1 / 26

WORKSHOP 4 PIPE CRUSH ANALYSIS

WORKSHOP 4 PIPE CRUSH ANALYSIS. Move 2 in the -Y. R=4. Rigid Body 2. Pipe. R=3. Rigid Body 1. Move 2 in the Y. Chapter Overview In this exercise, a model of a cylindrical pipe is modeled as being crushed between rigid bodies.

bina
Download Presentation

WORKSHOP 4 PIPE CRUSH ANALYSIS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. WORKSHOP 4 PIPE CRUSH ANALYSIS

  2. Move 2 in the -Y R=4 Rigid Body 2 Pipe R=3 Rigid Body 1 Move 2 in the Y • Chapter Overview • In this exercise, a model of a cylindrical pipe is modeled as being crushed between rigid bodies. • This model is created using 2D shell elements to model the pipe, and 2D rigid surfaces above and below the pipe.

  3. Objective • Large Deflections/Strains analysis • Elastic-Plastic material model • Rigid – Deformable Contact • Required • A file named crush.bdf in your working directory (Ask your instructor for it if you don’t see it before starting)

  4. Step 1. Open a New Database a b Open a new database , Structures Workspace. • Launch SimXpert. • Select Structures.

  5. a b c d f e Step 2. Set Unit Set the units to English. • Select Tools / Options • Select Units Manager. • Click Standard Units. • Select the line containing English Units (in, lb, s…) • Click OK • Click Apply.

  6. Step 3. Import the crushing.bdf b c a Import the required geometry. • Select File / Import / Nastran • Select crushing.bdf as the File name. • Click Apply.

  7. Step 4. Delete Existing Groups and Contacts Since we want to practice the definitions of contact bodies, we will delete existing related objects firstly • In Model Browser, right click all existing Groups and Conacts, and select Delete command to delete them one by one a

  8. Step 5. Define Plastic Material Modify the material with elastic properties. • In Model Brower, double click Material / MAT1_1_crush.bdf • Change Steel as the Material Name. • Click Advanced icon. • Click Add Constitutive Model / Elasto Plastic b c e d a

  9. Step 5. Define Plastic Material (cont.) Create the material aluminum_1100, with elastic properties. • Select Nonlinear Data Input: Perfectly Plastic. • Enter 36000 in Initial Yield Stress field • Click OK. d e e f f g

  10. a Step 6. LBC:Fix Pipe Select nodes to fix pipe mesh. • On LBC’s tab, select Fixed from the Constraint group • Name : fixed_end • Select nodes at the two ends of the pipe • Click OK. b c d

  11. Step 7. Create contact body - Contact_mid a Create contact body for pipe mesh • On LBC’s tab, select Contact \ Deformable Body (Structural) • Enter Contact_mid as Name • Click Pick Entities field • Choose PSHELL_crush.bdf from Model Browser • Click OK b c d e

  12. Step 8. Create contact body – Contact_top a Create contact body for pipe mesh • On LBC’s tab, select Contact \ Rigid Body (Structural) • Enter Contact_topas Name • Click Pick Entities field • keep only Pick Surfaces optionfrom Pick Filters toolbar • Select the 3 surfaces as the graph below • Select Motion Tab • Switch Motion Control option to Position • Enter Position data as X=0,Y=-2,Z=0 • Click OK d b c f g e h i

  13. Step 9. Check contact normal - Contact_top • Open the Model Browser • Right click Contact \ Contact_top \ PropertiesClick Display • Click Body Tab • Click Display Inward Normals, if it’s necessary, click Reverse Inward Normals. Inward Normal should looks like the one in the following picture. k k l m d

  14. Step 10. Create contact body – Contact_bottom a Create contact body for pipe mesh • On LBC’s tab, select Contact \ Rigid Body (Structural) • Enter Contact_bottom as Name • Click Pick Entities field • keep only Pick Surfaces optionfrom Pick Filters toolbar • Select the 3 surfaces as the graph below • Select Motion Tab • Switch Motion Control option to Position • Enter Position data as X=0,Y=2,Z=0 • Click OK d b c f g h i e

  15. Step 11. Check contact normal-contact_bottom • Open the Model Browser • Right click Contact \ Contact_bottom \ PropertiesClick Display • Click Body Tab • Click Display Inward Normals, if it’s necessary, click Reverse Inward Normals. Inward Normal should looks like the one in the following picture. l k m d

  16. Step 12. Create Contact Table a Create Contact Table • On LBC’s tab, select Contact \ Table • Click OK b

  17. Step 13. Create the Analysis Job Setup and launch the Analysis. • Right-click FileSet and select Create new Nastran Job. • Enter Pipe_Crush as the Job Name. • Solution Type: Implicit Nonlinear Analysis (SOL600). • Click OK a b c d

  18. Step 14. Setup Analysis Parameters Setup the Analysis Parameter • Click right mouse button, Simulation / Pipe_Crush / LoadCases / DefaultLoadCase / Properties • Select SOL600SubcaseNonlinearGeomParameter dialog • Switch Nonlinear Geometric Effects option to Large Displacement/Large Strains • Click Apply • Click Close a b c d e

  19. Step 15. Select Contact Table Select Contact Table. • Right click on Simulations / Pipe_crush / Load Cases / DefaultLoadCase / Select BCTABLE • Click BCTABLE_1 from Model Browser / Contact • Click OK. b a

  20. Step 16. Select Load/BCs Select Load/BCs. • In Model Browser, right click Simulation / Pipe_Crush / Load Cases / DefaultLoadCase / Load/Boundaries / Select Lbc Set • Select DufaultLbcSet • Click OK.. b c a

  21. Step 17. Output Requests-Element Results • Right Click on Output Requests to add the following outputDisplacement (1) & Total Strain Tensor (301) Plastic Strain Tensor (321) Cauchy Stress Tensor (341) a

  22. Step 18. Run this job Run this job • Open Model Browser, click right mouse button at Pipe_Crush,select Run. a

  23. Step 19. Attach Results Attach results files, *.t16 • Select File \ Attach Results\ Result Entities… • Choose pipe_crush.marc.t16 • Click OK b a c

  24. Step 20. Display Results: Deformation Display Deformation • Plot type: Deformation • Result Cases: select the last one • Result Type: Displacement,Translation • Click Update d c a b

  25. Step 21. Display Results: Stress Display Stress • Plot type: Fringe • Result Cases: select the last one • Result type: Result Type: Stress,Cauchy • Derivation: von Mises • Click Update a e d c b

More Related