{"id":312520,"date":"2023-10-20T12:57:40","date_gmt":"2023-10-20T12:57:40","guid":{"rendered":"\/forum\/forums\/reply\/312520\/"},"modified":"2023-10-20T12:57:40","modified_gmt":"2023-10-20T12:57:40","slug":"312520","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/312520\/","title":{"rendered":"Reply To: ansys piezoelectric simulation help"},"content":{"rendered":"

<p>thank you so much, that seems to be making much more sense now… I have changed the code as follows, however when i print the PRNSOL commands it says that the S, D, .. data are not available and hence its ignored. What is the problem? Thank you !<\/p><p> <\/p><div>! Geometry<\/div><div>l = 5e-3 ! beam length, m<\/div><div>w = 5e-3 ! electrode width, m<\/div><div>t = 100e-6 ! thickness, m<\/div><div> <\/div><div>! Material properties<\/div><div>Y = 140e9 ! Young modulus, Pa<\/div><div>mu=0.358 ! Poisson ratio (nearly incompressible rubber)<\/div><div>eps=8.17 ! electrical permittivity, relative<\/div><div>eps0=8.854e-12 ! free-space permittivity, F\/m<\/div><div> <\/div><div>\/VUP,1,z<\/div><div>\/VIEW,1,1,1,1<\/div><div> <\/div><div> <\/div><div>\/PREP7<\/div><div>ET, 1, 5, 3<\/div><div> <\/div><div>! == Material parameters<\/div><div>! — Elastic coefficients, MPa<\/div><div>c11 = 209.71e9<\/div><div>c12 = 121.14e9<\/div><div>c13 = 105.36e9<\/div><div>c33 = 210.9e9<\/div><div>c44 = 42.5e9<\/div><div>c66 = 44.28e9<\/div><div> <\/div><div>tb,ANEL,1<\/div><div>tbdata, 1, c11, c12, c13<\/div><div>tbdata, 7, c11, c13<\/div><div>tbdata, 12, c33<\/div><div>tbdata, 16, c66<\/div><div>tbdata, 19, c44<\/div><div>tbdata, 21, c44<\/div><div> <\/div><div>! — Piezoelectric coefficients, pC\/um2<\/div><div>e13 = -0.61<\/div><div>e33 = 1.14<\/div><div>e15 = -0.59<\/div><div> <\/div><div>tb,PIEZ,1<\/div><div>tbdata, 3, e13<\/div><div>tbdata, 6, e13<\/div><div>tbdata, 9, e33<\/div><div>tbdata,14, e15<\/div><div>tbdata,16, e15<\/div><div> <\/div><div>! — Dielectric constants<\/div><div>emunit,EPZRO,8.854e-6 ! pF\/um<\/div><div>mp,PERx,1, 7.57<\/div><div>mp,PERy,1, 7.57<\/div><div>mp,PERz,1, 8.31<\/div><div> <\/div><div>! — model and mesh block<\/div><div>block,-l\/2,l\/2,-w\/2,w\/2,0,t<\/div><div> <\/div><div>! Set the merging tolerance (adjust as needed)<\/div><div>KETOL = 1.0e-5<\/div><div>vmesh,1<\/div><div> <\/div><div>! Structural BC<\/div><div>nsel,s,loc,z,0<\/div><div>d, all, volt, 0<\/div><div>d,all,ux,0<\/div><div>d,all,uy,0<\/div><div>d,all,uz,0<\/div><div>nsel,all<\/div><div> <\/div><div>nsel,s,loc,z,t<\/div><div>SF,ALL,PRES,10000 ! APPLY PRESSURE LOAD<\/div><div>NSEL,ALL<\/div><div>FINISH<\/div><div> <\/div><div>\/SOLVE<\/div><div>OUTPR,,LAST<\/div><div>\/OUT,SCRATCH<\/div><div>SOLVE<\/div><div>FINISH<\/div><div>\/POST1<\/div><div>\/OUT,<\/div><div>PRNSOL,S,COMP<\/div><div>PRNSOL,EPEL,COMP<\/div><div>PRNSOL,EF,COMP<\/div><div>PRNSOL,D,COMP<\/div><\/p>\n","protected":false},"template":"","class_list":["post-312520","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t