A.5 Blast loading on a stiffened plate

blast_base.inp

*HEADING
Blast load on a flat plate with stiffeners   
S4R elements (20x20 mesh)     
Normal stiffeners (20x2)     
SI units (kg, m, s, N)      
**
** Define corners and edges of plate 
**
*NODE, NSET=CORNERS     
1,0.0, 0.0,0.0  
21,0.0, 2.0, 0.0
801, 0.0, 0.0, 2.0      
821, 0.0, 2.0, 2.0      
*NGEN,NSET=EDGE1
1,21,1  
*NGEN,NSET=EDGE2
801,821,1       
*NFILL,NSET=NALL
EDGE1,EDGE2,20,40       
*NGEN,NSET=EDGE3
1,801,40
*NGEN,NSET=EDGE4
21,821,40       
*NSET,NSET=EDGE
EDGE1,EDGE2,EDGE3,EDGE4
**
** Define a node set for output
**
*NSET, NSET=NOUT
411  ,    
**
** Define stiffeners
**
*NODE, NSET=STIFFN      
4201,0.1, 0.0, 0.5       
4221,0.1, 2.0, 0.5      
4401,0.1, 0.0, 1.0      
4421,0.1, 2.0, 1.0      
4601,0.1, 0.0, 1.5      
4621,0.1, 2.0, 1.5      
**Generate inner edges of stiffeners    
*NGEN,NSET=ST1EDGE1     
4201,4221,1     
*NGEN,NSET=ST2EDGE1     
4401,4421,1     
*NGEN,NSET=ST3EDGE1     
4601,4621,1     
** Define node sets on plate for outer edge of stiffeners       
*NSET, NSET=ST1EDGE2, GENERATE  
201,221,1       
*NSET, NSET=ST2EDGE2, GENERATE  
401,421,1       
*NSET, NSET=ST3EDGE2, GENERATE  
601,621,1       
*NFILL  
ST1EDGE2,ST1EDGE1,2,2000
*NFILL  
ST2EDGE2,ST2EDGE1,2,2000
*NFILL  
ST3EDGE2,ST3EDGE1,2,2000
**      
** Define master element type for plate (with associated nodes) 
** and generate shell elements  
*ELEMENT,TYPE=S4R,ELSET=PLATE       
1,1,2,42,41     
*ELGEN,ELSET=PLATE      
1,20,1,1,20,40,20       
** Define master element type for stiffeners and generate       
*ELEMENT,TYPE=S4R,ELSET=STIFF1
1001, 201,2201,2202,202 
*ELGEN,ELSET=STIFF1     
1001,20,1,1,2,2000,20   
*ELEMENT,TYPE=S4R,ELSET=STIFF2
2001, 401,2401,2402,402 
*ELGEN,ELSET=STIFF2     
2001,20,1,1,2,2000,20   
*ELEMENT,TYPE=S4R,ELSET=STIFF3
3001, 601,2601,2602,602 
*ELGEN,ELSET=STIFF3     
3001,20,1,1,2,2000,20   
** Define elset for el history output   
** Elements on central stiffener
*ELSET, ELSET=STIFFMAX  
2009, 2010, 2029, 2030   
**      
*SHELL SECTION,MATERIAL=STEEL,ELSET=PLATE,OFFSET=SPOS      
0.025   , 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF1     
0.0125  , 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF2     
0.0125, 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF3     
0.0125, 
**
*MATERIAL,NAME=STEEL
*ELASTIC
210.0E9,.3      
*PLASTIC
300.0E6, 0.000
350.0E6, 0.025
375.0E6, 0.100
394.0E6, 0.200
400.0E6, 0.350
*DENSITY
7800.0,  
**
*BOUNDARY       
EDGE, ENCASTRE 
** Specify time variation for blast load
*AMPLITUDE, NAME=BLAST  
0.0, 0.0, 1.0E-03, 7.0E5, 10E-03, 7.0E05, 20E-03, 0.0, 50E-03, 0.0    
*STEP   
 Apply blast loading    
** Explicit analysis with a time duration of 50 ms
*DYNAMIC, EXPLICIT      
 , 50E-03       
** Apply distributed load (surface pressure) to the element set PLATE   
*DLOAD, AMPLITUDE=BLAST 
