid dof vad lcid sf vid 1 3 0 1 1.0 0 $ *DEFINE_CURVE $ lcid sidr scla sclo offa offo 1 $ abscissa ordinate 0.000E+00 -9.000E+02 1.000E-01 -9.000E+02 1.010E-01 9.000E+02 2.500E-01 9.000E+02 $ *SET_NODE_LIST $ sid 1 $ nid1 nid2 nid3 nid4 nid5 nid6 nid7 nid8 5 6 7 8 $ $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $$$$ Define Parts and Materials $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8 $ *PART $ pid sid mid eosid hgid adpopt foam block 1 1 1 $ $ *MAT_SOIL_AND_FOAM $ mid ro g bulk a0 a1 a2 pc 1 6.740E-11 5.760E+01 1.794E+01 1.200E-01 0.000E+00 0.000E+00-5.000E-01 $ f f $ vcr dun $ $ Unloading follows the loading curve $ 1.000E+00 0.000E+00 $ $ Bulk unloading modulus is used - volumetric crushing 0.000E+00 0.000E+00 $ $ eps1 eps2 eps3 eps4 eps5 eps6 eps7 eps8 -2.500E-02-5.000E-02-1.050E-01-3.570E-01-6.930E-01-9.160E-01-1.200E+00-1.610E+00 $ $ eps9 eps10 0.000E+00 0.000E+00 $ $ p1 p2 p3 p4 p5 p6 p7 p8 3.450E-01 5.170E-01 6.890E-01 8.070E-01 1.110E+00 1.240E+00 1.300E+00 1.500E+00 $ $ p9 p10 0.000E+00 0.000E+00 $ $ *SECTION_SOLID $ sid elform 1 $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $$$$ Define Nodes and Elements $ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $ $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8 $ $ *END