Ansys Explicit: Dynamics

: Always check the Solution Output for the energy balance. High "hourglass energy" (numerical noise) compared to internal energy indicates your mesh needs refinement.

Depending on your specific application, Ansys offers different "formulations": ansys explicit dynamics

| Aspect | Detail | |--------|--------| | | Explicit central difference | | Timestep | Microseconds, limited by mesh & sound speed | | Ideal for | Impact, drop test, penetration, crash, failure | | Not for | Quasi-static, slow vibrations (>1 sec events) | | Material models | Good (Johnson-Cook, Cowper-Symonds, EOS, damage) | | Contact | Automatic, eroding, tiebreak, spotwelds | | Typical run times | Hours to days (HPC often needed) | | Skill level | Intermediate to advanced (needs mechanics intuition) | : Always check the Solution Output for the energy balance