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

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 x trench run, local strain-rate strengthening, and altered fracture mechanics, rather than the material being inherently stronger.

       

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