PLATE, P, 1.0  
*MONITOR, NODE=411, DOF=1       
*OUTPUT, FIELD, NUMBER INTERVAL=25
*ELEMENT OUTPUT
S,PE
*NODE OUTPUT
U
*OUTPUT, HISTORY, TIME INTERVAL=1.0E-4 
*ELEMENT OUTPUT, ELSET=STIFFMAX     
PEEQ, MISES, ERV,
*NODE OUTPUT, NSET=NOUT
U,V     
*ENERGY OUTPUT
ALLKE, ALLSE, ALLWK, ALLPD, ALLIE, ALLVD, ALLAE, ETOTAL 
**
*NSET,NSET=QA_TEST
370,371,372,
410,411,412,
450,451,452,
*OUTPUT, FIELD, NUMBER INTERVAL=5, TIMEMARKS=YES
*NODE OUTPUT,NSET=QA_TEST
U,
*OUTPUT, HISTORY, VARIABLE=PRESELECT, TIME INTERVAL=10E-03
*END STEP

blast_damp.inp

*HEADING
Blast load on a flat plate with stiffeners   
S4R elements (20x20 mesh)     
Normal stiffeners (20x2)     
SI units (kg, m, s, N)   
Includes damping
Longer analysis time (150ms)
**
** Define corners and edges of plate       
**
*NODE, NSET=CORNERS     
1,0.0, 0.0,0.0  
21,0.0, 2.0, 0.0
801, 0.0, 0.0, 2.0      
821, 0.0, 2.0, 2.0      
*NGEN,NSET=EDGE1
1,21,1  
*NGEN,NSET=EDGE2
801,821,1       
*NFILL,NSET=NALL
EDGE1,EDGE2,20,40       
*NGEN,NSET=EDGE3
1,801,40
*NGEN,NSET=EDGE4
21,821,40  
*NSET,NSET=EDGE
EDGE1,EDGE2,EDGE3,EDGE4
**  
** Define a node set for output
**
*NSET, NSET=NOUT
411  ,    
**
** Define stiffeners
**
*NODE, NSET=STIFFN      
4201,0.1, 0.0, 0.5       
4221,0.1, 2.0, 0.5      
4401,0.1, 0.0, 1.0      
4421,0.1, 2.0, 1.0      
4601,0.1, 0.0, 1.5      
4621,0.1, 2.0, 1.5      
**Generate inner edges of stiffeners    
*NGEN,NSET=ST1EDGE1     
4201,4221,1     
*NGEN,NSET=ST2EDGE1     
4401,4421,1     
*NGEN,NSET=ST3EDGE1     
4601,4621,1     
** Define node sets on plate for outer edge of stiffeners       
*NSET, NSET=ST1EDGE2, GENERATE  
201,221,1       
*NSET, NSET=ST2EDGE2, GENERATE  
401,421,1       
*NSET, NSET=ST3EDGE2, GENERATE  
601,621,1       
*NFILL  
ST1EDGE2,ST1EDGE1,2,2000
*NFILL  
ST2EDGE2,ST2EDGE1,2,2000
*NFILL  
ST3EDGE2,ST3EDGE1,2,2000
**      
** Define master element type for plate (with associated nodes) 
** and generate shell elements  
*ELEMENT,TYPE=S4R,ELSET=PLATE
1,1,2,42,41     
*ELGEN,ELSET=PLATE      
1,20,1,1,20,40,20       
** Define master element type for stiffeners and generate       
*ELEMENT,TYPE=S4R,ELSET=STIFF1
1001, 201,2201,2202,202 
*ELGEN,ELSET=STIFF1     
1001,20,1,1,2,2000,20   
*ELEMENT,TYPE=S4R,ELSET=STIFF2     
2001, 401,2401,2402,402 
*ELGEN,ELSET=STIFF2     
2001,20,1,1,2,2000,20   
*ELEMENT,TYPE=S4R,ELSET=STIFF3       
3001, 601,2601,2602,602 
*ELGEN,ELSET=STIFF3     
3001,20,1,1,2,2000,20   
** Define elset for el history output   
** Elements on central stiffener
*ELSET, ELSET=STIFFMAX  
2009, 2010, 2029, 2030   
**      
*SHELL SECTION,MATERIAL=STEEL,ELSET=PLATE,OFFSET=SPOS      
0.025   , 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF1     
0.0125  , 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF2     
0.0125  , 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF3     
