LSTC LS-DYNA 12.1

LS-DY­NA is a gen­er­al-pur­pose fi­nite el­e­ment pro­gram ca­pa­ble of sim­u­lat­ing com­plex re­al world prob­lems. It is used by the au­to­mo­bile, aero­space, con­struc­tion, mil­i­tary, man­u­fac­tur­ing, and bio­engi­neer­ing in­dus­tries. LS-DY­NA is op­ti­mized for shared and dis­trib­uted mem­o­ry Unix, Lin­ux, and Win­dows based, plat­forms, and it is ful­ly QA’d by LSTC. The code’s ori­gins lie in high­ly non­lin­ear, tran­sient dy­nam­ic fi­nite el­e­ment analy­sis us­ing ex­plic­it time in­te­gra­tion.Unlimited Cores and CPUS.

“Non­lin­ear” means at least one (and some­times all) of the fol­low­ing com­pli­ca­tions:

• Chang­ing bound­ary con­di­tions (such as con­tact be­tween parts that changes over time)
• Large de­for­ma­tions (for ex­am­ple the crum­pling of sheet met­al parts)
• Non­lin­ear ma­te­ri­als that do not ex­hib­it ide­al­ly elas­tic be­hav­ior (for ex­am­ple ther­mo­plas­tic poly­mers)

“Tran­sient dy­nam­ic” means an­a­lyz­ing high speed, short du­ra­tion events where in­er­tial forces are im­por­tant. Typ­i­cal us­es in­clude:

• Au­to­mo­tive crash (de­for­ma­tion of chas­sis, airbag in­fla­tion, seat­belt ten­sion­ing)
• Ex­plo­sions (un­der­wa­ter Naval mine, shaped charges)
• Man­u­fac­tur­ing (sheet met­al stamp­ing)

LS-DY­NA’s po­ten­tial ap­pli­ca­tions are nu­mer­ous and can be tai­lored to many fields. In a giv­en sim­u­la­tion, any of LS-DY­NA’s many fea­tures can be com­bined to mod­el a wide range of phys­i­cal events. An ex­am­ple of a sim­u­la­tion, which in­volves a unique com­bi­na­tion of fea­tures, is the NASA JPL Mars Pathfind­er land­ing sim­u­la­tion which sim­u­lat­ed the space probe’s use of airbags to aid in its land­ing. LS-DY­NA is one of the most flex­i­ble fi­nite el­e­ment analy­sis soft­ware pack­ages avail­able.

LS-DY­NA con­sists of a sin­gle ex­e­cutable file and is en­tire­ly com­mand line dri­ven. There­fore all that is re­quired to run LS-DY­NA is a com­mand shell, the ex­e­cutable, an in­put file, and enough free disk space to run the cal­cu­la­tion. All in­put files are in sim­ple ASCII for­mat and thus can be pre­pared us­ing any text ed­i­tor. In­put files can al­so be pre­pared with the in­stant aid of a graph­i­cal pre­proces­sor.

There are many third par­ty soft­ware prod­ucts avail­able for pre­pro­cess­ing LS-DY­NA in­put files. LSTC al­so de­vel­ops its own pre­proces­sor, LS-Pre­Post, which is freely dis­trib­uted and runs with­out a li­cense. Li­censees of LS-DY­NA au­to­mat­i­cal­ly have ac­cess to all of the pro­gram’s ca­pa­bil­i­ties, from sim­ple lin­ear sta­t­ic me­chan­i­cal analy­sis up to ad­vanced ther­mal and flow solv­ing meth­ods. Fur­ther­more, they have full use of LS-OPT, a stand­alone de­sign op­ti­miza­tion and prob­a­bilis­tic analy­sis pack­age with an in­ter­face to LS-DY­NA.

Capabilities

LS-DY­NA’s analy­sis ca­pa­bil­i­ties in­clude:

• Full 2D & 3D ca­pa­bil­i­ties
• Non­lin­ear dy­nam­ics
• Rigid body dy­nam­ics
• Qua­si-sta­t­ic sim­u­la­tions
• Nor­mal modes
• Lin­ear sta­t­ics
• Ther­mal analy­sis
• Flu­id analy­sis
  • Euler­ian ca­pa­bil­i­ties
  • ALE (Ar­bi­trary La­grangian-Euler­ian)
  • FSI (Flu­id-Struc­ture In­ter­ac­tion)
  • Navier-Stokes flu­ids
  • Com­press­ible flu­id solver, CESE (Con­ser­va­tion El­e­ment & So­lu­tion El­e­ment)
• FEM-rigid mul­ti-body dy­nam­ics cou­pling (MADY­MO, Cal3D)
• Un­der­wa­ter shock
• Fail­ure analy­sis
• Crack prop­a­ga­tion
• Re­al-time acoustics
• Im­plic­it spring­back
• Mul­ti-physics cou­pling
• Struc­tur­al-ther­mal cou­pling
• Adap­tive remesh­ing
• SPH (Smoothed Par­ti­cle Hy­dro­dy­nam­ics)
• EFG (El­e­ment Free Galerkin)
• Ra­di­a­tion trans­port
• EM (Elec­tro­mag­net­ism)

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