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RECENT DEVELOPMENTS IN RADIOSS

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  • 1. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.RECENT DEVELOPMENTS IN RADIOSSBlock Format Francis Arnaudeau Altair Development France 5th EHTC 7-9 November, 2011 Bonn
  • 2. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. AGENDA SAFETY CONTACT SPOTWELD MATERIAL CRACK PROPAGATION ADVANCED MASS SCALING STAMPING HYBRID MPP HYBRID MPP RADIOSS
  • 3. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. ADVANCED SHELL IIHS SIDE MDB (with air effect) RADIOSS
  • 4. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. ADVANCED CHILD DUMMIES QS Q1 Q1.5 Q6 RADIOSS
  • 5. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.ADVANCED PEDESTRIAN LEGFORM IMPACTOR FLEXPLI RADIOSS
  • 6. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.SAFETY MODELS ROADMAP RADIOSS
  • 7. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. AIRBAGS • /MONVOL/FVMBAG1  /MONVOL/AIRBAG1 • NEW FABRIC FORMULATION WRITING • FVMBAG : gas mesh on reference state V11.0.202 RADIOSS
  • 8. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Contact Interfaces • TYPE 20 • General interface solving node/surface, surface/surface and edge/edge contact • Slave node is duplicated after impact into: • An anchorage node at impact point • The true slave position • Benefits : • Zero-gap • Initial penetrations allowed • Solve time-step issues of type7 • TYPE 21 • Rigid Tools can rotate: motion can be defined thru a skew (non global axis) • Thermal conduction, same as TYPE7 • Heat transfer dependence on contact pressure • Friction temperature dependent RADIOSS
  • 9. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HEXA SPOTWELD 3 (normal) 2 8 7 5 6 1 4 3 1 2 • Zero thickness is allowed • Specific material /MAT/LAW59 • Failure criteria /FAIL/CONNECT Benefits : • Better fit with physical geometrical properties • Better distribution of forces on welded parts • Enables higher quality rupture criteria • High time step RADIOSS
  • 10. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. CRASH-BOX Spotweld Models Comparison • Spring Type Beam + Tied Interfaces • Hexa + Tied Interfaces RADIOSS
  • 11. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. MATERIAL LAWS • /MAT/LAW42 Available for shells • /MAT/LAW69 Tabulated input for hyper-elastic material (LAW42) • /MAT/LAW72 Hill law for solids with MMC failure criterion (MIT) • /MAT/LAW73 Thermal Hill orthotropic material for shells (LAW43) • /MAT/LAW74 Thermal tabulated Hill orthotropic law for solids • /MAT/LAW75 Porous Material Herrmann P-a • /MAT/LAW78 Yoshida Uemori RADIOSS
  • 12. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. EQUATION OF STATE MODELS 0,5 0,45 0,4 0,35 Pressure 0,3 0,25 Tillotson 0,2 Radioss 0,15 0,1 0,05 0 0,825 0,850 0,875 0,900 0,925 0,950 0,975 1,000 P  A( )  B( ) E    1 0 • /EOS/POLYNOMIAL • /EOS/GRUNEISEN • /EOS/TILLOTSON • /EOS/PUFF (11.0.201) • /EOS/SESAME (11.0.201) RADIOSS
  • 13. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. CRACK MODELIZATION X-FEM  Compatible with Shells (4nodes SHELL and 3nodes SH3N)  Crack initialization and propagation models (failure criteria): • Tuler-Butcher (/FAIL/XFEM_TBUTCH) • Johnson-Cook (/FAIL/XFEM_JOHNS) • Forming Limit Diagram (/FAIL/XFEM_FLD)  Crack visualization with HYPERVIEW  Compatible HYBRID MPP  RADIOSS Version 11.0.202 RADIOSS