0.0125  , 
**
*MATERIAL,NAME=STEEL
*ELASTIC
210.0E9,.3      
*PLASTIC
300.0E6, 0.000
350.0E6, 0.025
375.0E6, 0.100
394.0E6, 0.200
400.0E6, 0.350
*DENSITY
7800.0, 
*DAMPING, ALPHA=50.0, BETA=0.0
**
*BOUNDARY       
EDGE, ENCASTRE 
** Specify time variation for blast load
*AMPLITUDE, NAME=BLAST  
0.0, 0.0, 1.0E-03, 7.0E5, 10E-03, 7.0E05, 20E-03, 0.0, 50E-03, 0.0    
*STEP   
 Apply blast loading    
** Explicit analysis with a time duration of 150 ms
*DYNAMIC, EXPLICIT      
 ,150E-03       
** Apply distributed load (surface pressure) to the element set PLATE   
*DLOAD, AMPLITUDE=BLAST 
PLATE, P, 1.0  
*MONITOR, NODE=411, DOF=1       
*OUTPUT, FIELD, NUMBER INTERVAL=25
*ELEMENT OUTPUT
S,PE
*NODE OUTPUT
U
*OUTPUT, HISTORY, TIME INTERVAL=1.0E-4 
*ELEMENT OUTPUT, ELSET=STIFFMAX     
PEEQ, MISES, ERV,
*NODE OUTPUT, NSET=NOUT
U,V   
*ENERGY OUTPUT
ALLKE, ALLSE, ALLWK, ALLPD, ALLIE, ALLVD, ALLAE, ETOTAL 
**
*NSET,NSET=QA_TEST
370,371,372,
410,411,412,
450,451,452,
*OUTPUT, FIELD, NUMBER INTERVAL=5, TIMEMARKS=YES
*NODE OUTPUT,NSET=QA_TEST
U
*OUTPUT, HISTORY, VARIABLE=PRESELECT, TIME INTERVAL=30E-03
*END STEP

blast_long.inp

*HEADING
Blast load on a flat plate with stiffeners   
S4R elements (20x20 mesh)     
Normal stiffeners (20x2)     
SI units (kg, m, s, N)     
Longer analysis time to compare to blast_damp
**
** Define corners and edges of plate
**
*NODE, NSET=CORNERS     
1,0.0, 0.0,0.0  
21,0.0, 2.0, 0.0
801, 0.0, 0.0, 2.0      
821, 0.0, 2.0, 2.0      
*NGEN,NSET=EDGE1
1,21,1  
*NGEN,NSET=EDGE2
801,821,1       
*NFILL,NSET=NALL
EDGE1,EDGE2,20,40       
*NGEN,NSET=EDGE3
1,801,40
*NGEN,NSET=EDGE4
21,821,40
*NSET,NSET=EDGE
EDGE1,EDGE2,EDGE3,EDGE4       
**
** Define a node set for output
**
*NSET, NSET=NOUT
411  ,    
**
** Define stiffeners
**
*NODE, NSET=STIFFN      
4201,0.1, 0.0, 0.5       
4221,0.1, 2.0, 0.5      
4401,0.1, 0.0, 1.0      
4421,0.1, 2.0, 1.0      
4601,0.1, 0.0, 1.5      
4621,0.1, 2.0, 1.5      
**Generate inner edges of stiffeners    
*NGEN,NSET=ST1EDGE1     
4201,4221,1     
*NGEN,NSET=ST2EDGE1     
4401,4421,1     
*NGEN,NSET=ST3EDGE1     
4601,4621,1     
** Define node sets on plate for outer edge of stiffeners       
*NSET, NSET=ST1EDGE2, GENERATE  
201,221,1       
*NSET, NSET=ST2EDGE2, GENERATE  
401,421,1       
*NSET, NSET=ST3EDGE2, GENERATE  
601,621,1       
*NFILL  
ST1EDGE2,ST1EDGE1,2,2000
*NFILL  
ST2EDGE2,ST2EDGE1,2,2000
*NFILL  
ST3EDGE2,ST3EDGE1,2,2000
**      
** Define master element type for plate (with associated nodes) 
** and generate shell elements  
*ELEMENT,TYPE=S4R,ELSET=PLATE       
1,1,2,42,41     
*ELGEN,ELSET=PLATE      
1,20,1,1,20,40,20       
** Define master element type for stiffeners and generate       
*ELEMENT,TYPE=S4R,ELSET=STIFF1      
1001, 201,2201,2202,202 
*ELGEN,ELSET=STIFF1     
1001,20,1,1,2,2000,20   
*ELEMENT,TYPE=S4R,ELSET=STIFF2       
