*HEADING Nonlinear viscoelasticity: element: CPE4RH number of networks: 3 hyperelastic material: van der waals *PREPRINT,ECHO=YES,HISTORY=YES **--------------------------------------------- Part1 *PART,NAME=PART-1 *NODE 1, 0.0, 0.0 2, 1.0 3, 1.0, 1.0 4, 0.0, 1.0 *ELEMENT,TYPE=cpe4rh 1, 1,2,3,4 *ELSET,ELSET=EA 1, *SOLID SECTION,ELSET=EA,MATERIAL=VWAALSVISC 1., *NSET,NSET=fix1 1,4 *NSET,NSET=fix2 1,2 *nset, nset=move 2,3 *END PART **--------------------------------------------- Assembly-1 *ASSEMBLY,NAME=ASSEMBLY-1 *INSTANCE,NAME=PART-1-1,PART=PART -1 *END INSTANCE *END ASSEMBLY **--------------------------------------------- End Assembly *MATERIAL,NAME=VWAALSVISC *HYPERELASTIC,VAN DER WAALS,MODULI=INSTANTANEOUS 20., 10., 0.1, 0.02 *VISCOELASTIC,NONLINEAR,NETWORKID=1,SRATIO=0.5,LAW=STRAIN 1.0E-5,1.,-0.5 *VISCOELASTIC,NONLINEAR,NETWORKID=2,SRATIO=0.3,LAW=HYPERB 2.5E-5,0.15,2.0 *BOUNDARY ASSEMBLY-1.PART-1-1.fix1, 1,1 ASSEMBLY-1.PART-1-1.fix2, 2,2 *STEP, NLGEOM=YES APLLY LOAD *STATIC 1.,1. *DLOAD ASSEMBLY-1.PART-1-1.EA,P2,-2.0 *OUTPUT,FIELD,FREQ=10 *ELEMENT OUTPUT S, E, *NODE OUTPUT U, *OUTPUT,HISTORY,FREQ=10 *ENERGY OUTPUT ETOTAL,ALLWK,ALLSE,ALLCD *END STEP *STEP,INC=5000,NLGEOM=YES KEEP LOAD CONSTANT *VISCO,CETOL=1.0E-2 1.0,1000.0,1.0e-8,1.0 *OUTPUT,FIELD,FREQ=500 *ELEMENT OUTPUT S, E, CE, CEEQ, *NODE OUTPUT U, *OUTPUT,HISTORY,FREQ=10 *ELEMENT OUTPUT,ELSET=PART-1-1.EA CEEQ,MISES *ENERGY OUTPUT ETOTAL,ALLWK,ALLSE,ALLCD *END STEP