Static vs Dynamic Collisions: Explained for Side Impact Modeling

In summary, the conversation discusses the difference between a static and dynamic collision and how it relates to a side impact crash between two cars. The speaker is questioning why a static collision would not accurately model the crash. The other person explains that it is because the momentum of the colliding object must be taken into account. They also mention the importance of accuracy in FEA analysis.
  • #1
abkdt41
4
0
just wondering if someone could explain the difference between a static and dynamic collision is. I am trying to model a side impact crash between 2 cars and just wondering why it would not be accurate using a static collision. i.e. applying a static load on the door in an FEA
 
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  • #2
It isn't static because you have to account for the momentum of the object that is colliding with the door.

Static results would not be appropriate for this analysis.

EDIT: One thing that I have learned over the years of FEA analysis is this: If you are going to take the time to do an FEA analysis be as accurate as practical. IT PAYS OFF.

Thanks
Matt
 
Last edited:

1. What is the difference between static and dynamic collisions?

Static collisions occur when two objects collide and are not in motion, while dynamic collisions occur when two objects are in motion and collide with each other.

2. How are static and dynamic collisions relevant to side impact modeling?

In side impact modeling, understanding the type of collision is important in predicting the effects of a collision and designing safety measures to minimize impact forces.

3. How are forces calculated differently in static and dynamic collisions?

In static collisions, the forces are calculated based on the masses and velocities of the objects before and after the collision. In dynamic collisions, the forces are calculated based on the rate of change of momentum.

4. Can both static and dynamic collisions occur in a single impact?

Yes, it is possible for both types of collisions to occur in a single impact. For example, in a side impact collision, the initial impact between the two vehicles may be static, but the resulting motion of the vehicles after the impact is dynamic.

5. How do side impact models take into account both static and dynamic collisions?

Side impact models use advanced mathematical equations and computer simulations to analyze the forces and motion of the vehicles involved in a collision. These models take into account both static and dynamic collisions to accurately predict the outcome of the impact and inform safety measures.

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