2001, 401,2401,2402,402 
*ELGEN,ELSET=STIFF2     
2001,20,1,1,2,2000,20   
*ELEMENT,TYPE=S4R,ELSET=STIFF3       
3001, 601,2601,2602,602 
*ELGEN,ELSET=STIFF3     
3001,20,1,1,2,2000,20   
** Define elset for el history output   
** Elements on central stiffener
*ELSET, ELSET=STIFFMAX  
2009, 2010, 2029, 2030   
**      
*SHELL SECTION,MATERIAL=STEEL,ELSET=PLATE,OFFSET=SPOS
0.025   , 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF1     
0.0125  , 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF2     
0.0125  , 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF3     
0.0125  , 
**
*MATERIAL,NAME=STEEL
*ELASTIC
210.0E9,.3      
*PLASTIC
300.0E6, 0.000
350.0E6, 0.025
375.0E6, 0.100
394.0E6, 0.200
400.0E6, 0.350
*DENSITY
7800.0  , 
**
*BOUNDARY       
EDGE, ENCASTRE 
** Specify time variation for blast load
*AMPLITUDE, NAME=BLAST  
0.0, 0.0, 1.0E-03, 7.0E5, 10E-03, 7.0E05, 20E-03, 0.0, 50E-03, 0.0    
*STEP   
 Apply blast loading    
** Explicit analysis with a time duration of 150 ms
*DYNAMIC, EXPLICIT      
 ,150E-03       
** Apply distributed load (surface pressure) to the element set PLATE   
*DLOAD, AMPLITUDE=BLAST 
PLATE, P, 1.0  
*MONITOR, NODE=411, DOF=1       
*OUTPUT, FIELD, NUMBER INTERVAL=25
*ELEMENT OUTPUT
S,PE
*NODE OUTPUT
U
*OUTPUT, HISTORY, TIME INTERVAL=1.0E-4 
*ELEMENT OUTPUT, ELSET=STIFFMAX     
PEEQ, MISES, ERV, 
*NODE OUTPUT, NSET=NOUT
U,V  
*ENERGY OUTPUT
ALLKE, ALLSE, ALLWK, ALLPD, ALLIE, ALLVD, ALLAE, ETOTAL 
**
*NSET,NSET=QA_TEST
370,371,372,
410,411,412,
450,451,452,
*OUTPUT, FIELD, NUMBER INTERVAL=5, TIMEMARKS=YES
*NODE OUTPUT,NSET=QA_TEST
U
*OUTPUT, HISTORY, VARIABLE=PRESELECT, TIME INTERVAL=30E-03
*END STEP

blast_refined.inp

*HEADING
Blast load on a flat plate with stiffeners   
S4R elements (20x20 mesh)     
Refined stiffeners (20x4)     
SI units (kg, m, s, N)      
**
** Define corners and edges of plate       
**
*NODE, NSET=CORNERS     
1,0.0, 0.0,0.0  
21,0.0, 2.0, 0.0
801, 0.0, 0.0, 2.0      
821, 0.0, 2.0, 2.0      
*NGEN,NSET=EDGE1
1,21,1  
*NGEN,NSET=EDGE2
801,821,1       
*NFILL,	NSET=NALL  
EDGE1,EDGE2,20,40       
*NGEN,NSET=EDGE3
1,801,40
*NGEN,NSET=EDGE4
21,821,40 
*NSET,NSET=EDGE
EDGE1,EDGE2,EDGE3,EDGE4
**     
** Define a node set for output
**
*NSET, NSET=NOUT
411  ,    
**
** define stiffeners
**
*NODE, NSET=STIFFN      
4201,0.1, 0.0, 0.5       
4221,0.1, 2.0, 0.5      
4401,0.1, 0.0, 1.0      
4421,0.1, 2.0, 1.0      
4601,0.1, 0.0, 1.5      
4621,0.1, 2.0, 1.5      
**Generate inner edges of stiffeners    
*NGEN,NSET=ST1EDGE1     
4201,4221,1     
*NGEN,NSET=ST2EDGE1     
4401,4421,1     
*NGEN,NSET=ST3EDGE1     
4601,4621,1     
** Define node sets on plate for outer edge of stiffeners       
*NSET, NSET=ST1EDGE2, GENERATE  
201,221,1       
*NSET, NSET=ST2EDGE2, GENERATE  
401,421,1       
*NSET, NSET=ST3EDGE2, GENERATE  
