# If a pressure is applied to a free surface that comes into contact, does the pressure remain active in ANSYS LS-DYNA?

 Yes. Please see the ANSYS LS-DYNA 10.0 example below (and attached as well) that demonstrates this behavior.! = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =fini/clear/title, Check Effect of Pressure on Surfaces in Contact/plopts,info,1/view,,1,2,3/pnum,type,1/num,1/prep7et,1,SOLID164r,1mp,ex,1,30.0e6 ! psimp,prxy,1,0.30 ! unitlessmp,dens,1,0.007 ! lbf-sec^2/in^4 (10 X true density)edmp,rigid,1,7,7 ! fixed rigid base ...et,2,SOLID164r,2mp,ex,2,30.0e6 ! psimp,prxy,2,0.30 ! unitlessmp,dens,2,0.007 ! lbf-sec^2/in^4 (10 X true density)edmp,hgls,2,5et,3,SOLID164r,3mp,ex,3,30.0e6 ! psimp,prxy,3,0.30 ! unitlessmp,dens,3,0.007 ! lbf-sec^2/in^4 (10 X true density)edmp,hgls,3,5block,0,100,0,10,0,60block,20,40,10,30,20,40block,60,80,10,30,20,40esize,,1*do,ii,1,3,1 /gopr *if,ii,ne,1,then esize,5.0 *endif vsel,s,volu,,ii mat,ii type,ii real,ii vmesh,ii allsel,below,volu cm,nblock%ii%,node cm,eblock%ii%,elem*enddoallsel,alledpart,createeddamp,all,,0.01eddamp,2,,1.0e-4eddamp,3,,1.0e-4edcgen,ageplotfini/solunsel,s,loc,x,20nsel,a,loc,x,60d,all,ux,0.0nsel,s,loc,z,20d,all,uz,0.0cmsel,s,nblock3nsel,r,loc,y,10cm,ncont,nodeeslncm,econt,elemnsel,s,loc,y,30cm,nmove,nodensel,allesel,all*dim,etime,,2etime(1)=0.0,0.101*dim,ydisp,,2ydisp(1)=0.0,-0.5*dim,epres,,2epres(1)=0.0,1.0e5edload,add,uy,,nmove,etime(1),ydisp(1)/psf,pres,norm,2edload,add,press,2,econt,etime(1),epres(1)time,0.10edrst,50edhtime,100edhist,nblock2edhist,nblock3edenergy,1,1,1,1edout,glstatsolvesavefini/post26numvar,200file,,hiscmsel,u,nblock1cmsel,u,eblock1ntrack2=node(30,10,30)ntrack3=node(70,10,30)nsol,2,ntrack2,u,y,n2_uynsol,3,ntrack3,u,y,n3_uystore,mergeplvar,2,3/wait,2fini/post1set,last/edge,,1/dscale,,1plnsol,s,y,2.