Skip to main content

Explosives Modeling for Engineers

Instructors

  • Paul Du Bois
  • Dr. Len Schw­er

Price

  • $200
  • $100 for students

What's Included

  • One day of in­struc­tion
  • Class notes
  • Thir­ty-day de­mo li­cense
  • Con­ti­nen­tal break­fasts
  • Lunch­es

Explosives Modeling for Engineers

Prerequisites

You should be fa­mil­iar with LS-DY­NA®.

Syllabus

LS-DY­NA sim­u­la­tions in­volv­ing ex­plo­sives can be mod­eled on sev­er­al en­gi­neer­ing lev­els from the sim­ple ap­pli­ca­tion of equiv­a­lent pres­sure his­to­ries us­ing *LOAD_­BLAST_­EN­HANCED, the ex­plic­it in­clu­sion of ex­plo­sive charges us­ing an Equa­tions-of-State and det­o­na­tion with *INI­TIAL_­DET­O­NA­TION, and the det­o­na­tion of the ex­plo­sive due to im­pact us­ing *EOS_­IG­NI­TION_­AND_­GROWTH_­OF_­RE­AC­TION_­IN_­HE. The in­tend­ed use of the mod­el re­sults de­ter­mines the ap­pro­pri­ate de­gree of mod­el so­phis­ti­ca­tion.

Mod­el­ing ex­plo­sives is anal­o­gous to ma­te­r­i­al mod­el­ing: LS-DY­NA of­fers sev­er­al mod­els and you need to se­lect an ap­pro­pri­ate mod­el based on both ap­plic­a­bil­i­ty and the avail­abil­i­ty of ap­pro­pri­ate in­put pa­ra­me­ter da­ta. While the se­lec­tion of an ap­pro­pri­ate ma­te­r­i­al mod­el is of­ten dri­ven by the avail­abil­i­ty of the in­put pa­ra­me­ter da­ta, an­a­lysts over time de­vel­op a more in depth
the­o­ret­i­cal knowl­edge of some ma­te­r­i­al mod­els, a per­son­al li­brary of ma­te­r­i­al pa­ra­me­ters, and, thus, a pref­er­ence for cer­tain ma­te­r­i­al mod­els. How­ev­er, when it comes to ex­plo­sive mod­el­ing, most en­gi­neers re­ly sole­ly on lit­er­a­ture ref­er­ences for equa­tions-of-state with pro­vid­ed da­ta.Typ­i­cal­ly, lit­tle ef­fort is spent on ac­quir­ing any the­o­ret­i­cal knowl­edge of the equa­tions-of-state be­ing used, nor how the in­put pa­ra­me­ters were de­ter­mined.

Such cur­so­ry knowl­edge of ex­plo­sives is of­ten deemed ac­cept­able and may like­ly be ac­cept­able in sim­u­la­tions in­volv­ing fair­ly large dis­tances be­tween the ex­plo­sive and tar­get. How­ev­er, for sim­u­la­tions where the ex­plo­sive charge and tar­get are not dis­tant, or for sym­pa­thet­ic det­o­na­tion of ex­plo­sives, a more thor­ough knowl­edge of ex­plo­sive mod­el­ing is re­quired.

This class fo­cus­es on the ap­pli­ca­tion of LS-DY­NA to mod­el­ing ex­plo­sives. The mod­el­ing meth­ods are il­lus­trat­ed through case stud­ies with suf­fi­cient math­e­mat­i­cal the­o­ry to pro­vide you with ad­e­quate knowl­edge to con­fi­dent­ly ap­ply the ap­pro­pri­ate mod­el­ing method.

Content

  1. Open­ing Re­marks (Len)
  2. Det­o­na­tion Waves and Ex­plo­sives (Paul)
  3. Fly­er Plate Cal­i­bra­tion of De­tasheet EOS (Len)
  4. Im­pact Det­o­na­tion via Ig­ni­tion and Growth of Re­ac­tion in High Ex­plo­sives (Len)
  5. Dri­ven Shocks (Paul)
  6. Equiv­a­len­cy of TNT (Len)
  7. Sim­u­la­tion of Pro­pel­lants with Ap­pli­ca­tion to In­te­ri­or Bal­lis­tics (Paul)
  8. In­tro­duc­tion to Non-Ide­al and Af­ter Burn­ing of Ex­plo­sives (Len)