601,621,1       
*NFILL  
ST1EDGE2,ST1EDGE1,4,1000
*NFILL  
ST2EDGE2,ST2EDGE1,4,1000
*NFILL  
ST3EDGE2,ST3EDGE1,4,1000
**      
** Define master element type for plate (with associated nodes) 
** and generate shell elements  
*ELEMENT,TYPE=S4R,ELSET=PLATE     
1,1,2,42,41     
*ELGEN,ELSET=PLATE      
1,20,1,1,20,40,20       
** Define master element type for stiffeners and generate       
*ELEMENT,TYPE=S4R,ELSET=STIFF1       
1001, 201,1201,1202,202 
*ELGEN,ELSET=STIFF1     
1001,20,1,1,4,1000,20   
*ELEMENT,TYPE=S4R,ELSET=STIFF2       
2001, 401,1401,1402,402 
*ELGEN,ELSET=STIFF2     
2001,20,1,1,4,1000,20   
*ELEMENT,TYPE=S4R,ELSET=STIFF3       
3001, 601,1601,1602,602 
*ELGEN,ELSET=STIFF3     
3001,20,1,1,4,1000,20   
** Define elset for el history output   
** Elements on central stiffener
*ELSET, ELSET=STIFFMAX  
2009, 2010, 2029,2030,2050,2051,2070,2071
**
*SHELL SECTION,MATERIAL=STEEL,ELSET=PLATE,OFFSET=SPOS
0.025   , 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF1     
0.0125  , 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF2     
0.0125  , 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF3     
0.0125  , 
**      
*MATERIAL,NAME=STEEL
*ELASTIC
210.0E9,.3      
*PLASTIC
300.0E6, 0.000
350.0E6, 0.025
375.0E6, 0.100
394.0E6, 0.200
400.0E6, 0.350
*DENSITY
7800.0,  
**
*BOUNDARY       
EDGE, ENCASTRE 
** Specify time variation for blast load
*AMPLITUDE, NAME=BLAST  
0.0, 0.0, 1.0E-03, 7.0E5, 10E-03, 7.0E05, 20E-03, 0.0, 50E-03, 0.0    
*STEP   
 Apply blast loading    
** Explicit analysis with a time duration of 50 ms
*DYNAMIC, EXPLICIT      
 , 50E-03       
** Apply distributed load (surface pressure) to the element set PLATE   
*DLOAD, AMPLITUDE=BLAST 
PLATE, P, 1.0  
*MONITOR, NODE=411, DOF=1       
*OUTPUT, FIELD, NUMBER INTERVAL=25
*ELEMENT OUTPUT
S,PE,PEEQ
*NODE OUTPUT
U
*OUTPUT, HISTORY, TIME INTERVAL=1.0E-4 
*ELEMENT OUTPUT, ELSET=STIFFMAX     
PEEQ, MISES, ERV,
*NODE OUTPUT, NSET=NOUT
U,V 
*ENERGY OUTPUT 
ALLKE, ALLSE, ALLWK, ALLPD, ALLIE, ALLVD, ALLAE, ETOTAL 
**
*NSET,NSET=QA_TEST
370,371,372,
410,411,412,
450,451,452,
*OUTPUT, FIELD, NUMBER INTERVAL=5, TIMEMARKS=YES
*NODE OUTPUT,NSET=QA_TEST
U
*OUTPUT, HISTORY, VARIABLE=PRESELECT, TIME INTERVAL=10E-03
*END STEP

blast_rate.inp

*HEADING
Blast load on a flat plate with stiffeners   
S4R elements (20x20 mesh)     
Normal stiffeners (20x2)     
SI units (kg, m, s, N)      
Includes damping
Includes rate-dependent plasticity
**
** Define corners and edges of plate       
**
*NODE, NSET=CORNERS     
1,0.0, 0.0,0.0  
21,0.0, 2.0, 0.0
801, 0.0, 0.0, 2.0      
821, 0.0, 2.0, 2.0      
*NGEN,NSET=EDGE1
1,21,1  
*NGEN,NSET=EDGE2
801,821,1       
*NFILL,NSET=NALL
EDGE1,EDGE2,20,40       
*NGEN,NSET=EDGE3
1,801,40
*NGEN,NSET=EDGE4
21,821,40
*NSET,NSET=EDGE
EDGE1,EDGE2,EDGE3,EDGE4
**     
** Define a node set for output
**
*NSET, NSET=NOUT
