Penetration Modeling with LS-DYNA®

Instructors

• Dr. Len Schw­er
• Paul Du Bois

Penetration Modeling with LS-DYNA®

Prerequisites

• You should be fa­mil­iar with LS-DY­NA.
• We strong­ly rec­om­mend tak­ing the class "Meth­ods & Mod­el­ing Tech­niques: Pre­req­ui­sites for Blast & Pen­e­tra­tion Sim­u­la­tion."

Syllabus

LS-DY­NA is well suit­ed for sim­u­lat­ing pen­e­tra­tion events. With LS-DY­NA, you can sim­u­late high en­er­gy events, such as pen­e­tra­tion and per­fo­ra­tion, us­ing any com­bi­na­tion of La­grange, Euler­ian (MM-ALE) and Mesh­free meth­ods. These high en­er­gy events are typ­i­cal­ly as­so­ci­at­ed with large de­for­ma­tions, dam­age, and fail­ure both on the ma­te­r­i­al and struc­tur­al lev­el. Dur­ing the past decade suc­cess­ful mod­el­ing of such dam­age and fail­ure has moved steadi­ly from a ‘Black Art’ to a wide­ly ac­cept­ed en­gi­neer­ing prac­tice.

In this class, we fo­cus on us­ing LS-DY­NA to sim­u­late high en­er­gy events. We il­lus­trate the analy­sis meth­ods (and mod­el­ing) through case stud­ies. We al­so em­pha­size mod­el­ing tech­niques. To do this, we give:

• guide­lines for which tech­nique(s) to se­lect,
• in­sights in­to which tech­niques work well, and
• when pos­si­ble, pit­falls in mod­el­ing choice se­lec­tions.

We present enough math­e­mat­i­cal the­o­ry for each tech­nique for you to con­fi­dent­ly and ap­pro­pri­ate­ly ap­ply them. How­ev­er, this train­ing class is not a sub­sti­tute for the in-depth treat­ments pre­sent­ed in the as­so­ci­at­ed LS-DY­NA train­ing class­es, mean­ing ALE/­Euler­ian & Flu­id Struc­ture In­ter­ac­tion, Ad­vanced ALE, and Smoothed Par­ti­cle Hy­dro­dy­nam­ics in LS-DY­NA.

Content

Day 1

1. Open­ing Re­marks (Len)
2. In­tro­duc­tion to Pen­e­tra­tion Me­chan­ics – Ero­sion Tech­niques (Len)
3. Con­sti­tu­tive, Fail­ure, & Dam­age Mod­el­ing:
1. Met­als – John­son-Cook Mod­el – Pa­ra­me­ter Iden­ti­fi­ca­tion (Len)
2. Dam­age & Fail­ure Mod­el­ing for Met­als (Paul)
3. Dam­age & Fail­ure Mod­el­ing for UD Com­pos­ites (Paul)
4. Equa­tions-of-State for Met­als (Paul)
5. Con­crete & Ge­o­ma­te­ri­als – Sim­pli­fied In­put Con­crete Mod­els (Len)

Day 2

1. Ex­plo­sive­ly Formed Pro­jec­tiles & Shaped Charges (Paul)
2. Smooth Par­ti­cle Hy­dro­dy­nam­ics (SPH) — A Primer (Len)
3. SPH work­shop with Plate Per­fo­ra­tion Com­par­i­son of SPH & MM-ALE (Len)
4. Pen­e­tra­tion Work­shop — Em­bed­ded Pro­jec­tile Det­o­na­tion (Paul)