*HEADING
 SQUARE PLATE - ELASTIC BUCKLING  ( THERMAL EXP. BUCKLE )
*PREPRINT,ECHO=YES,HISTORY=NO,MODEL=NO
*NODE
*NGEN,NSET=YSYM
*NGEN,NSET=XSYM
*NGEN,NSET=YEDG
*NGEN,NSET=XEDG
*NFILL,NSET=TEMP
XSYM,XEDG,4,1
*ELEMENT,TYPE=S8R,ELSET=ONE
*ELGEN,ELSET=ONE
*SHELL SECTION,MATERIAL=A1,ELSET=ONE
.01,3
*MATERIAL,NAME=A1
*ELASTIC
1.E8,.3
*EXPANSION
1.E-6,
*BOUNDARY
YSYM,YSYMM
XSYM,XSYMM
YEDG,3
YEDG,5
XEDG,3
XEDG,4
XEDG,1
XEDG,6
*STEP
*BUCKLE
3,
*TEMPERATURE
TEMP,100.
*EL PRINT,ELSET=ONE
S,
*MODAL FILE
*END STEP