Introduction to LS-DYNA®

Class Format

This class is cur­rent­ly be­ing giv­en through the An­sys Learn­ing Hub. See https:/­/­www.an­sys.com/­ser­vices/­learn­ing-hub for more in­for­ma­tion.

Prerequisites

• You should be fa­mil­iar with ba­sic fi­nite el­e­ment meth­ods.

Syllabus

This course cov­ers the ba­sic ca­pa­bil­i­ties of LS-DY­NA. De­tailed de­scrip­tions and re­quire­ments are giv­en for da­ta prepa­ra­tion with ex­am­ples. Pre- and post-pro­cess­ing us­ing LS-Pre­Post^® is al­so cov­ered. This course is rec­om­mend­ed for those who per­form non­lin­ear sta­t­ic and tran­sient sim­u­la­tions. At­ten­dees work­ing in near­ly all fields of en­gi­neer­ing will ben­e­fit. This course is a pre­req­ui­site for the ad­vanced cours­es cov­er­ing the mul­ti-physics ca­pa­bil­i­ties which in­clude com­press­ible and in­com­press­ible flu­ids, the airbag par­ti­cle method, Ar­bi­trary La­grangian-Euler­ian (ALE) flu­ids, ther­mal, acoustics, vi­bro-acoustics, met­al form­ing, elec­tro­mag­net­ics, dis­crete el­e­ments, fail­ure, fre­quen­cy re­sponse method­ol­o­gy, and iso­ge­o­met­ric analy­sis.

Content

1. Course Out­line
2. His­to­ry
3. Fi­nite El­e­ment Sim­u­la­tion
   1. Sam­ple LS-DY­NA Con­fer­ence Pre­sen­ta­tions
   2. Sam­ple Sim­u­la­tions
4. FE Analy­sis (pre-proces­sors, solvers, post-proces­sors)
5. De­tailed Ex­am­ple
   1. LS-DY­NA In­put Deck
   2. Us­ing LS-Pre­Post
   3. De­tails of Post-Pro­cess­ing
6. De­tailed Ca­pa­bil­i­ties – Key­word For­mat
7. Ma­te­r­i­al Non­lin­ear­i­ty
8. Run­ning LS-DY­NA
   1. Ex­e­cu­tion and Out­put Files
      1. ASCII
      2. Bi­na­ry
9. Out­put Con­trol
10. FE Mod­el­ing Tech­niques
    1. En­gi­neer­ing a FEA Mod­el
    2. El­e­ment Se­lec­tion
       1. Dis­crete (for­mu­la­tion of elas­tic and non­lin­ear elas­tic spring)
       2. Shell (de­scrip­tion of the var­i­ous shell for­mu­la­tions)
       3. Sol­id (de­scrip­tion of the var­i­ous sol­id for­mu­la­tions)
       4. Thick Shells
    3. Bound­ary and Ini­tial Con­di­tions, Sym­me­try
    4. Mod­el­ing for Phys­i­cal Phe­nom­e­non
    5. Ad-Hoc Guide­lines
    6. How to tell if your re­sults are cor­rect
       1. Er­ror, De­bug­ging, and Oth­er Use­ful In­for­ma­tion (d3hsp)
11. Time In­te­gra­tion
    1. The Equa­tions of Mo­tion
       1. Im­plic­it
       2. Ex­plic­it
12. Ex­plic­it Time In­te­gra­tion
    1. Time Step Cal­cu­la­tion
13. Se­lec­tive­ly-Re­duced In­te­gra­tion
14. Hour­glass Phe­nom­e­non
15. Con­tact and Slide Sur­faces
    1. Fric­tion
16. Damp­ing
17. Restart
18. Qua­si-Sta­t­ic Sim­u­la­tions
    1. Why sta­t­ic analy­sis with ex­plic­it code
19. Mass Scal­ing