411  ,    
**
** Define stiffeners
**
*NODE, NSET=STIFFN      
4201,0.1, 0.0, 0.5       
4221,0.1, 2.0, 0.5      
4401,0.1, 0.0, 1.0      
4421,0.1, 2.0, 1.0      
4601,0.1, 0.0, 1.5      
4621,0.1, 2.0, 1.5      
**Generate inner edges of stiffeners    
*NGEN,NSET=ST1EDGE1     
4201,4221,1     
*NGEN,NSET=ST2EDGE1     
4401,4421,1     
*NGEN,NSET=ST3EDGE1     
4601,4621,1     
** Define node sets on plate for outer edge of stiffeners       
*NSET, NSET=ST1EDGE2, GENERATE  
201,221,1       
*NSET, NSET=ST2EDGE2, GENERATE  
401,421,1       
*NSET, NSET=ST3EDGE2, GENERATE  
601,621,1       
*NFILL  
ST1EDGE2,ST1EDGE1,2,2000
*NFILL  
ST2EDGE2,ST2EDGE1,2,2000
*NFILL  
ST3EDGE2,ST3EDGE1,2,2000
**      
** Define master element type for plate (with associated nodes) 
** and generate shell elements  
*ELEMENT,TYPE=S4R,ELSET=PLATE       
1,1,2,42,41     
*ELGEN,ELSET=PLATE      
1,20,1,1,20,40,20       
** Define master element type for stiffeners and generate       
*ELEMENT,TYPE=S4R,ELSET=STIFF1       
1001, 201,2201,2202,202 
*ELGEN,ELSET=STIFF1     
1001,20,1,1,2,2000,20   
*ELEMENT,TYPE=S4R,ELSET=STIFF2       
2001, 401,2401,2402,402 
*ELGEN,ELSET=STIFF2     
2001,20,1,1,2,2000,20   
*ELEMENT,TYPE=S4R,ELSET=STIFF3       
3001, 601,2601,2602,602 
*ELGEN,ELSET=STIFF3     
3001,20,1,1,2,2000,20   
** Define elset for el history output   
** Elements on central stiffener
*ELSET, ELSET=STIFFMAX  
2009, 2010, 2029, 2030   
**      
*SHELL SECTION,MATERIAL=STEEL,ELSET=PLATE,OFFSET=SPOS 
0.025   , 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF1     
0.0125  , 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF2     
0.0125  , 
*SHELL SECTION,MATERIAL=STEEL,ELSET=STIFF3     
0.0125  , 
**
*MATERIAL,NAME=STEEL
*ELASTIC
210.0E9,.3      
*PLASTIC
300.0E6, 0.000
350.0E6, 0.025
375.0E6, 0.100
394.0E6, 0.200
400.0E6, 0.350
*RATE DEPENDENT
40.0,5.0
*DENSITY
7800.0, 
*DAMPING, ALPHA=50.0, BETA=0.0
**
*BOUNDARY       
EDGE, ENCASTRE 
** Specify time variation for blast load
*AMPLITUDE, NAME=BLAST  
0.0, 0.0, 1.0E-03, 7.0E5, 10E-03, 7.0E05, 20E-03, 0.0, 50E-03, 0.0    
*STEP   
 Apply blast loading    
** Explicit analysis with a time duration of 50 ms
*DYNAMIC, EXPLICIT      
 , 50E-03       
** Apply distributed load (surface pressure) to the element set PLATE   
*DLOAD, AMPLITUDE=BLAST 
PLATE, P, 1.0  
*MONITOR, NODE=411, DOF=1       
*OUTPUT, FIELD, NUMBER INTERVAL=25
*ELEMENT OUTPUT
S,PE
*NODE OUTPUT
U
*OUTPUT, HISTORY, TIME INTERVAL=1.0E-4
*ELEMENT OUTPUT, ELSET=STIFFMAX     
PEEQ, MISES, ERV,
*NODE OUTPUT, NSET=NOUT
U,V   
*ENERGY OUTPUT 
ALLKE, ALLSE, ALLWK, ALLPD, ALLIE, ALLVD, ALLAE, ETOTAL 
**
*NSET,NSET=QA_TEST
370,371,372,
410,411,412,
450,451,452,
*OUTPUT, FIELD, NUMBER INTERVAL=5, TIMEMARKS=YES
*NODE OUTPUT,NSET=QA_TEST
U
*OUTPUT, HISTORY, VARIABLE=PRESELECT, TIME INTERVAL=10E-03
*END STEP