A: yes.
In the View->Run Summary there is listed IMPACT and Separation
- Here are the values from the sample My First Project:
- 1) As you noted PSI1C and PSI2C are the IMPACT Angle
2) Note the summary also includes the INITIAL Conditions (see below) which may be the same heading angles as the IMPACT- unless pre-impact steer
- You use term APPROACH angle we use IMPACT angle since vehicles can approach and not hit!
- point where the vehicles are no longer in contact
- 4a) when the forces of collision interaction which cause accelerations goes above 1 G-unit it is considered IMPACT
- 4b) When the forces of the collision interaction which produce accelerations goes below 1 G-unit it is considered SEPARATION
- 4c) This assumption is based on the fact tire forces generally only produce accelerations below 1 G so if the accelerations are greater than 1 G, some other forces are occurring which means a COLLISION
6) If you apply simple momentum to these angles you may get differences from SMAC results- momentum generally considers the approach/departure angles applied at same location
- vehicles move between impact and separation
- 0.538 sec - 0.414 sec = 0.124 seconds, NOT INSTANTANEOUS
Here is a discussion of the technique we used in CRASH 97
- we never created a commercial version of CRASH97 since computer technology advanced to allow us to automatically iterate/optimize SMAC, see paper SMAC 2003.
- Also see our topic Some momentum Misconceptions