Tutorial 1 : Create an LS-DYNA input deck for a ball impacting a plate

Transcription

1 Tutorial 1 : Create an LS-DYNA input deck for a ball impacting a plate Case description: Ball: solid elements, rigid material Plate: shell elements, edges constrained Ball Initial Velocity: 10mm/ms Files required: none Step 1: Create the plate 1. FEM Element and Mesh Shape Mesher 2. select Entity: 4N-Shell 3. enter P1=-150,-150,0 4. enter P2= 150,-150,0 5. enter P3= 150, 150,0 6. enter P4=-150, 150,0 7. enter NxNo.=16 8. enter NyNo.=16 9. enter Target Name: plate 10. click Create 11. click Accept

2 Step 2: Create the ball 1. select Entity: Sphere_Solid 2. enter Radius=50 3. enter density=6 4. enter Center X=0 5. enter Center Y=0 6. enter Center Z=51 7. enter Target Name: ball 8. click Create 9. click Accept 10. click Done

3 Step 3: Define materials FEM Model and Part Keyword Manager a. define rigid material for the ball 1. select MAT 020-RIGID from the list 2. click Edit 3. click NewID in the KEYWORD INPUT popup form 4. enter TITLE: rigid material for ball 5. enter RO=7.83e-6 6. enter E= enter PR= click Accept 9. click Done

4 b. define deformable material for the plate 1. select 024-PIECEWISE_LINEAR_PLASTICITY from the list 2. click Edit 3. click NewID in the KEYWORD INPUT popup form 4. enter TITLE: material for plate 5. enter RO=7.83e-6 6. enter E= enter PR= enter SIGY= enter ETAN= click Accept 11. click Done

5 Step 4:Define section properties a. define section property for the ball 1. select SECTION SOLID from the list 2. click Edit 3. click NewID in the KEYWORD INPUT popup form 4. enter TITLE: rigid section 5. click Accept 6. click Done b.define section property for the plate 1. select SHELL from the list 2. click Edit 3. click NewID in the KEYWORD INPUT popup form 4. enter TITLE: plate section 5. enter NIP=5 6. enter T1=1 and hit Return (assigns T2,T3,T4=T1) 7. click Accept 8. click Done

6 Step 5:Assign material and section properties 1. FEM Model and Part Part Data 2. select Assign 3. select S1 plate from the list 4. click SECID in the bottom panel 5. select 2 plate section and click Done in Link SECTION Dialog 6. click MID in the bottom panel 7. select 2 material for plate and click Done in Link MAT Dialog 8. click Assign Part: Apply in the bottom panel

7 9. select H2 ball from the side panel list 10. click SECID in the bottom panel 11. select 1 rigid section and click Done in Link SECTION Dialog 12. click MID in the bottom panel 13. select 1 rigid material for b and click Done in Link MAT Dialog 14. click Assign Part: Apply in the bottom panel

8 Step 6: Verify material and section properties 1. select Prop in the side panel 2. select S1 plate from the side panel list 3. select Section in the bottom panel 4. verify section data 5. select Material in the bottom panel 6. verify material data 7. select H2 ball from the side panel list 8. select Section in the bottom panel 9. verify section data 10. select Material in the bottom panel 11. verify material data

9 Step 7: Specify boundary conditions 1. FEM Model and Part Create Entity 2. select Cre 3. select Set 4. activate X 5. activate Y 6. activate Z 7. click Edge render button 8. click Visible in gen select panel 9. click Apply 10. click ShaEle render button

10 Step 8: Specify initial velocity 1. select Initial Velocity 2. select Cre 3. enter Vx=0 4. enter Vy=0 5. enter Vz= select ByPart in gen select panel 7. pick the ball in the graphics window 8. click Apply

11 Step 9: Create part set for contact 1. select Set Data *SET_PART from the list 2. select Cre 3. enter Title: contact part set 4. pick the plate and pick the ball in the graphics window 5. click Apply 6. select Show 7. click None

12 Step 10: Define contact 1. select CONTACT AUTOMATIC_SINGLE_SURFACE from the list 2. click Edit 3. click NewID in the KEYWORD INPUT popup form 4. enter TITLE: contact definition 5. select SSTYP=2 6. click the SSID link button (dot) 7. select 1 contact part set and click Done in Link SET Dialog 8. enter MSID=0 9. click Accept 10. click Done

13 Step 11:Set termination time 1. select *Control TEMINATION from the list 2. click Edit 3. enter ENDTIM=10

14 4. click Accept 5. click Done Step 12: Set d3plot frequency 1. select DATABASE BINARY_D3PLOT from the list 2. click Edit 3. enter DT=1 (output complete state every 1ms) 4. click Accept 5. click Done Step 13: Set ASCII time history outputs 1. select DATABASE ASCII_option from the list 2. click Edit 3. enter Default DT=0.1

15 4. activate GLSTAT (global statistics) 5. activate MATSUM (material energy summary) 6. activate SLEOUT (sliding interface energy) 7. click Accept 8. click Done

16 Step 14: Save the model 1. File Save Keyword 2. enter Filename: ball_plate.k 3. click Save If the preceding steps were followed correctly, your input file should look like this: ball_plate.k