The simulation results of Johnson-Cook model under high temperatures in LSdyna

- November 15, 2025 at 2:44 pm
  
  1614607336
  Subscriber
  
  Hello, I hope someone can help answer my question.
  When conducting projectile impact tests using LS-DYNA with the Johnson-Cook model, why is the penetration velocity at high temperatures actually higher than that at room temperature? Is it due to the thermal softening effect? However, according to common knowledge, the strength of metallic materials decreases as temperature increases.
- November 18, 2025 at 3:52 am
  
  JoeyWunsch99
  Subscriber
  
  Increased penetration rates at elevated temperatures are due to a combination of thermal softening, local strain-rate strengthening, and altered fracture mechanics, rather than the material being inherently stronger.