  • 14. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. PLATE WITH HOLE Imposed Velocity Initial Crack 2 Crack Propagation : Initial Crack 1 Tuler Butcher Failure Model Imposed Velocity #---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----| /MAT/PLAS_JOHNS/1 Material_A # Init. dens. Ref. dens. 7.8E-9 0 # E Nu 210000 .3 # a b n Eps_max sigmax 400 550 .5 0 336.60001 # c EPS0 Icc Fsmooth F_CUT 0 0 0 0 0 # m T_melt rhoCp T_i 0 0 0 0 #---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----| /FAIL/XFEM_TBUTCH/1 # LAMBDA K SIGR ISHELL IBRIT 2 .5 336 1 0 # BRIT_B BRIT_C 0 0 #---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----| RADIOSS
  • 15. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. SIDE CRASH MODEL SUMMARY Nb Elements 1 340 000 RADIOSS Version 11.0 Run #1 Run #2 Run #3 Run #4 Nb Cores (HMPP) 32 32 32 96 Nb Cores/Domain (SMP) 1 1 1 4 Nb Domains (SPMD) 32 32 32 24 Radioss Precision Version DP SP SP SP Time Step Control /DT/NODA/CST /DT/NODA/CST /DT/AMS /DT/AMS Target Time Step 0.5 s 0.5 s 10 s 10 s Nb Cycles 202415 202675 10101 10101 Elapsed Time (hours) 6.4 4.4 2.1 0.9 Ratio (Speed Up) 1.4 2.1 2.3 RADIOSS
  • 16. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. STAMPING • NUMISHEET 2008 S-RAIL • PERFORMANCE RADIOSS
  • 17. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HYPERFORM • Multi-stage Forming Process Automation • Yoshida Uemori Material Law • Automatic Stamping Initialization for Crash Models • Hot Forming RADIOSS
  • 18. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HYBRID MPP Value proposition “Combine the benefit of both RADIOSS parallel versions inside a unique code with enhanced performance and flexibility” Customer Benefits Reduce simulation cost thru maximized scalability & performance Increase flexibility to customer’s needs & hardware resources evolution High Quality with full repeatability of SMP & SPMD numerical results Additional cost reduction thru easiest maintenance Implementation Challenges Mix MPI programming and OpenMP multithreading Keep ease of use of SMP with care of MPI installation Keep ease of debugging of SPMD and its deterministic behavior RADIOSS
  • 19. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. FRONT CRASH MODEL SUMMARY Nb Elements 5 800 000 RADIOSS Version 11.0 Time Step Control /DT/NODA/CST Target Time Step 0.5 ms Run #1 Run #2 Run #3 Nb Cores (HMPP) 64 64 576 Nb Cores/Domain (SMP) 4 4 6 Nb Domains (SPMD) 16 16 96 Radioss Precision Version DP SP SP Nb Cycles 201481 201070 201070 Elapsed Time (hours) 35.7 27.6 6.9 Ratio (Speed Up) 1.3 4 RADIOSS
  • 20. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. FRONT CRASH Comparison between 576 cores (SP) and 64 cores(DP) RADIOSS
  • 21. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. FRONT CRASH Comparison between 576 & 64 cores (Single Precision Version) RADIOSS
  • 22. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. CRASH CASE STUDY15 Million Element - 100 msPlatform Intel CRT Data Center in Dupont WA Intel SR1600UR 144 nodes system Dual socket x 6 core Intel Xeon X5570 @ 2.93 GHz 24GB 1333 DDR3 memory 1-GbE, QDR IB Mellanox RHEL5 update 3Hybrid 144 SPMD x 12 SMPSingle Precision 1728 cores in totalDT/NODA/CST Mean Time Step 0.2µs 502107 cyclesPerformance 11,4 hours RADIOSS
  • 23. Copyright © 2011 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. RADIOSS VERSION 11.x.x SUMMARY• AMS is a cost effective solution for low speed impact, quasi static analysis : Roof Crush, Stamping, …• RADIOSS is a competitive solution for Stamping, AMS results are more accurate than results using classical Adaptivity• Scalability, Quality, Repeatability applies to RADIOSS Hybrid MPP• Very small differences between single and double precision version• 5 Million elements Crash in few hours• New Safety tools: Q1, Q1,5, Q6, FLEXPLIOne solver, One result, One partnerONE product with complete capabilities RADIOSS

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